Language: C++

#include <cstdio>
#include <iostream>
#include <set>
#include <map>
#include <vector>
#include <algorithm>
#include <utility>
#include <string>
#include <cmath>
#include <iomanip>
typedef long long ll;
using namespace std;
ll intpow(ll N, ll P){
    if(P==0) return 1;
    if(P%2==0){
        ll t = intpow(N, P/2);
        return t*t;
    }
    return N * intpow(N, P-1);
}
ll gcd(ll n,ll m){
    n = max(n,m);
    m = min(n,m);
    if(n%m == 0)return m;
    return gcd(m,n%m);
}
ll lcm(ll n,ll m){
    return n*m/gcd(n,m);
}
int main(){
    int n,m,p,y;
    cin >> n >> m;
    vector<vector<int>>memo;
    vector<set<int>>a;
    a.resize(n+1);
    memo.resize(m);
    for(int i=0;i<m;i++){
        memo[i].push_back(0);
        memo[i].push_back(0);
    }
    for(int i=0;i<m;i++){
        cin >> p >> y;
        memo[i][0]=p;
        memo[i][1]=y;
        a[p].insert(y);
    }
    for(int i=0;i<m;i++){
        memo[i][1]=distance(a[memo[i][0]].begin(),lower_bound(a[memo[i][0]].begin(),a[memo[i][0]].end(),a[memo[i][1]])+1;
    }
    for(int i=0;i<m;i++)cout << setw(6) << setfill('0') << memo[i][0]<< setw(6) << setfill('0') << memo[i][1] << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:48:119: error: no match for 'operator+' (operand types are 'std::_Rb_tree_const_iterator<int>' and 'int')
   48 |         memo[i][1]=distance(a[memo[i][0]].begin(),lower_bound(a[memo[i][0]].begin(),a[memo[i][0]].end(),a[memo[i][1]])+1;
      |                                                   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~
      |                                                              |                                                         |
      |                                                              std::_Rb_tree_const_iterator<int>                         int
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:2:
/usr/include/c++/14/bits/stl_iterator.h:627:5: note: candidate: 'template<class _Iterator> constexpr std::reverse_iterator<_Iterator> std::operator+(typename reverse_iterator<_Iterator>::difference_type, const reverse_iterator<_Iterator>&)'
  627 |     operator+(typename reverse_iterator<_Iterator>::difference_type __n,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:627:5: note:   template argument deduction/substitution failed:
a.cc:48:120: note:   mismatched types 'const std::reverse_iterator<_Iterator>' and 'int'
   48 |         memo[i][1]=distance(a[memo[i][0]].begin(),lower_bound(a[memo[i][0]].begin(),a[memo[i][0]].end(),a[memo[i][1]])+1;
      |                                                                                                                        ^
/usr/include/c++/14/bits/stl_iterator.h:1798:5: note: candidate: 'template<class _Iterator> constexpr std::move_iterator<_IteratorL> std::operator+(typename move_iterator<_IteratorL>::difference_type, const move_iterator<_IteratorL>&)'
 1798 |     operator+(typename move_iterator<_Iterator>::difference_type __n,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1798:5: note:   template argument deduction/substitution failed:
a.cc:48:120: note:   mismatched types 'const std::move_iterator<_IteratorL>' and 'int'
   48 |         memo[i][1]=distance(a[memo[i][0]].begin(),lower_bound(a[memo[i][0]].begin(),a[memo[i][0]].end(),a[memo[i][1]])+1;
      |                                                                                                                        ^
In file included from /usr/include/c++/14/string:54:
/usr/include/c++/14/bits/basic_string.h:3598:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(const __cxx11::basic_string<_CharT, _Traits, _Allocator>&, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 3598 |     operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3598:5: note:   template argument deduction/substitution failed:
a.cc:48:120: note:   'std::_Rb_tree_const_iterator<int>' is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
   48 |         memo[i][1]=distance(a[memo[i][0]].begin(),lower_bound(a[memo[i][0]].begin(),a[memo[i][0]].end(),a[memo[i][1]])+1;
      |                                                                                                                        ^
/usr/include/c++/14/bits/basic_string.h:3616:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(const _CharT*, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 3616 |     operator+(const _CharT* __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3616:5: note:   template argument deduction/substitution failed:
a.cc:48:120: note:   mismatched types 'const _CharT*' and 'std::_Rb_tree_const_iterator<int>'
   48 |         memo[i][1]=distance(a[memo[i][0]].begin(),lower_bound(a[memo[i][0]].begin(),a[memo[i][0]].end(),a[memo[i][1]])+1;
      |                                                                                                                        ^
