#include <iostream>
using namespace std;
#include <bits/stdc++.h>
struct temp
{
int a;
int b;
temp (int a, int b)
{
this->a = a;
this->b = b;
}
};
int main() {
vector<temp> v;
v.emplace_back(1,2);
v.emplace_back(3,4);
for (auto it = v.begin(); it < v.end(); it++)
{
cout<<it->a<<" "<<it->b<<endl;
}
// your code goes here
return 0;
}
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