map stl Question 10

What will be the output of the following C++ program?

#include <bits/stdc++.h>
using namespace std;
int main()
{

multimap<int, int> mp;

mp.insert({ 2, 30 });
mp.insert({ 1, 40 });
mp.insert({ 3, 60 });
mp.insert({ 1, 20 });
mp.insert({ 5, 50 });

auto it = mp.equal_range(1);


for (auto itr = it.first; itr != it.second; ++itr) {
 cout << itr->first
  << '\t' << itr->second << '\n';
}
return 0;
}