Language: C++

#include<iostream>
#include <string>
#include<vector>
#include<set>
#include<algorithm>
typedef long long ll;

using namespace std;
void hyoji(int bango) {
	if(bango<10){
		cout << "00000" << bango;
	}
	else if(bango<100){
		cout << "0000" << bango ;
	}
	else if (bango < 1000) {
		cout << "000" << bango ;
	}
	else if (bango < 10000) {
		cout << "00" << bango;
	}
	else if (bango < 100000) {
		cout << "0" << bango;
	}
	else  {
		cout << bango ;
	}
}

int main()
{
	int n, m;
	cin >> n >> m;
	vector<int> ps(m);
	vector<int> ys(m);
	for (int i = 0; i < m; i++) {
		cin >> ps[i] >> ys[i];
	}

	vector<set<int>> narabi(n+1);
	for (int i = 0; i < m; i++) {
		narabi[ps[i]].insert(ys[i]);
	}
	for (int i = 0; i < n + 1; i++) {
		sort(narabi[i].begin(), narabi[i].end());
	}

	for (int i = 0; i < m; i++) {
		int kotae=distance(narabi[ps[i]].begin(),narabi[ps[i]].find(ys[i]));
		hyoji(ps[i]);
		hyoji(kotae);
		cout << endl;			
	}
	return 0;
}

Compiler output:
In file included from /usr/include/c++/14/algorithm:61,
                 from a.cc:5:
/usr/include/c++/14/bits/stl_algo.h: In instantiation of 'void std::__sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = _Rb_tree_const_iterator<int>; _Compare = __gnu_cxx::__ops::_Iter_less_iter]':
/usr/include/c++/14/bits/stl_algo.h:4772:18:   required from 'void std::sort(_RAIter, _RAIter) [with _RAIter = _Rb_tree_const_iterator<int>]'
 4772 |       std::__sort(__first, __last, __gnu_cxx::__ops::__iter_less_iter());
      |       ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
a.cc:45:7:   required from here
   45 |                 sort(narabi[i].begin(), narabi[i].end());
      |                 ~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algo.h:1906:50: error: no match for 'operator-' (operand types are 'std::_Rb_tree_const_iterator<int>' and 'std::_Rb_tree_const_iterator<int>')
 1906 |                                 std::__lg(__last - __first) * 2,
      |                                           ~~~~~~~^~~~~~~~~
In file included from /usr/include/c++/14/string:48,
                 from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_iterator.h:618:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr decltype ((__y.base() - __x.base())) std::operator-(const reverse_iterator<_Iterator>&, const reverse_iterator<_IteratorR>&)'
  618 |     operator-(const reverse_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:618:5: note:   template argument deduction/substitution failed:
/usr/include/c++/14/bits/stl_algo.h:1906:50: note:   'std::_Rb_tree_const_iterator<int>' is not derived from 'const std::reverse_iterator<_Iterator>'
 1906 |                                 std::__lg(__last - __first) * 2,
      |                                           ~~~~~~~^~~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1790:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr decltype ((__x.base() - __y.base())) std::operator-(const move_iterator<_IteratorL>&, const move_iterator<_IteratorR>&)'
 1790 |     operator-(const move_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1790:5: note:   template argument deduction/substitution failed:
/usr/include/c++/14/bits/stl_algo.h:1906:50: note:   'std::_Rb_tree_const_iterator<int>' is not derived from 'const std::move_iterator<_IteratorL>'
 1906 |                                 std::__lg(__last - __first) * 2,
      |                                           ~~~~~~~^~~~~~~~~