diff --git a/dart/leap/.dart_tool/package_config.json b/dart/leap/.dart_tool/package_config.json
new file mode 100644
index 0000000..12f2ed0
--- /dev/null
+++ b/dart/leap/.dart_tool/package_config.json
@@ -0,0 +1,310 @@
+{
+  "configVersion": 2,
+  "packages": [
+    {
+      "name": "_fe_analyzer_shared",
+      "rootUri": "file:///home/sanctus/.pub-cache/hosted/pub.dev/_fe_analyzer_shared-109.0.0",
+      "packageUri": "lib/",
+      "languageVersion": "3.11"
+    },
+    {
+      "name": "analyzer",
+      "rootUri": "file:///home/sanctus/.pub-cache/hosted/pub.dev/analyzer-14.5.0",
+      "packageUri": "lib/",
+      "languageVersion": "3.11"
+    },
+    {
+      "name": "args",
+      "rootUri": "file:///home/sanctus/.pub-cache/hosted/pub.dev/args-2.7.0",
+      "packageUri": "lib/",
+      "languageVersion": "3.3"
+    },
+    {
+      "name": "async",
+      "rootUri": "file:///home/sanctus/.pub-cache/hosted/pub.dev/async-2.13.1",
+      "packageUri": "lib/",
+      "languageVersion": "3.4"
+    },
+    {
+      "name": "boolean_selector",
+      "rootUri": "file:///home/sanctus/.pub-cache/hosted/pub.dev/boolean_selector-2.1.2",
+      "packageUri": "lib/",
+      "languageVersion": "3.1"
+    },
+    {
+      "name": "cli_config",
+      "rootUri": "file:///home/sanctus/.pub-cache/hosted/pub.dev/cli_config-0.2.0",
+      "packageUri": "lib/",
+      "languageVersion": "3.0"
+    },
+    {
+      "name": "cli_util",
+      "rootUri": "file:///home/sanctus/.pub-cache/hosted/pub.dev/cli_util-0.6.0",
+      "packageUri": "lib/",
+      "languageVersion": "3.7"
+    },
+    {
+      "name": "collection",
+      "rootUri": "file:///home/sanctus/.pub-cache/hosted/pub.dev/collection-1.19.1",
+      "packageUri": "lib/",
+      "languageVersion": "3.4"
+    },
+    {
+      "name": "convert",
+      "rootUri": "file:///home/sanctus/.pub-cache/hosted/pub.dev/convert-3.1.2",
+      "packageUri": "lib/",
+      "languageVersion": "3.4"
+    },
+    {
+      "name": "coverage",
+      "rootUri": "file:///home/sanctus/.pub-cache/hosted/pub.dev/coverage-1.16.0",
+      "packageUri": "lib/",
+      "languageVersion": "3.9"
+    },
+    {
+      "name": "crypto",
+      "rootUri": "file:///home/sanctus/.pub-cache/hosted/pub.dev/crypto-3.0.7",
+      "packageUri": "lib/",
+      "languageVersion": "3.4"
+    },
+    {
+      "name": "ffi",
+      "rootUri": "file:///home/sanctus/.pub-cache/hosted/pub.dev/ffi-2.2.0",
+      "packageUri": "lib/",
+      "languageVersion": "3.7"
+    },
+    {
+      "name": "file",
+      "rootUri": "file:///home/sanctus/.pub-cache/hosted/pub.dev/file-7.0.1",
+      "packageUri": "lib/",
+      "languageVersion": "3.0"
+    },
+    {
+      "name": "frontend_server_client",
+      "rootUri": "file:///home/sanctus/.pub-cache/hosted/pub.dev/frontend_server_client-4.1.0",
+      "packageUri": "lib/",
+      "languageVersion": "3.10"
+    },
+    {
+      "name": "glob",
+      "rootUri": "file:///home/sanctus/.pub-cache/hosted/pub.dev/glob-2.2.0",
+      "packageUri": "lib/",
+      "languageVersion": "3.3"
+    },
+    {
+      "name": "http_multi_server",
+      "rootUri": "file:///home/sanctus/.pub-cache/hosted/pub.dev/http_multi_server-3.2.3",
+      "packageUri": "lib/",
+      "languageVersion": "3.2"
+    },
+    {
+      "name": "http_parser",
+      "rootUri": "file:///home/sanctus/.pub-cache/hosted/pub.dev/http_parser-4.1.2",
+      "packageUri": "lib/",
+      "languageVersion": "3.4"
+    },
+    {
+      "name": "io",
+      "rootUri": "file:///home/sanctus/.pub-cache/hosted/pub.dev/io-1.1.0",
+      "packageUri": "lib/",
+      "languageVersion": "3.4"
+    },
+    {
+      "name": "logging",
+      "rootUri": "file:///home/sanctus/.pub-cache/hosted/pub.dev/logging-1.3.0",
+      "packageUri": "lib/",
+      "languageVersion": "3.4"
+    },
+    {
+      "name": "matcher",
+      "rootUri": "file:///home/sanctus/.pub-cache/hosted/pub.dev/matcher-0.12.20",
+      "packageUri": "lib/",
+      "languageVersion": "3.10"
+    },
+    {
+      "name": "meta",
+      "rootUri": "file:///home/sanctus/.pub-cache/hosted/pub.dev/meta-1.19.0",
+      "packageUri": "lib/",
+      "languageVersion": "3.5"
+    },
+    {
+      "name": "mime",
+      "rootUri": "file:///home/sanctus/.pub-cache/hosted/pub.dev/mime-2.1.0",
+      "packageUri": "lib/",
+      "languageVersion": "3.2"
+    },
+    {
+      "name": "node_preamble",
+      "rootUri": "file:///home/sanctus/.pub-cache/hosted/pub.dev/node_preamble-2.0.2",
+      "packageUri": "lib/",
+      "languageVersion": "2.12"
+    },
+    {
+      "name": "package_config",
