Language: C++

#define _CRT_SECURE_NO_WARNINGS

#include <stdio.h>
#include <string.h>
#include <algorithm>
#include <set>
#include <map>
#include <vector>
#include <math.h>
#include <cmath>
#include <queue>
#include <stack>
#include <list>
#include <functional>
#include <numeric>
#include <iostream>
#include <string>
#include <time.h>
#include <bitset>

using namespace std;
typedef long long ll;
#define rep(i, n) for (ll i = 0; i < (n); ++i)
#define all(x) (x).begin(),(x).end()
ll GCD(ll a, ll b) { return b ? GCD(b, a % b) : a; }


ll N, M, L, A[112345], B[112345], C[112345], Q, s[112345], t[112345];
vector<vector<pair<ll, ll>>> Edge;

int main() {

	scanf("%lld%lld%lld", &N, &M, &L);
	rep(i, M) scanf("%lld%lld%lld", &A[i], &B[i], &C[i]);
	scanf("%lld", &Q);
	rep(i, Q) scanf("%lld%lld", &s[i], &t[i]);

	Edge.resize(N);
	rep(i, M) {
		Edge[A[i] - 1].push_back({ B[i] - 1, C[i] });
		Edge[B[i] - 1].push_back({ A[i] - 1, C[i] });
	}

	vector<vector<pair<ll, ll>>> costs(N, vector<pair<ll, ll>>(N, { LLONG_MAX, -L })); //times, l
	rep(i, N) {
		priority_queue<pair<pair<ll, ll>, ll>, vector<pair<pair<ll, ll>, ll>>, greater<>> pq;
		pq.push({ {0, -L}, i });
		costs[i][i] = { 0, -L };
		while (!pq.empty()) {
			auto cur = pq.top().second;
			pq.pop();

			for (auto e : Edge[cur]) {
				auto n = costs[i][cur];
				if (n.second + e.second > 0) {
					++n.first;
					n.second = -L + e.second;
					if (n.second > 0) continue;
				}
				else {
					n.second += e.second;
				}
				if (costs[i][e.first] > n) {
					costs[i][e.first] = n;
					pq.push({ n, e.first });
				}
			}
		}
	}

	rep(q, Q) {
		if (costs[s[q] - 1][t[q] - 1].first != LLONG_MAX)
			printf("%lld\n", costs[s[q] - 1][t[q] - 1].first);
		else
			printf("-1\n");
	}

