Submission #463689

#	Time	Username	Problem	Language	Result	Execution time	Memory
463689		_Avocado_	Toll (BOI17_toll)	C++14	0 / 100	222 ms	524292 KiB

toll

#include <bits/stdc++.h>
#define int int64_t
using namespace std;

vector<vector<pair<int, int>>>graph;
vector<vector<int>>dist;

void dijkstra(int s){
	priority_queue<pair<int, int>>pq;
	pq.push({0, s});
	
	while(!pq.empty()){
		int d = -pq.top().first;
		int u = pq.top().second;
		pq.pop();
		
		if(dist[s][u] != -1) continue;
		
		dist[s][u] = d;
		
		for(auto [v, w]: graph[u]){
			pq.push({-(w+dist[s][u]), v});
		}
	}
}

signed main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	
	int k, n, m, q; cin>>k>>n>>m>>q;
	
	graph.assign(n, vector<pair<int, int>>());
	dist.assign(n, vector<int>(n, -1));
	
	for(int i = 0; i<m; ++i){
		int a, b, c; cin>>a>>b>>c;
		graph[a].push_back({b, c});
	}
	
	for(int i = 0; i<n; ++i){
		dijkstra(i);
	}
	
	for(int i = 0; i<q; ++i){
		int a, b; cin>>a>>b;
		
		cout<<dist[a][b]<<'\n';
	}
	
	//cout<<'\n';
}

Compilation message (stderr)

toll.cpp: In function 'void dijkstra(int64_t)':
toll.cpp:21:12: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   21 |   for(auto [v, w]: graph[u]){
      |            ^

• Subtask 1: 0 / 7
• Subtask 2: 0 / 10
• Subtask 3: 0 / 8
• Subtask 4: 0 / 31
• Subtask 5: 0 / 44