C++ 代码

class Solution {
public:
    vector<int> findNumbersWithSum(vector<int>& nums, int target) {
        unordered_map<int, bool> hash;
        for(auto &x:nums) {
            if(hash[target - x]) return vector<int>{x, target - x};
            else hash[x] = true;
        }
    }
};