Time: 41 ms (12.84%), Space: 13.4 MB (69.71%) - LeetHub

66-plus-one/66-plus-one.py

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+class Solution(object):
+    def plusOne(self, digits):
+        """
+        :type digits: List[int]
+        :rtype: List[int]
+        """
+        i = -1
+        if digits[-1] == 9:
+            digits[-1] = 0
+            i = -2
+            if abs(i) > len(digits):
+                digits.insert(0, 1)
+                return digits
+            while digits[i] == 9:
+                digits[i] = 0
+                if abs(i - 1) > len(digits):
+                    digits.insert(0, 1)
+                    return digits
+                i -= 1
+                  
+        digits[i] += 1
+        return digits
+            
+                
+            
+