+      "rootUri": "file:///home/sanctus/.pub-cache/hosted/pub.dev/package_config-3.0.0",
+      "packageUri": "lib/",
+      "languageVersion": "3.11"
+    },
+    {
+      "name": "path",
+      "rootUri": "file:///home/sanctus/.pub-cache/hosted/pub.dev/path-1.9.1",
+      "packageUri": "lib/",
+      "languageVersion": "3.4"
+    },
+    {
+      "name": "pool",
+      "rootUri": "file:///home/sanctus/.pub-cache/hosted/pub.dev/pool-1.5.3",
+      "packageUri": "lib/",
+      "languageVersion": "3.4"
+    },
+    {
+      "name": "pub_semver",
+      "rootUri": "file:///home/sanctus/.pub-cache/hosted/pub.dev/pub_semver-2.2.1",
+      "packageUri": "lib/",
+      "languageVersion": "3.4"
+    },
+    {
+      "name": "shelf",
+      "rootUri": "file:///home/sanctus/.pub-cache/hosted/pub.dev/shelf-1.4.3",
+      "packageUri": "lib/",
+      "languageVersion": "3.9"
+    },
+    {
+      "name": "shelf_packages_handler",
+      "rootUri": "file:///home/sanctus/.pub-cache/hosted/pub.dev/shelf_packages_handler-3.0.2",
+      "packageUri": "lib/",
+      "languageVersion": "2.17"
+    },
+    {
+      "name": "shelf_static",
+      "rootUri": "file:///home/sanctus/.pub-cache/hosted/pub.dev/shelf_static-1.2.0",
+      "packageUri": "lib/",
+      "languageVersion": "3.9"
+    },
+    {
+      "name": "shelf_web_socket",
+      "rootUri": "file:///home/sanctus/.pub-cache/hosted/pub.dev/shelf_web_socket-3.0.0",
+      "packageUri": "lib/",
+      "languageVersion": "3.5"
+    },
+    {
+      "name": "source_map_stack_trace",
+      "rootUri": "file:///home/sanctus/.pub-cache/hosted/pub.dev/source_map_stack_trace-2.1.2",
+      "packageUri": "lib/",
+      "languageVersion": "3.3"
+    },
+    {
+      "name": "source_maps",
+      "rootUri": "file:///home/sanctus/.pub-cache/hosted/pub.dev/source_maps-0.10.14",
+      "packageUri": "lib/",
+      "languageVersion": "3.3"
+    },
+    {
+      "name": "source_span",
+      "rootUri": "file:///home/sanctus/.pub-cache/hosted/pub.dev/source_span-1.10.2",
+      "packageUri": "lib/",
+      "languageVersion": "3.1"
+    },
+    {
+      "name": "stack_trace",
+      "rootUri": "file:///home/sanctus/.pub-cache/hosted/pub.dev/stack_trace-1.12.2",
+      "packageUri": "lib/",
+      "languageVersion": "3.4"
+    },
+    {
+      "name": "stream_channel",
+      "rootUri": "file:///home/sanctus/.pub-cache/hosted/pub.dev/stream_channel-2.1.4",
+      "packageUri": "lib/",
+      "languageVersion": "3.3"
+    },
+    {
+      "name": "string_scanner",
+      "rootUri": "file:///home/sanctus/.pub-cache/hosted/pub.dev/string_scanner-1.4.1",
+      "packageUri": "lib/",
+      "languageVersion": "3.1"
+    },
+    {
+      "name": "term_glyph",
+      "rootUri": "file:///home/sanctus/.pub-cache/hosted/pub.dev/term_glyph-1.2.2",
+      "packageUri": "lib/",
+      "languageVersion": "3.1"
+    },
+    {
+      "name": "test",
+      "rootUri": "file:///home/sanctus/.pub-cache/hosted/pub.dev/test-1.33.0",
+      "packageUri": "lib/",
+      "languageVersion": "3.11"
+    },
+    {
+      "name": "test_api",
+      "rootUri": "file:///home/sanctus/.pub-cache/hosted/pub.dev/test_api-0.7.15",
+      "packageUri": "lib/",
+      "languageVersion": "3.11"
+    },
+    {
+      "name": "test_core",
+      "rootUri": "file:///home/sanctus/.pub-cache/hosted/pub.dev/test_core-0.6.21",
+      "packageUri": "lib/",
+      "languageVersion": "3.11"
+    },
+    {
+      "name": "typed_data",
+      "rootUri": "file:///home/sanctus/.pub-cache/hosted/pub.dev/typed_data-1.4.0",
+      "packageUri": "lib/",
+      "languageVersion": "3.5"
+    },
+    {
+      "name": "vm_service",
+      "rootUri": "file:///home/sanctus/.pub-cache/hosted/pub.dev/vm_service-15.4.0",
+      "packageUri": "lib/",
+      "languageVersion": "3.5"
+    },
+    {
+      "name": "watcher",
+      "rootUri": "file:///home/sanctus/.pub-cache/hosted/pub.dev/watcher-1.2.1",
+      "packageUri": "lib/",
+      "languageVersion": "3.4"
+    },
+    {
+      "name": "web",
+      "rootUri": "file:///home/sanctus/.pub-cache/hosted/pub.dev/web-1.1.1",
+      "packageUri": "lib/",
+      "languageVersion": "3.4"
+    },
+    {
+      "name": "web_socket",
+      "rootUri": "file:///home/sanctus/.pub-cache/hosted/pub.dev/web_socket-1.0.1",
+      "packageUri": "lib/",
+      "languageVersion": "3.4"
+    },
+    {
+      "name": "web_socket_channel",
+      "rootUri": "file:///home/sanctus/.pub-cache/hosted/pub.dev/web_socket_channel-3.0.3",
+      "packageUri": "lib/",
+      "languageVersion": "3.3"
+    },
+    {
+      "name": "webkit_inspection_protocol",
+      "rootUri": "file:///home/sanctus/.pub-cache/hosted/pub.dev/webkit_inspection_protocol-1.2.1",
