from typing import List

class Solution:
    def twoSum(self, nums: List[int], target: int) -> List[int]:
        for i in range(len(nums)):
            for j in range(i + 1, len(nums)):
                if nums[i] + nums[j] == target:
                    return [i, j]

    def twoSum_better(self, nums: List[int], target: int) -> List[int]:
        num_dict = {}

        for i in range(len(nums)):
            complement = target - nums[i]
            if complement in num_dict:
                return [num_dict[complement], i]
            else:
                num_dict[nums[i]] = i
        return []