Language: C++

#include<bits/stdc++.h>
 
#define REP(i,s,N) for (int i=s;i<(N); ++i)
#define ALL(x) (x).begin(), (x).end()
typedef long long ll;
using namespace std;
#define MAX 1000000000;

ll ans=0;

	void f(ll from, ll volume, ll N){
		REP(i,0,N){ll ho[i]=MAX;}
		for(auto p : path[from]){
			if(p.second<=volume){
				f(p.first,volume-p.second);
			}else if(p.second>volume && p.second <= L){
				f(p.first,L-p.second);
				ho[p.first]=ho[from]+1;
			}else{
				continue;
			}
		}
	}

int main(){
	ll N,M,L;
	cin >> N >> M >> L;
	//ll L[N];
	ll A_in,B_in,C_in;
	ll A[M],B[M],C[M];
	vector<vector<pair<ll,ll>> path;
	
	REP(i,0,M){
		cin >> A_in >> B_in >> C_in;
		path[A_in] = make_pair(B_in,C_in);
	}
	
	ll Q;
	cin >> Q;
	ll s_in,t_in;
	ll s[Q],t[Q];
	REP(i,0,Q){
		cin >> s_in >> t_in;
		void f(s_in,L,N);
		if(ho[t_in]!=MAX){
		cout << ho[t_in] << endl;
		}else{
			cout << -1 < endl;
	}

