Language: C++

#include<bits/stdc++.h>
using namespace std;
string S[5000],T[5000],V[5000];int a[5000],b[5000],n,m,A,B,C,dist[5000];
vector<string>U;vector<pair<int,int>>x[500];
int dfs(int s,int g){
	for(int i=0;i<5000;i+)dist[i]=1<<30;
	dist[s]=0;
	for(int i=0;i<n;i++){
		for(int j=0;j<n;j++){
			for(int k=0;k<x[j].size();k++){
				dist[x[j][k].first]=min(dist[x[j][k].first],dist[j]+x[j][k].second);
			}
		}
	}
	return dist[g];
}
int main(){
	while(true){
		cin>>n>>m;for(int i=0;i<500;i++)x[i].clear();
		if(n==0){break;}U.clear();cin>>A>>B>>C;
		for(int i=0;i<m;i++){
			cin>>S[i]>>T[i]>>a[i]>>b[i];
			U.push_back(S[i]);U.push_back(T[i]);
		}
		sort(U.begin(),U.end());V[0]=U[0];int cnt=1,G,H,I;
		for(int i=1;i<U.size();i++){
			if(U[i]!=U[i-1]){V[cnt]=U[i];cnt++;}
		}
		for(int i=0;i<cnt;i++){
			if(A==V[i])G=j;
			if(B==V[i])H=j;
			if(C==V[i])I=j;
		}
		for(int i=0;i<m;i++){
			int s1=0,t1=0;
			for(int j=0;j<cnt;j++){
				if(S[i]==V[j])s1=j;
				if(T[i]==V[j])t1=j;
			}
			X[s1].push_back(make_pair(s2,a[i]/40+b[i]));
			X[s2].push_back(make_pair(s1,a[i]/40+b[i]));
		}
		cout<<dfs(G,H)+dfs(H,I)<<endl;
	}
	return 0;
}

Compiler output:
a.cc: In function 'int dfs(int, int)':
a.cc:6:30: error: expected primary-expression before ')' token
    6 |         for(int i=0;i<5000;i+)dist[i]=1<<30;
      |                              ^
a.cc: In function 'int main()':
a.cc:30:29: error: no match for 'operator==' (operand types are 'int' and 'std::string' {aka 'std::__cxx11::basic_string<char>'})
   30 |                         if(A==V[i])G=j;
      |                            ~^~~~~~
      |                            |     |
      |                            int   std::string {aka std::__cxx11::basic_string<char>}
In file included from /usr/include/c++/14/regex:68,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:181,
                 from a.cc:1:
/usr/include/c++/14/bits/regex.h:1103:5: note: candidate: 'template<class _BiIter> bool std::__cxx11::operator==(const sub_match<_BiIter>&, const sub_match<_BiIter>&)'
 1103 |     operator==(const sub_match<_BiIter>& __lhs, const sub_match<_BiIter>& __rhs)
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1103:5: note:   template argument deduction/substitution failed:
a.cc:30:34: note:   mismatched types 'const std::__cxx11::sub_match<_BiIter>' and 'int'
   30 |                         if(A==V[i])G=j;
      |                                  ^
/usr/include/c++/14/bits/regex.h:1199:5: note: candidate: 'template<class _Bi_iter, class _Ch_traits, class _Ch_alloc> bool std::__cxx11::operator==(__sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>&, const sub_match<_BiIter>&)'
 1199 |     operator==(const __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1199:5: note:   template argument deduction/substitution failed:
a.cc:30:34: note:   mismatched types 'std::__cxx11::__sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>' and 'int'
   30 |                         if(A==V[i])G=j;
      |                                  ^
/usr/include/c++/14/bits/regex.h:1274:5: note: candidate: 'template<class _Bi_iter, class _Ch_traits, class _Ch_alloc> bool std::__cxx11::operator==(const sub_match<_BiIter>&, __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>&)'
 1274 |     operator==(const sub_match<_Bi_iter>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1274:5: note:   template argument deduction/substitution failed:
a.cc:30:34: note:   mismatched types 'const std::__cxx11::sub_match<_BiIter>' and 'int'
   30 |                         if(A==V[i])G=j;
      |                                  ^
/usr/include/c++/14/bits/regex.h:1366:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator==(const typename std::iterator_traits<_Iter>::value_type*, const sub_match<_BiIter>&)'
 1366 |     operator==(typename iterator_traits<_Bi_iter>::value_type const* __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1366:5: note:   template argument deduction/substitution failed:
a.cc:30:34: note:   'std::string' {aka 'std::__cxx11::basic_string<char>'} is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   30 |                         if(A==V[i])G=j;
      |                                  ^
/usr/include/c++/14/bits/regex.h:1441:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator==(const sub_match<_BiIter>&, const typename std::iterator_traits<_Iter>::value_type*)'
 1441 |     operator==(const sub_match<_Bi_iter>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1441:5: note:   template argument deduction/substitution failed:
a.cc:30:34: note:   mismatched types 'const std::__cxx11::sub_match<_BiIter>' and 'int'
   30 |                         if(A==V[i])G=j;
      |                                  ^
/usr/include/c++/14/bits/regex.h:1534:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator==(const typename std::iterator_traits<_Iter>::value_type&, const sub_match<_BiIter>&)'
 1534 |     operator==(typename iterator_traits<_Bi_iter>::value_type const& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1534:5: note:   template argument deduction/substitution failed:
a.cc:30:34: note:   'std::string' {aka 'std::__cxx11::basic_string<char>'} is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   30 |                         if(A==V[i])G=j;
      |                                  ^