/usr/include/c++/14/bits/basic_string.h:3635:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(_CharT, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 3635 |     operator+(_CharT __lhs, const basic_string<_CharT,_Traits,_Alloc>& __rhs)
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3635:5: note:   template argument deduction/substitution failed:
a.cc:48:120: note:   mismatched types 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>' and 'int'
   48 |         memo[i][1]=distance(a[memo[i][0]].begin(),lower_bound(a[memo[i][0]].begin(),a[memo[i][0]].end(),a[memo[i][1]])+1;
      |                                                                                                                        ^
/usr/include/c++/14/bits/basic_string.h:3652:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(const __cxx11::basic_string<_CharT, _Traits, _Allocator>&, const _CharT*)'
 3652 |     operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3652:5: note:   template argument deduction/substitution failed:
a.cc:48:120: note:   'std::_Rb_tree_const_iterator<int>' is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
   48 |         memo[i][1]=distance(a[memo[i][0]].begin(),lower_bound(a[memo[i][0]].begin(),a[memo[i][0]].end(),a[memo[i][1]])+1;
      |                                                                                                                        ^
/usr/include/c++/14/bits/basic_string.h:3670:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(const __cxx11::basic_string<_CharT, _Traits, _Allocator>&, _CharT)'
 3670 |     operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs, _CharT __rhs)
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3670:5: note:   template argument deduction/substitution failed:
a.cc:48:120: note:   'std::_Rb_tree_const_iterator<int>' is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
   48 |         memo[i][1]=distance(a[memo[i][0]].begin(),lower_bound(a[memo[i][0]].begin(),a[memo[i][0]].end(),a[memo[i][1]])+1;
      |                                                                                                                        ^
/usr/include/c++/14/bits/basic_string.h:3682:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(__cxx11::basic_string<_CharT, _Traits, _Allocator>&&, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 3682 |     operator+(basic_string<_CharT, _Traits, _Alloc>&& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3682:5: note:   template argument deduction/substitution failed:
a.cc:48:120: note:   'std::_Rb_tree_const_iterator<int>' is not derived from 'std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
   48 |         memo[i][1]=distance(a[memo[i][0]].begin(),lower_bound(a[memo[i][0]].begin(),a[memo[i][0]].end(),a[memo[i][1]])+1;
      |                                                                                                                        ^
/usr/include/c++/14/bits/basic_string.h:3689:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(const __cxx11::basic_string<_CharT, _Traits, _Allocator>&, __cxx11::basic_string<_CharT, _Traits, _Allocator>&&)'
 3689 |     operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3689:5: note:   template argument deduction/substitution failed:
a.cc:48:120: note:   'std::_Rb_tree_const_iterator<int>' is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
   48 |         memo[i][1]=distance(a[memo[i][0]].begin(),lower_bound(a[memo[i][0]].begin(),a[memo[i][0]].end(),a[memo[i][1]])+1;
      |                                                                                                                        ^
/usr/include/c++/14/bits/basic_string.h:3696:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(__cxx11::basic_string<_CharT, _Traits, _Allocator>&&, __cxx11::basic_string<_CharT, _Traits, _Allocator>&&)'
 3696 |     operator+(basic_string<_CharT, _Traits, _Alloc>&& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3696:5: note:   template argument deduction/substitution failed:
a.cc:48:120: note:   'std::_Rb_tree_const_iterator<int>' is not derived from 'std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
   48 |         memo[i][1]=distance(a[memo[i][0]].begin(),lower_bound(a[memo[i][0]].begin(),a[memo[i][0]].end(),a[memo[i][1]])+1;
      |                                                                                                                        ^
/usr/include/c++/14/bits/basic_string.h:3719:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(const _CharT*, __cxx11::basic_string<_CharT, _Traits, _Allocator>&&)'
 3719 |     operator+(const _CharT* __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3719:5: note:   template argument deduction/substitution failed:
a.cc:48:120: note:   mismatched types 'const _CharT*' and 'std::_Rb_tree_const_iterator<int>'
   48 |         memo[i][1]=distance(a[memo[i][0]].begin(),lower_bound(a[memo[i][0]].begin(),a[memo[i