+      "packageUri": "lib/",
+      "languageVersion": "3.0"
+    },
+    {
+      "name": "yaml",
+      "rootUri": "file:///home/sanctus/.pub-cache/hosted/pub.dev/yaml-3.1.4",
+      "packageUri": "lib/",
+      "languageVersion": "3.4"
+    },
+    {
+      "name": "leap",
+      "rootUri": "../",
+      "packageUri": "lib/",
+      "languageVersion": "3.2"
+    }
+  ],
+  "generator": "pub",
+  "generatorVersion": "3.11.0",
+  "flutterRoot": "file:///home/sanctus/flutter",
+  "flutterVersion": "3.41.2",
+  "pubCache": "file:///home/sanctus/.pub-cache"
+}
diff --git a/dart/leap/.dart_tool/package_graph.json b/dart/leap/.dart_tool/package_graph.json
new file mode 100644
index 0000000..ef1473f
--- /dev/null
+++ b/dart/leap/.dart_tool/package_graph.json
@@ -0,0 +1,457 @@
+{
+  "roots": [
+    "leap"
+  ],
+  "packages": [
+    {
+      "name": "leap",
+      "version": "0.0.0",
+      "dependencies": [],
+      "devDependencies": [
+        "test"
+      ]
+    },
+    {
+      "name": "test",
+      "version": "1.33.0",
+      "dependencies": [
+        "analyzer",
+        "async",
+        "boolean_selector",
+        "collection",
+        "coverage",
+        "http_multi_server",
+        "io",
+        "matcher",
+        "node_preamble",
+        "package_config",
+        "path",
+        "pool",
+        "shelf",
+        "shelf_packages_handler",
+        "shelf_static",
+        "shelf_web_socket",
+        "source_span",
+        "stack_trace",
+        "stream_channel",
+        "test_api",
+        "test_core",
+        "typed_data",
+        "web_socket_channel",
+        "webkit_inspection_protocol",
+        "yaml"
+      ]
+    },
+    {
+      "name": "test_core",
+      "version": "0.6.21",
+      "dependencies": [
+        "analyzer",
+        "args",
+        "async",
+        "boolean_selector",
+        "collection",
+        "coverage",
+        "frontend_server_client",
+        "glob",
+        "io",
+        "meta",
+        "package_config",
+        "path",
+        "pool",
+        "source_map_stack_trace",
+        "source_maps",
+        "source_span",
+        "stack_trace",
+        "stream_channel",
+        "test_api",
+        "vm_service",
+        "yaml"
+      ]
+    },
+    {
+      "name": "test_api",
+      "version": "0.7.15",
+      "dependencies": [
+        "async",
+        "boolean_selector",
+        "collection",
+        "meta",
+        "source_span",
+        "stack_trace",
+        "stream_channel",
+        "string_scanner",
+        "term_glyph"
+      ]
+    },
+    {
+      "name": "shelf_packages_handler",
+      "version": "3.0.2",
+      "dependencies": [
+        "path",
+        "shelf",
+        "shelf_static"
+      ]
+    },
+    {
+      "name": "node_preamble",
+      "version": "2.0.2",
+      "dependencies": []
+    },
+    {
+      "name": "coverage",
+      "version": "1.16.0",
+      "dependencies": [
+        "args",
+        "cli_config",
+        "cli_util",
+        "glob",
+        "logging",
+        "meta",
+        "package_config",
+        "path",
+        "source_maps",
+        "stack_trace",
+        "vm_service",
+        "yaml"
+      ]
+    },
+    {
+      "name": "cli_util",
+      "version": "0.6.0",
+      "dependencies": [
+        "ffi",
+        "meta",
+        "path"
+      ]
+    },
+    {
+      "name": "cli_config",
+      "version": "0.2.0",
+      "dependencies": [
+        "args",
+        "yaml"
+      ]
+    },
+    {
+      "name": "ffi",
+      "version": "2.2.0",
+      "dependencies": []
+    },
+    {
+      "name": "yaml",
+      "version": "3.1.4",
+      "dependencies": [
+        "collection",
+        "source_span",
+        "string_scanner"
+      ]
+    },
+    {
+      "name": "boolean_selector",
+      "version": "2.1.2",
+      "dependencies": [
+        "source_span",
+        "string_scanner"
+      ]
+    },
+    {
+      "name": "source_map_stack_trace",
+      "version": "2.1.2",
+      "dependencies": [
+        "path",
+        "source_maps",
+        "stack_trace"
+      ]
+    },
+    {
+      "name": "glob",
+      "version": "2.2.0",
+      "dependencies": [
+        "async",
+        "collection",
+        "file",
+        "path",
+        "string_scanner"
+      ]
+    },
+    {
+      "name": "args",
+      "version": "2.7.0",
+      "dependencies": []
+    },
+    {
+      "name": "term_glyph",
+      "version": "1.2.2",
+      "dependencies": []
+    },
+    {
+      "name": "typed_data",
+      "version": "1.4.0",
+      "dependencies": [
+        "collection"
+      ]
+    },
+    {
+      "name": "pool",
+      "version": "1.5.3",
