Submission #872857

#	Time	Username	Problem	Language	Result	Execution time	Memory
872857		MinaRagy06	Two Currencies (JOI23_currencies)	C++17	Compilation error	0 ms	0 KiB

currencies

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

const int N = 100'005;
vector<array<int, 2>> adj[N];
vector<ll> v[N];
vector<ll> cur;
bool dfs(int i, int par, int dest) {
	if (i == dest) return 1;
	for (auto [nxt, idx] : adj[i]) {
		if (nxt == par) continue;
		for (auto x : v[idx]) {
			cur.push_back(x);
		}
		if (dfs(nxt, i, dest)) {
			return 1;
		}
		for (auto x : v[idx]) {
			cur.pop_back();
		}
	}
	return 0;
}
int main() {
	ios_base::sync_with_stdio(0), cin.tie(0);
	int n, m, q;
	cin >> n >> m >> q;
	for (int i = 0, U, V; i < n - 1; i++) {
		cin >> U >> V;
		adj[U].push_back({V, i + 1});
		adj[V].push_back({U, i + 1});
	}
	for (int i = 0; i < m; i++) {
		ll p, c;
		cin >> p >> c;
		v[p].push_back(c);
	}
	while (q--) {
		cur.clear();
		int s, t;
		ll x, y;
		cin >> s >> t >> x >> y;
		dfs(s, 0, t);
		sort(cur.begin(), cur.end());
		x -= cur.size();
		for (int i = 0; i < cur.size(); i++) {
			if (y - cur[i] >= 0) {
				y -= cur[i];
				x++;
			} else {
				break;
			}
		}
		cout << max((ll)x, -1) << '\n';
	}
	return 0;
}

Compilation message (stderr)

currencies.cpp: In function 'bool dfs(int, int, int)':
currencies.cpp:19:13: warning: unused variable 'x' [-Wunused-variable]
   19 |   for (auto x : v[idx]) {
      |             ^
currencies.cpp: In function 'int main()':
currencies.cpp:47:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   47 |   for (int i = 0; i < cur.size(); i++) {
      |                   ~~^~~~~~~~~~~~
currencies.cpp:55:24: error: no matching function for call to 'max(long long int, int)'
   55 |   cout << max((ll)x, -1) << '\n';
      |                        ^
In file included from /usr/include/c++/10/bits/specfun.h:45,
                 from /usr/include/c++/10/cmath:1927,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:41,
                 from currencies.cpp:1:
/usr/include/c++/10/bits/stl_algobase.h:254:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
  254 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/10/bits/stl_algobase.h:254:5: note:   template argument deduction/substitution failed:
currencies.cpp:55:24: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
   55 |   cout << max((ll)x, -1) << '\n';
      |                        ^
In file included from /usr/include/c++/10/bits/specfun.h:45,
                 from /usr/include/c++/10/cmath:1927,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:41,
                 from currencies.cpp:1:
/usr/include/c++/10/bits/stl_algobase.h:300:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  300 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/10/bits/stl_algobase.h:300:5: note:   template argument deduction/substitution failed:
currencies.cpp:55:24: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
   55 |   cout << max((ll)x, -1) << '\n';
      |                        ^
In file included from /usr/include/c++/10/algorithm:62,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:65,
                 from currencies.cpp:1:
/usr/include/c++/10/bits/stl_algo.h:3480:5: note: candidate: 'template<class _Tp> constexpr _Tp std::max(std::initializer_list<_Tp>)'
 3480 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/10/bits/stl_algo.h:3480:5: note:   template argument deduction/substitution failed:
currencies.cpp:55:24: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   55 |   cout << max((ll)x, -1) << '\n';
      |                        ^
In file included from /usr/include/c++/10/algorithm:62,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:65,
                 from currencies.cpp:1:
/usr/include/c++/10/bits/stl_algo.h:3486:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::max(std::initializer_list<_Tp>, _Compare)'
 3486 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/10/bits/stl_algo.h:3486:5: note:   template argument deduction/substitution failed:
currencies.cpp:55:24: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   55 |   cout << max((ll)x, -1) << '\n';
      |                        ^