	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:44:73: error: 'LLONG_MAX' was not declared in this scope
   44 |         vector<vector<pair<ll, ll>>> costs(N, vector<pair<ll, ll>>(N, { LLONG_MAX, -L })); //times, l
      |                                                                         ^~~~~~~~~
a.cc:20:1: note: 'LLONG_MAX' is defined in header '<climits>'; this is probably fixable by adding '#include <climits>'
   19 | #include <bitset>
  +++ |+#include <climits>
   20 | 
a.cc:44:88: error: no matching function for call to 'std::vector<std::pair<long long int, long long int> >::vector(ll&, <brace-enclosed initializer list>)'
   44 |         vector<vector<pair<ll, ll>>> costs(N, vector<pair<ll, ll>>(N, { LLONG_MAX, -L })); //times, l
      |                                                                                        ^
In file included from /usr/include/c++/14/vector:66,
                 from a.cc:8:
/usr/include/c++/14/bits/stl_vector.h:707:9: note: candidate: 'template<class _InputIterator, class> std::vector<_Tp, _Alloc>::vector(_InputIterator, _InputIterator, const allocator_type&) [with <template-parameter-2-2> = _InputIterator; _Tp = std::pair<long long int, long long int>; _Alloc = std::allocator<std::pair<long long int, long long int> >]'
  707 |         vector(_InputIterator __first, _InputIterator __last,
      |         ^~~~~~
/usr/include/c++/14/bits/stl_vector.h:707:9: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/14/bits/stl_algobase.h:65,
                 from /usr/include/c++/14/algorithm:60,
                 from a.cc:5:
/usr/include/c++/14/bits/stl_iterator_base_types.h: In substitution of 'template<class _InIter> using std::_RequireInputIter = std::__enable_if_t<((bool)std::is_convertible<typename std::iterator_traits< <template-parameter-1-1> >::iterator_category, std::input_iterator_tag>::value)> [with _InIter = long long int]':
/usr/include/c++/14/bits/stl_vector.h:705:9:   required from here
  705 |                typename = std::_RequireInputIter<_InputIterator>>
      |                ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator_base_types.h:252:57: error: no type named 'iterator_category' in 'struct std::iterator_traits<long long int>'
  252 |                                    input_iterator_tag>::value>;
      |                                                         ^~~~~
/usr/include/c++/14/bits/stl_vector.h:678:7: note: candidate: 'std::vector<_Tp, _Alloc>::vector(std::initializer_list<_Tp>, const allocator_type&) [with _Tp = std::pair<long long int, long long int>; _Alloc = std::allocator<std::pair<long long int, long long int> >; allocator_type = std::allocator<std::pair<long long int, long long int> >]'
  678 |       vector(initializer_list<value_type> __l,
      |       ^~~~~~
/usr/include/c++/14/bits/stl_vector.h:678:43: note:   no known conversion for argument 1 from 'll' {aka 'long long int'} to 'std::initializer_list<std::pair<long long int, long long int> >'
  678 |       vector(initializer_list<value_type> __l,
      |              ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
/usr/include/c++/14/bits/stl_vector.h:659:7: note: candidate: 'std::vector<_Tp, _Alloc>::vector(std::vector<_Tp, _Alloc>&&, std::__type_identity_t<_Alloc>&) [with _Tp = std::pair<long long int, long long int>; _Alloc = std::allocator<std::pair<long long int, long long int> >; std::__type_identity_t<_Alloc> = std::allocator<std::pair<long long int, long long int> >]'
  659 |       vector(vector&& __rv, const __type_identity_t<allocator_type>& __m)
      |       ^~~~~~
/usr/include/c++/14/bits/stl_vector.h:659:23: note:   no known conversion for argument 1 from 'll' {aka 'long long int'} to 'std::vector<std::pair<long long int, long long int> >&&'
  659 |       vector(vector&& __rv, const __type_identity_t<allocator_type>& __m)
      |              ~~~~~~~~~^~~~
/usr/include/c++/14/bits/stl_vector.h:640:7: note: candidate: 'std::vector<_Tp, _Alloc>::vector(std::vector<_Tp, _Alloc>&&, const allocator_type&, std::false_type) [with _Tp = std::pair<long long int, long long int>; _Alloc = std::allocator<std::pair<long long int, long long int> >; allocator_type = std::allocator<std::pair<long long int, long long int> >; std::false_type = std::false_type]'
  640 |       vector(vector&& __rv, const allocator_type& __m, false_type)
      |       ^~~~~~
/usr/include/c++/14/bits/stl_vector.h:640:7: note:   candidate expects 3 arguments, 2 provided