+      "dependencies": [
+        "async",
+        "stack_trace"
+      ]
+    },
+    {
+      "name": "frontend_server_client",
+      "version": "4.1.0",
+      "dependencies": [
+        "async",
+        "package_config",
+        "path"
+      ]
+    },
+    {
+      "name": "package_config",
+      "version": "3.0.0",
+      "dependencies": [
+        "meta"
+      ]
+    },
+    {
+      "name": "string_scanner",
+      "version": "1.4.1",
+      "dependencies": [
+        "source_span"
+      ]
+    },
+    {
+      "name": "file",
+      "version": "7.0.1",
+      "dependencies": [
+        "meta",
+        "path"
+      ]
+    },
+    {
+      "name": "path",
+      "version": "1.9.1",
+      "dependencies": []
+    },
+    {
+      "name": "webkit_inspection_protocol",
+      "version": "1.2.1",
+      "dependencies": [
+        "logging"
+      ]
+    },
+    {
+      "name": "stream_channel",
+      "version": "2.1.4",
+      "dependencies": [
+        "async"
+      ]
+    },
+    {
+      "name": "source_maps",
+      "version": "0.10.14",
+      "dependencies": [
+        "source_span"
+      ]
+    },
+    {
+      "name": "stack_trace",
+      "version": "1.12.2",
+      "dependencies": [
+        "path"
+      ]
+    },
+    {
+      "name": "shelf_static",
+      "version": "1.2.0",
+      "dependencies": [
+        "convert",
+        "http_parser",
+        "mime",
+        "path",
+        "shelf"
+      ]
+    },
+    {
+      "name": "matcher",
+      "version": "0.12.20",
+      "dependencies": [
+        "async",
+        "meta",
+        "stack_trace",
+        "term_glyph",
+        "test_api"
+      ]
+    },
+    {
+      "name": "async",
+      "version": "2.13.1",
+      "dependencies": [
+        "collection",
+        "meta"
+      ]
+    },
+    {
+      "name": "io",
+      "version": "1.1.0",
+      "dependencies": [
+        "meta",
+        "path",
+        "string_scanner"
+      ]
+    },
+    {
+      "name": "http_multi_server",
+      "version": "3.2.3",
+      "dependencies": [
+        "async"
+      ]
+    },
+    {
+      "name": "http_parser",
+      "version": "4.1.2",
+      "dependencies": [
+        "collection",
+        "source_span",
+        "string_scanner",
+        "typed_data"
+      ]
+    },
+    {
+      "name": "collection",
+      "version": "1.19.1",
+      "dependencies": []
+    },
+    {
+      "name": "convert",
+      "version": "3.1.2",
+      "dependencies": [
+        "typed_data"
+      ]
+    },
+    {
+      "name": "meta",
+      "version": "1.19.0",
+      "dependencies": []
+    },
+    {
+      "name": "logging",
+      "version": "1.3.0",
+      "dependencies": []
+    },
+    {
+      "name": "source_span",
+      "version": "1.10.2",
+      "dependencies": [
+        "collection",
+        "path",
+        "term_glyph"
+      ]
+    },
+    {
+      "name": "shelf_web_socket",
+      "version": "3.0.0",
+      "dependencies": [
+        "shelf",
+        "stream_channel",
+        "web_socket_channel"
+      ]
+    },
+    {
+      "name": "mime",
+      "version": "2.1.0",
+      "dependencies": []
+    },
+    {
+      "name": "analyzer",
+      "version": "14.5.0",
+      "dependencies": [
+        "_fe_analyzer_shared",
+        "collection",
+        "convert",
+        "crypto",
+        "glob",
+        "meta",
+        "package_config",
+        "path",
+        "pub_semver",
+        "source_span",
+        "watcher",
+        "yaml"
+      ]
+    },
+    {
+      "name": "_fe_analyzer_shared",
+      "version": "109.0.0",
+      "dependencies": [
+        "meta"
+      ]
+    },
+    {
+      "name": "pub_semver",
+      "version": "2.2.1",
+      "dependencies": [
+        "collection"
+      ]
+    },
+    {
+      "name": "watcher",
+      "version": "1.2.1",
+      "dependencies": [
+        "async",
+        "path"
+      ]
+    },
+    {
+      "name": "crypto",
+      "version": "3.0.7",
+      "dependencies": [
+        "typed_data"
+      ]
+    },
+    {
+      "name": "shelf",
+      "version": "1.4.3",
+      "dependencies": [
+        "async",
+        "collection",
+        "http_parser",
+        "path",
+        "stack_trace",
+        "stream_channel"
+      ]
+    },
+    {
+      "name": "web_socket_channel",
+      "version": "3.0.3",
+      "dependencies": [
+        "async",
+        "crypto",
+        "stream_channel",
+        "web",
+        "web_socket"
+      ]
+    },
+    {
+      "name": "web_socket",
+      "version": "1.0.1",
+      "dependencies": [
+        "web"
+      ]
+    },
+    {
+      "name": "web",
+      "version": "1.1.1",
