两数之和

class Solution:
    def twoSum(self, nums: List[int], target: int) -> List[int]:
        hashtable = dict()
        for i, num in enumerate(nums):
            print(i,num)
            if target - num in hashtable:
                return [hashtable[target - num], i]
            print(nums[i])
            print(i)
            hashtable[nums[i]] = i
        return []