diff --git a/66-plus_one/python/66.py b/66-plus_one/python/66.py
new file mode 100644
index 0000000..02058de
--- /dev/null
+++ b/66-plus_one/python/66.py
@@ -0,0 +1,22 @@
+# You are given a large integer represented as an integer array digits, where
+# each digits[i] is the ith digit of the integer. The digits are ordered from
+# most significant to least significant in left-to-right order. The large
+# integer does not contain any leading 0's.
+#
+# Increment the large integer by one and return the resulting array of digits.
+
+# só é preciso incrementar o valor no ultimo indice
+#   -> mas e se o numero for '129'? o resultado correcto será '130' e não '120'
+#
+
+
+def plusOne(digits: list[int]) -> list[int]:
+    digits[-1] += 1
+    for n_digit in range(len(digits) - 1, -1, -1):
+        if digits[n_digit] == 10:
+            digits[n_digit] = 0
+            if n_digit == 0:
+                digits.insert(0, 1)
+            else:
+                digits[n_digit - 1] += 1
+    return digits