+      "dependencies": []
+    },
+    {
+      "name": "vm_service",
+      "version": "15.4.0",
+      "dependencies": []
+    }
+  ],
+  "configVersion": 1
+}
\ No newline at end of file
diff --git a/dart/leap/.dart_tool/pub/bin/test/test.dart-3.11.0.snapshot b/dart/leap/.dart_tool/pub/bin/test/test.dart-3.11.0.snapshot
new file mode 100644
index 0000000..9f9e6a9
Binary files /dev/null and b/dart/leap/.dart_tool/pub/bin/test/test.dart-3.11.0.snapshot differ
diff --git a/dart/leap/.dart_tool/test/incremental_kernel.Ly9AZGFydD0zLjI= b/dart/leap/.dart_tool/test/incremental_kernel.Ly9AZGFydD0zLjI=
new file mode 100644
index 0000000..745a534
Binary files /dev/null and b/dart/leap/.dart_tool/test/incremental_kernel.Ly9AZGFydD0zLjI= differ
diff --git a/dart/leap/.exercism/config.json b/dart/leap/.exercism/config.json
new file mode 100644
index 0000000..4135808
--- /dev/null
+++ b/dart/leap/.exercism/config.json
@@ -0,0 +1,27 @@
+{
+  "authors": [
+    "SuperPaintman"
+  ],
+  "contributors": [
+    "jvarness",
+    "Stargator",
+    "kytrinyx"
+  ],
+  "files": {
+    "solution": [
+      "lib/leap.dart"
+    ],
+    "test": [
+      "test/leap_test.dart"
+    ],
+    "example": [
+      ".meta/lib/example.dart"
+    ],
+    "invalidator": [
+      "pubspec.yaml"
+    ]
+  },
+  "blurb": "Determine whether a given year is a leap year.",
+  "source": "CodeRanch Cattle Drive, Assignment 3",
+  "source_url": "https://web.archive.org/web/20240907033714/https://coderanch.com/t/718816/Leap"
+}
diff --git a/dart/leap/.exercism/metadata.json b/dart/leap/.exercism/metadata.json
new file mode 100644
index 0000000..3f0e14f
--- /dev/null
+++ b/dart/leap/.exercism/metadata.json
@@ -0,0 +1 @@
+{"track":"dart","exercise":"leap","id":"86add6a25fe54052987310d5c9191d4f","url":"https://exercism.org/tracks/dart/exercises/leap","handle":"sanctushck","is_requester":true,"auto_approve":false}
\ No newline at end of file
diff --git a/dart/leap/HELP.md b/dart/leap/HELP.md
new file mode 100644
index 0000000..73de501
--- /dev/null
+++ b/dart/leap/HELP.md
@@ -0,0 +1,61 @@
+# Help
+
+## Correr os testes
+
+Instala as dependências.
+
+```sh
+dart pub get
+```
+
+Corre os testes.
+
+```sh
+dart test
+```
+
+Para obteres uma saída mais detalhada por teste, usa o relator expandido.
+
+```sh
+dart test -r expanded
+```
+
+A maioria dos exercícios tem vários testes, e todos exceto o primeiro são ignorados por defeito.
+Para fazeres os testes um a um, altera `skip: true` para `skip: false` em cada teste à medida que avanças.
+
+Em alternativa, corre todos os testes de uma só vez sem editares o ficheiro.
+
+```sh
+dart test --run-skipped
+```
+
+Todos os testes são executados pelo executor de testes online ao submeteres, incluindo os ignorados.
+
+## Submeter a tua solução
+
+Podes submeter a tua solução com o comando `exercism submit lib/leap.dart`.
+Este comando envia a tua solução para o site do Exercism e imprime o URL da página da solução.
+
+É possível submeter uma solução incompleta, o que te permite:
+
+- Ver como outras pessoas resolveram o exercício
+- Pedir ajuda a um mentor
+
+## Precisas de ajuda?
+
+Se quiseres ajuda para resolver o exercício, consulta as seguintes páginas:
+
+- A [documentação do percurso Dart](https://exercism.org/docs/tracks/dart)
+- A [categoria de programação do percurso Dart no fórum](https://forum.exercism.org/c/programming/dart)
+- A [categoria de programação do Exercism no fórum](https://forum.exercism.org/c/programming/5)
+- As [Perguntas Frequentes](https://exercism.org/docs/using/faqs)
+
+Se esses recursos não forem suficientes, podes submeter a tua solução (incompleta) para pedir mentoria.
+
+Se tiveres dificuldades e precisares de ajuda, podes recorrer a um destes recursos:
+
+- [Documentação da API do Dart](https://api.dart.dev/)
+- [Chat do Dart no Gitter](https://gitter.im/dart-lang/home)
+- [Informações da comunidade](https://www.dart.dev/community)
+- O [/r/dartlang](https://www.reddit.com/r/dartlang) é o subreddit do Dart.
+- O [StackOverflow](https://stackoverflow.com/questions/tagged/dart) pode ser usado para procurar o teu problema e ver se já foi respondido. Também podes fazer e responder a perguntas.
\ No newline at end of file
diff --git a/dart/leap/README.md b/dart/leap/README.md
new file mode 100644
index 0000000..1bdb7d2
--- /dev/null
+++ b/dart/leap/README.md
@@ -0,0 +1,41 @@
+# Ano bissexto
+
+Bem-vindo ao Ano bissexto no percurso Dart do Exercism.
+Se precisares de ajuda para correr os testes ou para submeter o teu código, consulta o `HELP.md`.
+
+## Introduction
+
+Um ano bissexto (no calendário gregoriano) ocorre:
+
+- Em todos os anos divisíveis por 4.