/usr/include/c++/14/bits/stl_vector.h:635:7: note: candidate: 'std::vector<_Tp, _Alloc>::vector(std::vector<_Tp, _Alloc>&&, const allocator_type&, std::true_type) [with _Tp = std::pair<long long int, long long int>; _Alloc = std::allocator<std::pair<long long int, long long int> >; allocator_type = std::allocator<std::pair<long long int, long long int> >; std::true_type = std::true_type]'
  635 |       vector(vector&& __rv, const allocator_type& __m, true_type) noexcept
      |       ^~~~~~
/usr/include/c++/14/bits/stl_vector.h:635:7: note:   candidate expects 3 arguments, 2 provided
/usr/include/c++/14/bits/stl_vector.h:624:7: note: candidate: 'std::vector<_Tp, _Alloc>::vector(const std::vector<_Tp, _Alloc>&, std::__type_identity_t<_Alloc>&) [with _Tp = std::pair<long long int, long long int>; _Alloc = std::allocator<std::pair<long long int, long long int> >; std::__type_identity_t<_Alloc> = std::allocator<std::pair<long long int, long long int> >]'
  624 |       vector(const vector& __x, const __type_identity_t<allocator_type>& __a)
      |       ^~~~~~
/usr/include/c++/14/bits/stl_vector.h:624:28: note:   no known conversion for argument 1 from 'll' {aka 'long long int'} to 'const std::vector<std::pair<long long int, long long int> >&'
  624 |       vector(const vector& __x, const __type_identity_t<allocator_type>& __a)
      |              ~~~~~~~~~~~~~~^~~
/usr/include/c++/14/bits/stl_vector.h:620:7: note: candidate: 'std::vector<_Tp, _Alloc>::vector(std::vector<_Tp, _Alloc>&&) [with _Tp = std::pair<long long int, long long int>; _Alloc = std::allocator<std::pair<long long int, long long int> >]'
  620 |       vector(vector&&) noexcept = default;
      |       ^~~~~~
/usr/include/c++/14/bits/stl_vector.h:620:7: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_vector.h:601:7: note: candidate: 'std::vector<_Tp, _Alloc>::vector(const std::vector<_Tp, _Alloc>&) [with _Tp = std::pair<long long int, long long int>; _Alloc = std::allocator<std::pair<long long int, long long int> >]'
  601 |       vector(const vector& __x)
      |       ^~~~~~
/usr/include/c++/14/bits/stl_vector.h:601:7: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_vector.h:569:7: note: candidate: 'std::vector<_Tp, _Alloc>::vector(size_type, const value_type&, const allocator_type&) [with _Tp = std::pair<long long int, long long int>; _Alloc = std::allocator<std::pair<long long int, long long int> >; size_type = long unsigned int; value_type = std::pair<long long int, long long int>; allocator_type = std::allocator<std::pair<long long int, long long int> >]'
  569 |       vector(size_type __n, const value_type& __value,
      |       ^~~~~~
/usr/include/c++/14/bits/stl_vector.h:569:47: note:   no known conversion for argument 2 from '<brace-enclosed initializer list>' to 'const std::vector<std::pair<long long int, long long int> >::value_type&' {aka 'const std::pair<long long int, long long int>&'}
  569 |       vector(size_type __n, const value_type& __value,
      |                             ~~~~~~~~~~~~~~~~~~^~~~~~~
/usr/include/c++/14/bits/stl_vector.h:556:7: note: candidate: 'std::vector<_Tp, _Alloc>::vector(size_type, const allocator_type&) [with _Tp = std::pair<long long int, long long int>; _Alloc = std::allocator<std::pair<long long int, long long int> >; size_type = long unsigned int; allocator_type = std::allocator<std::pair<long long int, long long int> >]'
  556 |       vector(size_type __n, const allocator_type& __a = allocator_type())
      |       ^~~~~~
/usr/include/c++/14/bits/stl_vector.h:556:51: note:   no known conversion for argument 2 from '<brace-enclosed initializer list>' to 'const std::vector<std::pair<long long int, long long int> >::allocator_type&' {aka 'const std::allocator<std::pair<long long int, long long int> >&'}
  556 |       vector(size_type __n, const allocator_type& __a = allocator_type())
      |                             ~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_vector.h:542:7: note: candidate: 'std::vector<_Tp, _Alloc>::vector(const allocator_type&) [with _Tp = std::pair<long long int, long long int>; _Alloc = std::allocator<std::pair<long long int, long long int> >; allocator_type = std::allocator<std::pair<long long int, long long int> >]'
  542 |       vector(const allocator_type& __a) _GLIBCXX_NOEXCEPT
      |       ^~~~~~
/usr/include/c++/14/bits/stl_vector.h:542:7: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_vector.h:531:7: note: candidate: 'std::vector<_Tp, _Alloc>::vector() [with _Tp = std::pair<long long int, long long int>; _Alloc = std::allocator<std::pair<long long int, long long int> >]'
  531 |       vector() = default;
      |       ^~~~~~
/usr/include/c++/14/bits/stl_vector.h:531:7: note:   candidate expects 0 arguments, 2 provided