#include<iostream>

#include<vector>

using namespace std;

class Solution {

public:

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

vector<int> v;

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

for(int j = i + 1; j < nums.size(); j++) {

if(nums[i] + nums[j] == target) {

v.push_back(i);

v.push_back(j);

}

}

}

return v;

}

};

int main() {

Solution s;

vector<int> v;

v.push_back(2);

v.push_back(7);

v.push_back(11);

v.push_back(15);

vector<int> v1 = s.twoSum(v, 9);

cout << v1[0] << " " << v1[1] << endl;

}