+- Exceto quando o ano é divisível por 100; nesse caso, só é bissexto se também for divisível por 400.
+
+Alguns exemplos:
+
+- 1997 não foi um ano bissexto, porque não é divisível por 4.
+- 1900 não foi um ano bissexto, porque não é divisível por 400.
+- 2000 foi um ano bissexto!
+
+~~~~exercism/note
+Para uma explicação encantadora de quatro minutos sobre todo o fenómeno dos anos bissextos, vê [este vídeo do YouTube](https://www.youtube.com/watch?v=xX96xng7sAE).
+~~~~
+
+## Instructions
+
+A tua tarefa é determinar se um dado ano é bissexto.
+
+## Source
+
+### Created by
+
+- @SuperPaintman
+
+### Contributed to by
+
+- @jvarness
+- @Stargator
+- @kytrinyx
+
+### Based on
+
+CodeRanch Cattle Drive, Assignment 3 - https://web.archive.org/web/20240907033714/https://coderanch.com/t/718816/Leap
\ No newline at end of file
diff --git a/dart/leap/analysis_options.yaml b/dart/leap/analysis_options.yaml
new file mode 100644
index 0000000..c06363d
--- /dev/null
+++ b/dart/leap/analysis_options.yaml
@@ -0,0 +1,18 @@
+analyzer:
+  strong-mode:
+    implicit-casts: false
+    implicit-dynamic: false
+  errors:
+    unused_element:        error
+    unused_import:         error
+    unused_local_variable: error
+    dead_code:             error
+
+linter:
+  rules:
+    # Error Rules
+    - avoid_relative_lib_imports
+    - avoid_types_as_parameter_names
+    - literal_only_boolean_expressions
+    - no_adjacent_strings_in_list
+    - valid_regexps
diff --git a/dart/leap/lib/leap.dart b/dart/leap/lib/leap.dart
new file mode 100644
index 0000000..c91a0a0
--- /dev/null
+++ b/dart/leap/lib/leap.dart
@@ -0,0 +1,5 @@
+class Leap {
+  bool leapYear(int year) {
+    return ((year % 4) == 0 && ((year % 400 == 0) || (year % 100 != 0)));
+  }
+}
diff --git a/dart/leap/pubspec.lock b/dart/leap/pubspec.lock
new file mode 100644
index 0000000..d789a76
--- /dev/null
+++ b/dart/leap/pubspec.lock
@@ -0,0 +1,397 @@
+# Generated by pub
+# See https://dart.dev/tools/pub/glossary#lockfile
+packages:
+  _fe_analyzer_shared:
+    dependency: transitive
+    description:
+      name: _fe_analyzer_shared
+      sha256: "48e48f73a431eb269eec66d243a63a07ed90ef9417a74047a3b98d52338626ad"
+      url: "https://pub.dev"
+    source: hosted
+    version: "109.0.0"
+  analyzer:
+    dependency: transitive
+    description:
+      name: analyzer
+      sha256: "6d377901d198536b648172974d9d4f277910502cad92193466869cac0ff34990"
+      url: "https://pub.dev"
+    source: hosted
+    version: "14.5.0"
+  args:
+    dependency: transitive
+    description:
+      name: args
+      sha256: d0481093c50b1da8910eb0bb301626d4d8eb7284aa739614d2b394ee09e3ea04
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.7.0"
+  async:
+    dependency: transitive
+    description:
+      name: async
+      sha256: e2eb0491ba5ddb6177742d2da23904574082139b07c1e33b8503b9f46f3e1a37
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.13.1"
+  boolean_selector:
+    dependency: transitive
+    description:
+      name: boolean_selector
+      sha256: "8aab1771e1243a5063b8b0ff68042d67334e3feab9e95b9490f9a6ebf73b42ea"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.2"
+  cli_config:
+    dependency: transitive
+    description:
+      name: cli_config
+      sha256: ac20a183a07002b700f0c25e61b7ee46b23c309d76ab7b7640a028f18e4d99ec
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.2.0"
+  cli_util:
+    dependency: transitive
+    description:
+      name: cli_util
+      sha256: "89b8801ba49f8b593fbf2d3e59efd0f566c46cd4ba6837ae2610c72b52a0f899"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.6.0"
+  collection:
+    dependency: transitive
+    description:
+      name: collection
+      sha256: "2f5709ae4d3d59dd8f7cd309b4e023046b57d8a6c82130785d2b0e5868084e76"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.19.1"
+  convert:
+    dependency: transitive
+    description:
+      name: convert
+      sha256: b30acd5944035672bc15c6b7a8b47d773e41e2f17de064350988c5d02adb1c68
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.1.2"
+  coverage:
+    dependency: transitive
+    description:
+      name: coverage
+      sha256: ff89e37c19355194e279d26dafe8e4bece46c9ea63a30be4dc68214f5bc290d3
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.16.0"
+  crypto:
+    dependency: transitive
+    description:
+      name: crypto
+      sha256: c8ea0233063ba03258fbcf2ca4d6dadfefe14f02fab57702265467a19f27fadf
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.7"
+  ffi:
+    dependency: transitive
+    description:
+      name: ffi
+      sha256: "6d7fd89431262d8f3125e81b50d3847a091d846eafcd4fdb88dd06f36d705a45"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.2.0"
+  file:
+    dependency: transitive
+    description:
+      name: file
+      sha256: a3b4f84adafef897088c160faf7dfffb7696046cb13ae90b508c2cbc95d3b8d4
+      url: "https://pub.dev"
+    source: hosted
+    version: "7.0.1"
+  frontend_server_client:
+    dependency: transitive
+    description:
+      name: frontend_server_client
+      sha256: "404dbf9bce29beafbe9dcb19219447b6f7d49900cd42b8d3b7af102b24508e25"
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.1.0"
+  glob:
