Submission #1128798

#	Time	Username	Problem	Language	Result	Execution time	Memory
1128798		Muhammet	Toll (BOI17_toll)	C++20	56 / 100	2635 ms	4772 KiB

toll

#include <bits/stdc++.h>

using namespace std;

#define SZ(s) (int)s.size()
#define ff first
#define ss second

int k, n, m, o;

int main(){
	ios::sync_with_stdio(false); cin.tie(nullptr);

	cin >> k >> n >> m >> o;
	vector <vector <pair<int,int>>> v(n);
	for(int i = 1; i <= m; i++){
		int u1, u2, s;
		cin >> u1 >> u2 >> s;
		v[u1].push_back({u2,s});
	}
	bool tr = 0;
	vector <int> dis1(n, 1e9);
	if(o > 3000 and k != 1){
		dis1[0] = 0;
		for(int i = 0; i < n; i++){
			for(auto j : v[i]){
				dis1[j.ff] = min(dis1[j.ff], dis1[i] + j.ss);
			}
		}
		tr = 1;
	}
	while(o--){
		int a, b;
		cin >> a >> b;
		if(tr){
			cout << (dis1[b] == 1e9 ? -1 : dis1[b]) << '\n';
			continue;
		}
		vector <int> dis(n, 1e9);
		dis[a] = 0;
		for(int i = a; i < n; i++){
			for(auto j : v[i]){
				dis[j.ff] = min(dis[j.ff], dis[i] + j.ss);
			}
		}
		cout << (dis[b] == 1e9 ? -1 : dis[b]) << '\n';
	}
}

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