Language: C++

#include<bits/stdc++.h>
using namespace std;

int main(){
  int n,q,y;
  string x;
  cin >> n >> q;
  queue<pair<string,int> > a;
  pair<string,int> b;
  for(int i=0;i<n;i++){
    cin >> b.first >> b.second;
    a.push(b);
  }
  while(! a.empty()){
    b=a.front();
    if(b.second<=q){
      b=a
      cout << b.first << ' ' << b.second << endl;
    }
    else{
      b.first=b.first;
      b.secoond=b.second-q;
}
  }
}
    


Compiler output:
a.cc: In function 'int main()':
a.cc:17:9: error: no match for 'operator=' (operand types are 'std::pair<std::__cxx11::basic_string<char>, int>' and 'std::queue<std::pair<std::__cxx11::basic_string<char>, int> >')
   17 |       b=a
      |         ^
In file included from /usr/include/c++/14/bits/stl_algobase.h:64,
                 from /usr/include/c++/14/algorithm:60,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_pair.h:946:9: note: candidate: 'template<class _U1, class _U2> typename std::enable_if<std::__and_<std::is_assignable<_T1&, const _U1&>, std::is_assignable<_T2&, const _U2&> >::value, std::pair<_T1, _T2>&>::type std::pair<_T1, _T2>::operator=(const std::pair<_U1, _U2>&) [with _U2 = _U1; _T1 = std::__cxx11::basic_string<char>; _T2 = int]'
  946 |         operator=(const pair<_U1, _U2>& __p)
      |         ^~~~~~~~
/usr/include/c++/14/bits/stl_pair.h:946:9: note:   template argument deduction/substitution failed:
a.cc:17:9: note:   'std::queue<std::pair<std::__cxx11::basic_string<char>, int> >' is not derived from 'const std::pair<_T1, _T2>'
   17 |       b=a
      |         ^
/usr/include/c++/14/bits/stl_pair.h:957:9: note: candidate: 'template<class _U1, class _U2> typename std::enable_if<std::__and_<std::is_assignable<_T1&, _U1&&>, std::is_assignable<_T2&, _U2&&> >::value, std::pair<_T1, _T2>&>::type std::pair<_T1, _T2>::operator=(std::pair<_U1, _U2>&&) [with _U2 = _U1; _T1 = std::__cxx11::basic_string<char>; _T2 = int]'
  957 |         operator=(pair<_U1, _U2>&& __p)
      |         ^~~~~~~~
/usr/include/c++/14/bits/stl_pair.h:957:9: note:   template argument deduction/substitution failed:
a.cc:17:9: note:   'std::queue<std::pair<std::__cxx11::basic_string<char>, int> >' is not derived from 'std::pair<_T1, _T2>'
   17 |       b=a
      |         ^
/usr/include/c++/14/bits/stl_pair.h:921:7: note: candidate: 'std::pair<_T1, _T2>& std::pair<_T1, _T2>::operator=(std::__conditional_t<((bool)std::__and_<std::is_copy_assignable<_T1>, std::is_copy_assignable<_T2> >::value), const std::pair<_T1, _T2>&, const std::__nonesuch&>) [with _T1 = std::__cxx11::basic_string<char>; _T2 = int; std::__conditional_t<((bool)std::__and_<std::is_copy_assignable<_T1>, std::is_copy_assignable<_T2> >::value), const std::pair<_T1, _T2>&, const std::__nonesuch&> = const std::pair<std::__cxx11::basic_string<char>, int>&]'
  921 |       operator=(__conditional_t<__and_<is_copy_assignable<_T1>,
      |       ^~~~~~~~
/usr/include/c++/14/bits/stl_pair.h:923:65: note:   no known conversion for argument 1 from 'std::queue<std::pair<std::__cxx11::basic_string<char>, int> >' to 'std::__conditional_t<true, const std::pair<std::__cxx11::basic_string<char>, int>&, const std::__nonesuch&>' {aka 'const std::pair<std::__cxx11::basic_string<char>, int>&'}
  921 |       operator=(__conditional_t<__and_<is_copy_assignable<_T1>,
      |                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~  
  922 |                                        is_copy_assignable<_T2>>::value,
      |                                        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  923 |                                 const pair&, const __nonesuch&> __p)
      |                                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
/usr/include/c++/14/bits/stl_pair.h:931:7: note: candidate: 'std::pair<_T1, _T2>& std::pair<_T1, _T2>::operator=(std::__conditional_t<((bool)std::__and_<std::is_move_assignable<_Tp>, std::is_move_assignable<_T2> >::value), std::pair<_T1, _T2>&&, std::__nonesuch&&>) [with _T1 = std::__cxx11::basic_string<char>; _T2 = int; std::__conditional_t<((bool)std::__and_<std::is_move_assignable<_Tp>, std::is_move_assignable<_T2> >::value), std::pair<_T1, _T2>&&, std::__nonesuch&&> = std::pair<std::__cxx11::basic_string<char>, int>&&]'
  931 |       operator=(__conditional_t<__and_<is_move_assignable<_T1>,
      |       ^~~~~~~~
/usr/include/c++/14/bits/stl_pair.h:933:55: note:   no known conversion for argument 1 from 'std::queue<std::pair<std::__cxx11::basic_string<char>, int> >' to 'std::__conditional_t<true, std::pair<std::__cxx11::basic_string<char>, int>&&, std::__nonesuch&&>' {aka 'std::pair<std::__cxx11::basic_string<char>, int>&&'}
  931 |       operator=(__conditional_t<__and_<is_move_assignable<_T1>,
      |                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  932 |                                        is_move_assignable<_T2>>::value,
      |                                        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  933 |                                 pair&&, __nonesuch&&> __p)
      |                                 ~~~~~~~~~~~~~~~~~~~~~~^~~
a.cc:22:9: error: 'struct std::pair<std::__cxx11::basic_string<char>, int>' has no member named 'secoond'; did you mean 'second'?
   22 |       b.secoond=b.second-q;
      |         ^~~~~~~
      |         second