+    dependency: transitive
+    description:
+      name: glob
+      sha256: "218aeb56050c714f62a3182775320dfa04602b55074873e24e31bbd39bda96fb"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.2.0"
+  http_multi_server:
+    dependency: transitive
+    description:
+      name: http_multi_server
+      sha256: "361668bdd71f0ae2dc6d17b75a593520f3c414af6534f9eed1aa72049dd71d18"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.2.3"
+  http_parser:
+    dependency: transitive
+    description:
+      name: http_parser
+      sha256: "178d74305e7866013777bab2c3d8726205dc5a4dd935297175b19a23a2e66571"
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.1.2"
+  io:
+    dependency: transitive
+    description:
+      name: io
+      sha256: "2635216ca6a737e60de577ffa1a48a0bec76ca8a62917cfc1bb88c14c570646f"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.0"
+  logging:
+    dependency: transitive
+    description:
+      name: logging
+      sha256: c8245ada5f1717ed44271ed1c26b8ce85ca3228fd2ffdb75468ab01979309d61
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.3.0"
+  matcher:
+    dependency: transitive
+    description:
+      name: matcher
+      sha256: "31bd099b47c10cd1aeb55146a2d46ce0277630ecef3f7dae54ad7873f36696cd"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.12.20"
+  meta:
+    dependency: transitive
+    description:
+      name: meta
+      sha256: "307249ce4ff29d58a18e97f6345f539382eb9c9c29ecda628900f31de0443dd9"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.19.0"
+  mime:
+    dependency: transitive
+    description:
+      name: mime
+      sha256: bd47de35f07e27267e69c8c8b22edf9473bfee170a60d60fcc93730c5144b7f6
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.0"
+  node_preamble:
+    dependency: transitive
+    description:
+      name: node_preamble
+      sha256: "6e7eac89047ab8a8d26cf16127b5ed26de65209847630400f9aefd7cd5c730db"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.2"
+  package_config:
+    dependency: transitive
+    description:
+      name: package_config
+      sha256: ffcf4cf3d6c0b74ac43708d9f56625506e8a68aa935abe9d267a7330f320eb5d
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.0"
+  path:
+    dependency: transitive
+    description:
+      name: path
+      sha256: "75cca69d1490965be98c73ceaea117e8a04dd21217b37b292c9ddbec0d955bc5"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.9.1"
+  pool:
+    dependency: transitive
+    description:
+      name: pool
+      sha256: "4177f68c237ea2128d1bee66ac17b2ce05ba3dbaafcbdd54c5d40a39d0b6b11c"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.5.3"
+  pub_semver:
+    dependency: transitive
+    description:
+      name: pub_semver
+      sha256: "261236774e8b1d69cfc6b9eabbc96c40f25e7a2d6b171f3385d4f65d5734fb24"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.2.1"
+  shelf:
+    dependency: transitive
+    description:
+      name: shelf
+      sha256: e75e9cf311d7fd712048038cc17c25199c38536c20330d53e7db058b543d5a48
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.4.3"
+  shelf_packages_handler:
+    dependency: transitive
+    description:
+      name: shelf_packages_handler
+      sha256: "89f967eca29607c933ba9571d838be31d67f53f6e4ee15147d5dc2934fee1b1e"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.2"
+  shelf_static:
+    dependency: transitive
+    description:
+      name: shelf_static
+      sha256: "480504af9e5323899c5be26a4f6c2fc4437d50954d39842f0290f4ae733d57b4"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.2.0"
+  shelf_web_socket:
+    dependency: transitive
+    description:
+      name: shelf_web_socket
+      sha256: "3632775c8e90d6c9712f883e633716432a27758216dfb61bd86a8321c0580925"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.0"
+  source_map_stack_trace:
+    dependency: transitive
+    description:
+      name: source_map_stack_trace
+      sha256: c0713a43e323c3302c2abe2a1cc89aa057a387101ebd280371d6a6c9fa68516b
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.2"
+  source_maps:
+    dependency: transitive
+    description:
+      name: source_maps
+      sha256: "14c2945847669b44089bb1222f66873d7ff7103c58911917f2a63c5a62327898"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.10.14"
+  source_span:
+    dependency: transitive
+    description:
+      name: source_span
+      sha256: "56a02f1f4cd1a2d96303c0144c93bd6d909eea6bee6bf5a0e0b685edbd4c47ab"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.10.2"
+  stack_trace:
+    dependency: transitive
+    description:
+      name: stack_trace
+      sha256: "277654b3034d17ac6f9f1cb5595db011b1d5d41e8806866db28e0abaa101c490"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.12.2"
+  stream_channel:
+    dependency: transitive
+    description:
+      name: stream_channel
+      sha256: "969e04c80b8bcdf826f8f16579c7b14d780458bd97f56d107d3950fdbeef059d"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.4"
+  string_scanner:
+    dependency: transitive
+    description:
+      name: string_scanner
+      sha256: "921cd31725b72fe181906c6a94d987c78e3b98c2e205b397ea399d4054872b43"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.4.1"
+  term_glyph:
+    dependency: transitive
