Runtime: 20 ms, faster than 99.86% of Python3 online submissions for First Missing Positive.
Memory Usage: 14.4 MB, less than 14.50% of Python3 online submissions for First Missing Positive.

Runtime: 32 ms, faster than 96.25% of Python3 online submissions for Permutations.
Memory Usage: 14.5 MB, less than 15.12% of Python3 online submissions for Permutations.

Runtime: 24 ms, faster than 98.12% of Python3 online submissions for String to Integer (atoi).
Memory Usage: 14.2 MB, less than 56.64% of Python3 online submissions for String to Integer (atoi).