vector<int> twoSum(vector<int> &nums, int target) {

map<int, int> mapping;

vector<int> ret;

for (int i = 0; i < nums.size(); i++) {

mapping[nums[i]] = i;

};

for (int i = 0; i < nums.size(); i++){

int residue = target - nums[i];

if (mapping.find(residue) != mapping.end() && mapping[residue] != i) {

ret.push_back(i);

ret.push_back(mapping[residue]);

break;

}

}

return ret;

}

std::cout << "Hello, World!" << std::endl;

vector<int> nums = {3, 2, 4};

int target = 6;

Solution a;

vector<int> ret = a.twoSum(nums, target);

for (int i = 0; i < ret.size(); i++)

cout << ret[i] << " ";

return 0;

}