+    description:
+      name: term_glyph
+      sha256: "7f554798625ea768a7518313e58f83891c7f5024f88e46e7182a4558850a4b8e"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.2.2"
+  test:
+    dependency: "direct dev"
+    description:
+      name: test
+      sha256: "44b2fccf4407bcdb5e105c064c5d6b5e2a640c87761f8b03cdce8cf532d98cfa"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.33.0"
+  test_api:
+    dependency: transitive
+    description:
+      name: test_api
+      sha256: "47481c58bb92d0b1d218f0510ff5647e768f8e1256d07077a151fb520923b51d"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.7.15"
+  test_core:
+    dependency: transitive
+    description:
+      name: test_core
+      sha256: "9dec4c178bd61493e1cd2060ffe701fcb61c43da2493e99590fb1b0cc82eb4af"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.6.21"
+  typed_data:
+    dependency: transitive
+    description:
+      name: typed_data
+      sha256: f9049c039ebfeb4cf7a7104a675823cd72dba8297f264b6637062516699fa006
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.4.0"
+  vm_service:
+    dependency: transitive
+    description:
+      name: vm_service
+      sha256: "89b11d62e1040ee681af3b4f1c97a803ecbf010c6e8b9c5896ee5b08c3bf7b78"
+      url: "https://pub.dev"
+    source: hosted
+    version: "15.4.0"
+  watcher:
+    dependency: transitive
+    description:
+      name: watcher
+      sha256: "1398c9f081a753f9226febe8900fce8f7d0a67163334e1c94a2438339d79d635"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.2.1"
+  web:
+    dependency: transitive
+    description:
+      name: web
+      sha256: "868d88a33d8a87b18ffc05f9f030ba328ffefba92d6c127917a2ba740f9cfe4a"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.1"
+  web_socket:
+    dependency: transitive
+    description:
+      name: web_socket
+      sha256: "34d64019aa8e36bf9842ac014bb5d2f5586ca73df5e4d9bf5c936975cae6982c"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.1"
+  web_socket_channel:
+    dependency: transitive
+    description:
+      name: web_socket_channel
+      sha256: d645757fb0f4773d602444000a8131ff5d48c9e47adfe9772652dd1a4f2d45c8
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.3"
+  webkit_inspection_protocol:
+    dependency: transitive
+    description:
+      name: webkit_inspection_protocol
+      sha256: "87d3f2333bb240704cd3f1c6b5b7acd8a10e7f0bc28c28dcf14e782014f4a572"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.2.1"
+  yaml:
+    dependency: transitive
+    description:
+      name: yaml
+      sha256: f67cdd8e07d3c6329146aaef1ba043542b3134c12489f553ca9a7435d1068aea
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.1.4"
+sdks:
+  dart: ">=3.11.0 <4.0.0"
diff --git a/dart/leap/pubspec.yaml b/dart/leap/pubspec.yaml
new file mode 100644
index 0000000..e16b7e3
--- /dev/null
+++ b/dart/leap/pubspec.yaml
@@ -0,0 +1,5 @@
+name: 'leap'
+environment:
+  sdk: '>=3.2.0 <4.0.0'
+dev_dependencies:
+  test: '<2.0.0'
diff --git a/dart/leap/test/leap_test.dart b/dart/leap/test/leap_test.dart
new file mode 100644
index 0000000..61d1c2e
--- /dev/null
+++ b/dart/leap/test/leap_test.dart
@@ -0,0 +1,53 @@
+import 'package:leap/leap.dart';
+import 'package:test/test.dart';
+
+void main() {
+  final leap = Leap();
+
+  group('Leap', () {
+    test('year not divisible by 4 in common year', () {
+      final result = leap.leapYear(2015);
+      expect(result, equals(false));
+    }, skip: false);
+
+    test('year divisible by 2, not divisible by 4 in common year', () {
+      final result = leap.leapYear(1970);
+      expect(result, equals(false));
+    }, skip: false);
+
+    test('year divisible by 4, not divisible by 100 in leap year', () {
+      final result = leap.leapYear(1996);
+      expect(result, equals(true));
+    }, skip: false);
+
+    test('year divisible by 4 and 5 is still a leap year', () {
+      final result = leap.leapYear(1960);
+      expect(result, equals(true));
+    }, skip: false);
+
+    test('year divisible by 100, not divisible by 400 in common year', () {
+      final result = leap.leapYear(2100);
+      expect(result, equals(false));
+    }, skip: false);
+
+    test('year divisible by 100 but not by 3 is still not a leap year', () {
+      final result = leap.leapYear(1900);
+      expect(result, equals(false));
+    }, skip: false);
+
+    test('year divisible by 400 is leap year', () {
+      final result = leap.leapYear(2000);
+      expect(result, equals(true));
+    }, skip: false);
+
+    test('year divisible by 400 but not by 125 is still a leap year', () {
+      final result = leap.leapYear(2400);
+      expect(result, equals(true));
+    }, skip: false);
+
+    test('year divisible by 200, not divisible by 400 in common year', () {
+      final result = leap.leapYear(1800);
+      expect(result, equals(false));
+    }, skip: false);
+  });
+}
diff --git a/dart/two-fer/.dart_tool/test/incremental_kernel.Ly9AZGFydD0zLjI= b/dart/two-fer/.dart_tool/test/incremental_kernel.Ly9AZGFydD0zLjI=
index 2eff150..a3f1687 100644
Binary files a/dart/two-fer/.dart_tool/test/incremental_kernel.Ly9AZGFydD0zLjI= and b/dart/two-fer/.dart_tool/test/incremental_kernel.Ly9AZGFydD0zLjI= differ