1. Two Sum

from typing import List

class Solution:
    def twoSum(self, nums: List[int], target: int) -> List[int]:
        tmp = {}
        for i in range(len(nums)):
            tmp[target - nums[i]] = i
        for i in range(len(nums)):
            if nums[i] in tmp and tmp[nums[i]] != i:
                return [i, tmp[nums[i]]]