#include <iostream>
#include<vector>
using namespace std;

vector<int>pairSum(vector<int>nums,int target){
    vector<int>ans;
    int n=nums.size();

    for(int i=0;i<n;i++){
        for(int j=i+1;j<n;j++){
            if (nums[i] + nums [j] == target){
                ans.push_back(i);
                ans.push_back(j);
                return ans;
            }
        }
    }
    
    return ans;
}

int main() {
    vector<int>nums={2,7,11,15};
    int target=13;


    vector<int>ans=pairSum(nums,target);
    cout<<ans[0] << " , " << ans[1] << endl;
    return 0;
}