class Solution {
public:
    vector<int> twoSum(vector<int>& numbers, int target) {
        // write code here
        unordered_map<int, int> mp;
        for(int i=0; i<numbers.size(); i++){
            int tmp = target - numbers[i];
            if(mp.find(tmp) != mp.end()) return {mp[tmp], i+1};
            else mp[numbers[i]] = i+1;
        }
        return {};
    }
};

索引值从1开始的,且数据没有范围 不同于leecode