vector of pair initialization and user input

 vector of pair initialization and user input

#include<bits/stdc++.h>

using namespace std;

void print_vec(vector<pair<int,int>> &v)

{

    for(int i=0;i<v.size();i++)

    {

        cout<<v[i].first<<" "<<v[i].second<<endl;

    }

}

int main()

{

    vector<pair<int,int>> vp={{1,2},{3,4},{5,6}};//initialization

    print_vec(vp);

   //user input

   vp.clear();

   int n;

   cin>>n;

   for(int i=0;i<n;i++)

   {

      int x,y;

      cin>>x>>y;

      vp.push_back({x,y});

   }

   print_vec(vp);

    return 0;

}