/usr/include/c++/14/bits/regex.h:1613:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator==(const sub_match<_BiIter>&, const typename std::iterator_traits<_Iter>::value_type&)'
 1613 |     operator==(const sub_match<_Bi_iter>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1613:5: note:   template argument deduction/substitution failed:
a.cc:30:34: note:   mismatched types 'const std::__cxx11::sub_match<_BiIter>' and 'int'
   30 |                         if(A==V[i])G=j;
      |                                  ^
/usr/include/c++/14/bits/regex.h:2186:5: note: candidate: 'template<class _Bi_iter, class _Alloc> bool std::__cxx11::operator==(const match_results<_BiIter, _Alloc>&, const match_results<_BiIter, _Alloc>&)'
 2186 |     operator==(const match_results<_Bi_iter, _Alloc>& __m1,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:2186:5: note:   template argument deduction/substitution failed:
a.cc:30:34: note:   mismatched types 'const std::__cxx11::match_results<_BiIter, _Alloc>' and 'int'
   30 |                         if(A==V[i])G=j;
      |                                  ^
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:
/usr/include/c++/14/bits/stl_pair.h:1033:5: note: candidate: 'template<class _T1, class _T2> constexpr bool std::operator==(const pair<_T1, _T2>&, const pair<_T1, _T2>&)'
 1033 |     operator==(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y)
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_pair.h:1033:5: note:   template argument deduction/substitution failed:
a.cc:30:34: note:   mismatched types 'const std::pair<_T1, _T2>' and 'int'
   30 |                         if(A==V[i])G=j;
      |                                  ^
In file included from /usr/include/c++/14/bits/stl_algobase.h:67:
/usr/include/c++/14/bits/stl_iterator.h:441:5: note: candidate: 'template<class _Iterator> constexpr bool std::operator==(const reverse_iterator<_Iterator>&, const reverse_iterator<_Iterator>&)'
  441 |     operator==(const reverse_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:441:5: note:   template argument deduction/substitution failed:
a.cc:30:34: note:   mismatched types 'const std::reverse_iterator<_Iterator>' and 'int'
   30 |                         if(A==V[i])G=j;
      |                                  ^
/usr/include/c++/14/bits/stl_iterator.h:486:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr bool std::operator==(const reverse_iterator<_Iterator>&, const reverse_iterator<_IteratorR>&)'
  486 |     operator==(const reverse_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:486:5: note:   template argument deduction/substitution failed:
a.cc:30:34: note:   mismatched types 'const std::reverse_iterator<_Iterator>' and 'int'
   30 |                         if(A==V[i])G=j;
      |                                  ^
/usr/include/c++/14/bits/stl_iterator.h:1667:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr bool std::operator==(const move_iterator<_IteratorL>&, const move_iterator<_IteratorR>&)'
 1667 |     operator==(const move_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1667:5: note:   template argument deduction/substitution failed:
a.cc:30:34: note:   mismatched types 'const std::move_iterator<_IteratorL>' and 'int'
   30 |                         if(A==V[i])G=j;
      |                                  ^
/usr/include/c++/14/bits/stl_iterator.h:1737:5: note: candidate: 'template<class _Iterator> constexpr bool std::operator==(const move_iterator<_IteratorL>&, const move_iterator<_IteratorL>&)'
 1737 |     operator==(const move_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1737:5: note:   template argument deduction/substitution failed:
a.cc:30:34: note:   mismatched types 'const std::move_iterator<_IteratorL>' and 'int'
   30 |                         if(A==V[i])G=j;
      |                                  ^
In file included from /usr/include/c++/14/bits/char_traits.h:42,
                 from /usr/include/c++/14/string:42,
                 from /usr/include/c++/14/bitset:52,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:52:
/usr/include/c++/14/bits/postypes.h:192:5: note: candidate: 'template<class _StateT> bool std::operator==(const fpos<_StateT>&, const fpos<_StateT>&)'
  192 |     operator==(const fpos<_StateT>& __lhs, const fpos<_StateT>& __rhs)
      |     ^~~~~~~~
/usr/include/c++/14/bits/postypes.h:192:5: note:   template argument deduction/substitution failed:
a.cc:30:34: note:   mismatched types 'const std::fpos<_StateT>' and 'int'
   30 |                         if(A==V[i])G=j;
      |                                  ^
In file included from /usr/include/c++/14/string:43:
/usr/include/c++/14/bits/allocator.h:235:5: note: candidate: 'template<class _T1, class _T2> bool std::operator==(const allocator<_CharT>&, const allocator<_T2>&)'
  235 |     operator==(const allocator<_T1>&, const allocator<_T2>&)
      |     ^~~~~~~~
/usr/include/c++/14/bits/allocator.h:235:5: note:   template argument deduction/substitution failed:
a.cc:30:34: note:   mismatched types 'const std::allocator<_CharT>' and 'int'
   30 |                         if(A==V[i])G=j;
      |                                  ^
In file included from /usr/include/c++/14/bits/basic_string.h:47,
                 from /usr/include/c++/14/string:54:
/usr/include/c++/14/string_view:629:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator==(basic_string_view<_CharT, _Traits>, __type_identity_t<basic_string_view<_CharT, _Traits> >)'
  629 |