Language: C++

#include<iostream>
#include<string>
#include<algorithm>
#include<vector>
#include<array>
#include<queue>
#include<bitset>
#include<cmath>

using namespace std;

#define square(s) ((s)*(s))
#define scast(type,e) static_cast<type>(e)
#define rep(i,n) for(decltype(n) i = 0; i < n;i++)
#define repp(i,s,u) for(decltype(s) i = s; i < u;i++)
#define range(a) a.begin(),a.end()
#define pr(l,r) make_pair((l),(r))
#define INF (1145141919)


template<class T>
using vec = vector<T>;
template<class T,size_t S>
using arr = array<T,S>;
template<class T1,class T2>
using pr = pair<T1, T2>;

using ll = long long;
using ull = unsigned long long;

template<class T>
void chmax(T& dest, const T& target) {
	dest = max(dest, target);
}
template<class T>
void chmin(T& dest, const T& with) {
	dest = min(dest, with);
}


struct edge {
	int to;
	ll dist;
	edge(int t,ll d) : to(t),dist(d){}
};
bool operator<(const edge& l,const edge& r) {
	return l.dist < r.dist;
}
bool operator>(const edge& l, const edge& r) {
	return l.dist > r.dist;
}

struct edge_dist {
	ll dist;
	ll fuel;
	int refueled;
};

int main(){
	int N, M;
	ll L;
	cin >> N >> M >> L;
	


	vec<vec<edge>> g(N);//隣接リスト
	rep(i, M) {
		int A, B, C;
		cin >> A >> B >> C;
		
		g[A - 1].emplace_back(B - 1, C);
		g[B - 1].emplace_back(A - 1, C);
	}

	vec<vec<edge_dist>> dist(N, vec<edge_dist>(N));

	rep(s, N) {
		fill(range(dist[s]), edge_dist{1145141919,0,-1});

		priority_queue<edge,vec<edge>,greater<edge>> que;
		que.push(edge{ s,0 });

		dist[s][s] = edge_dist{0,L,0};
		while (!que.empty()) {
			auto e = que.top(); que.pop();

			for (auto i : g[e.to]) {
				if (dist[s][i.to].dist > dist[s][e.to].dist + i.dist) {
					dist[s][i.to].dist = dist[s][e.to].dist + i.dist;
					dist[s][i.to].fuel = dist[s][e.to].fuel - i.dist;
					dist[s][i.to].refueled = dist[s][e.to].refueled;
					if (dist[s][i.to].fuel < 0) {
						dist[s][i.to].fuel = L - g[e.to][i.to];
						dist[s][i.to].refueled++;
					}
					que.push(edge{ i.to,dist[s][i.to].dist });
				}
			}
		}
	}

	int Q;
	cin >> Q;
	vec<int> output;
	rep(i, Q) {
		int s, t;
		cin >> s >> t;
		if (dist[s - 1][t - 1].dist == 1145141919)output.push_back(-1);
		else output.push_back(dist[s - 1][t - 1].refueled);
	}
	for(auto i : output)
		cout << i << endl;


	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:93:72: error: no match for 'operator-' (operand types are 'll' {aka 'long long int'} and '__gnu_cxx::__alloc_traits<std::allocator<edge>, edge>::value_type' {aka 'edge'})
   93 |                                                 dist[s][i.to].fuel = L - g[e.to][i.to];
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:
a.cc:93:86: note:   mismatched types 'const std::reverse_iterator<_Iterator>' and 'll' {aka 'long long int'}
   93 |                                                 dist[s][i.to].fuel = L - g[e.to][i.to];
      |                                                                                      ^
/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:
a.cc:93:86: note:   mismatched types 'const std::move_iterator<_IteratorL>' and 'll' {aka 'long long int'}
   93 |                                                 dist[s][i.to].fuel = L - g[e.to][i.to];
      |                                                                                      ^