	return 0;
}

Compiler output:
a.cc: In function 'void f(ll, ll, ll)':
a.cc:7:13: error: array must be initialized with a brace-enclosed initializer
    7 | #define MAX 1000000000;
      |             ^~~~~~~~~~
a.cc:12:37: note: in expansion of macro 'MAX'
   12 |                 REP(i,0,N){ll ho[i]=MAX;}
      |                                     ^~~
a.cc:13:30: error: 'path' was not declared in this scope; did you mean 'std::filesystem::__cxx11::path'?
   13 |                 for(auto p : path[from]){
      |                              ^~~~
      |                              std::filesystem::__cxx11::path
In file included from /usr/include/c++/14/filesystem:52,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:200,
                 from a.cc:1:
/usr/include/c++/14/bits/fs_path.h:293:9: note: 'std::filesystem::__cxx11::path' declared here
  293 |   class path
      |         ^~~~
a.cc:16:65: error: 'L' was not declared in this scope
   16 |                         }else if(p.second>volume && p.second <= L){
      |                                                                 ^
a.cc:18:33: error: 'ho' was not declared in this scope
   18 |                                 ho[p.first]=ho[from]+1;
      |                                 ^~
a.cc: In function 'int main()':
a.cc:31:36: error: template argument 1 is invalid
   31 |         vector<vector<pair<ll,ll>> path;
      |                                    ^~~~
a.cc:31:36: error: template argument 2 is invalid
a.cc:35:17: error: 'path' was not declared in this scope; did you mean 'std::filesystem::__cxx11::path'?
   35 |                 path[A_in] = make_pair(B_in,C_in);
      |                 ^~~~
      |                 std::filesystem::__cxx11::path
/usr/include/c++/14/bits/fs_path.h:293:9: note: 'std::filesystem::__cxx11::path' declared here
  293 |   class path
      |         ^~~~
a.cc:44:22: error: variable or field 'f' declared void
   44 |                 void f(s_in,L,N);
      |                      ^
a.cc:45:20: error: 'ho' was not declared in this scope
   45 |                 if(ho[t_in]!=MAX){
      |                    ^~
a.cc:45:33: error: expected primary-expression before ')' token
   45 |                 if(ho[t_in]!=MAX){
      |                                 ^
a.cc:48:36: error: no match for 'operator<' (operand types are 'std::basic_ostream<char>' and '<unresolved overloaded function type>')
   48 |                         cout << -1 < endl;
      |                         ~~~~~~~~~~~^~~~~~
In file included from /usr/include/c++/14/regex:68,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:181:
/usr/include/c++/14/bits/regex.h:1143:5: note: candidate: 'template<class _BiIter> bool std::__cxx11::operator<(const sub_match<_BiIter>&, const sub_match<_BiIter>&)'
 1143 |     operator<(const sub_match<_BiIter>& __lhs, const sub_match<_BiIter>& __rhs)
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1143:5: note:   template argument deduction/substitution failed:
a.cc:48:38: note:   'std::basic_ostream<char>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   48 |                         cout << -1 < endl;
      |                                      ^~~~
/usr/include/c++/14/bits/regex.h:1224:5: 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>&)'
 1224 |     operator<(const __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1224:5: note:   template argument deduction/substitution failed:
a.cc:48:38: note:   'std::basic_ostream<char>' is not derived from 'std::__cxx11::__sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>'
   48 |                         cout << -1 < endl;
      |                                      ^~~~
/usr/include/c++/14/bits/regex.h:1317:5: 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>&)'
 1317 |     operator<(const sub_match<_Bi_iter>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1317:5: note:   template argument deduction/substitution failed:
a.cc:48:38: note:   'std::basic_ostream<char>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   48 |                         cout << -1 < endl;
      |                                      ^~~~
/usr/include/c++/14/bits/regex.h:1391:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator<(const typename std::iterator_traits<_Iter>::value_type*, const sub_match<_BiIter>&)'
 1391 |     operator<(typename iterator_traits<_Bi_iter>::value_type const* __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1391:5: note:   template argument deduction/substitution failed:
a.cc:48:38: note:   couldn't deduce template parameter '_Bi_iter'
   48 |                         cout << -1 < endl;
      |                                      ^~~~
/usr/include/c++/14/bits/regex.h:1485:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator<(const sub_match<_BiIter>&, const typename std::iterator_traits<_Iter>::value_type*)'
 1485 |     operator<(const sub_match<_Bi_iter>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1485:5: note:   template argument deduction/substitution failed:
a.cc:48:38: note:   'std::basic_ostream<char>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   48 |                         cout << -1 < endl;
      |                                      ^~~~
/usr/include/c++/14/bits/regex.h:1560:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator<(const typename std::iterator_traits<_Iter>::value_type&, const sub_match<_BiIter>&)'
 1560 |     operator<(typename iterator_traits<_Bi_iter>::value_type const& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1560:5: note:   template argument deduction/substitution failed:
a.cc:48:38: note:   couldn't deduce template parameter '_Bi_iter'
   48 |                         cout << -1 < endl;
      |                                      ^~~~
/usr/include/c++/14/bits/regex.h:1660:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator<(const sub_match<_BiIter>&, const typename std::iterator_traits<_Iter>::value_type&)'
 1660 |     operator<(const sub_match<_Bi_iter>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1660:5: note:   template argument deduction/substitution failed:
a.cc:48:38: note:   'std::basic_ostream<char>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   48 |                         cout << -1 < endl;
      |                                      ^~~~
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:1045:5: note: candidate: 'template<class _T1, class _T2> constexpr bool std::operator<(const pair<_T1, _T2>&, const pair<_T1, _T2>&)'
 1045 |     operator<(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y)
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_pair.h:1045:5: note:   template argument deduction/substitution failed:
a.cc:48:38: note:   'std::basic_ostream<char>' is not derived from 'const std::pair<_T1, _T2>'
   48 |                         cout << -1 < endl;
      |                                      ^~~~
In file included from /usr/include/c++/14/bits/stl_algobase.h:67:
/usr/include/c++/14/bits/stl_iterator.h:448:5: note: candidate: 'template<class _Iterator> constexpr bool std::operator<(const reverse_iterator<_Iterator>&, const reverse_iterator<_Iterator>&)'
  448 |     operator<(const reverse_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:448:5: note:   template argument deduction/substitution failed:
a.cc:48:38: note:   'std::basic_ostream<char>' is not derived from 'const std::reverse_iterator<_Iterator>'
   48 |                         cout << -1 < endl;
      |                                      ^~~~
/usr/include/c++/14/bits/stl_iterator.h:493:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr bool std::operator<(const reverse_iterator<_Iterator>&, const reverse_iterator<_IteratorR>&)'
  493 |     operator<(const reverse_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:493:5: note:   template argument deduction/substitution failed:
a.cc:48:38: note:   'std::basic_ostream<char>' is not derived from 'const std::reverse_iterator<_Iterator>'
   48 |                         cout << -1 < endl;
      |                                      ^~~~
/usr/include/c++/14/bits/stl_iterator.h:1694:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr bool std::operator<(const move_iterator<_IteratorL>&, const move_iterator<_IteratorR>&)'
 1694 |     operator<(const move_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1694:5: note:   template argument deduction/substitution failed:
a.cc:48:38: note:   'std::basic_ostream<char>' is not derived from 'const std::move_iterator<_IteratorL>'
   48 |                         cout << -1 < endl;
      |                                      ^~~~
/usr/include/c++/14/bits/stl_iterator.h:1760:5: note: candidate: 'template<class _Iterator> constexpr bool std::operator<(const move_iterator<_IteratorL>&, const move_iterator<_IteratorL>&)'
 1760 |     operator<(const move_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1760:5: note:   template argument deduction/substitution failed:
a.cc:48:38: note:   'std::basic_ostream<char>' is not derived from 'const std::move_iterator<_IteratorL>'
   48 |                         cout << -1 < endl;
      |                                      ^~~~
In file included from /usr/include/c++/14/bits/basic_string.h:47,
                 from /usr/include/c++/14/string:54,
                 from /usr/include/c++/14/bitset:52,
                 from /usr/include/x86_64-