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Submission #864550

# Submission time Handle Problem Language Result Execution time Memory
864550 2023-10-23T07:47:36 Z iskhakkutbilim Toll (BOI17_toll) C++17
46 / 100
 1780 ms 7140 KB 
#include <bits/stdc++.h>
using namespace std;
 
#define int long long
#define ff first
#define ss second
#define all(a) a.begin(), a.end()
const int N = 5e4;
const int mod = 1e17;
vector< pair<int, int> > g[N];
int k, n, m, q;
main(){
   ios::sync_with_stdio(0);
   cin.tie(0); cout.tie(0);
	cin >> k >> n >> m >> q;
	vector<int> dis(n, mod), parent(n, -1);
	for(int i = 0;i < m; i++){
		int a, b, w; cin >> a >> b >> w;
		
		g[a].push_back({b, w});
	}
	
	vector<pair<int, int> > Q;
	int z = 0;
	for(int i = 0;i < q; i++){
		int a, b; cin >> a >> b;
		z+= (a == 0);
		Q.push_back({a, b});
	}
	dis[0] = 0;
	for(int i = 0; i < n; i++){
			for(auto [to, w] : g[i]){
				if(dis[to] > dis[i] + w){
					dis[to] = dis[i] + w;
					parent[to] = i;
				}
			}
		}
	if(z == q){
		for(auto [a, b] : Q){
			if(a == b){
				cout << 0 << '\n';
				continue;
			}
			if(dis[b] >= mod or dis[a] >= mod) cout << "-1" << '\n';
			else cout << dis[b] - dis[parent[a]]<< '\n';
		}
		
		
		return 0;
	}
	
	for(auto [a, b] : Q){
		if(a == b){
			cout << 0 << '\n';
			continue;
		}
		for(int i = 0;i < n; i++) dis[i] = mod;
		dis[a] = 0;
		for(int i = a; i < n; i++){
			for(auto [to, w] : g[i]){
				if(dis[to] > dis[i] + w){
					dis[to] = dis[i] + w;
				}
			}
		}
		if(dis[b] >= mod) cout << "-1\n";
		else cout << dis[b] << '\n';
	}
	return 0;
}

Compilation message

toll.cpp:12:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   12 | main(){
      | ^~~~

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1380 ms 4356 KB Output is correct
2 Correct 1 ms 1368 KB Output is correct
3 Correct 1 ms 1372 KB Output is correct
4 Correct 1 ms 1628 KB Output is correct
5 Correct 3 ms 1628 KB Output is correct
6 Correct 3 ms 1628 KB Output is correct
7 Correct 3 ms 1628 KB Output is correct
8 Correct 1314 ms 4188 KB Output is correct
9 Correct 1263 ms 4224 KB Output is correct
10 Correct 518 ms 2720 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 25 ms 5212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1628 KB Output is correct
2 Correct 1 ms 1628 KB Output is correct
3 Correct 1 ms 1628 KB Output is correct
4 Correct 1 ms 1372 KB Output is correct
5 Correct 1 ms 1628 KB Output is correct
6 Correct 1 ms 1628 KB Output is correct
7 Correct 1 ms 1628 KB Output is correct
8 Correct 2 ms 1628 KB Output is correct
9 Correct 2 ms 1628 KB Output is correct
10 Correct 24 ms 3932 KB Output is correct
11 Correct 61 ms 5208 KB Output is correct
12 Correct 96 ms 6580 KB Output is correct
13 Correct 103 ms 6744 KB Output is correct
14 Correct 91 ms 5464 KB Output is correct
15 Correct 60 ms 3928 KB Output is correct
16 Correct 60 ms 3932 KB Output is correct

Subtask #4
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1628 KB Output is correct
2 Correct 1 ms 1628 KB Output is correct
3 Correct 1 ms 1628 KB Output is correct
4 Correct 1 ms 1372 KB Output is correct
5 Correct 1 ms 1628 KB Output is correct
6 Correct 1 ms 1628 KB Output is correct
7 Correct 1 ms 1628 KB Output is correct
8 Correct 2 ms 1628 KB Output is correct
9 Correct 2 ms 1628 KB Output is correct
10 Correct 24 ms 3932 KB Output is correct
11 Correct 61 ms 5208 KB Output is correct
12 Correct 96 ms 6580 KB Output is correct
13 Correct 103 ms 6744 KB Output is correct
14 Correct 91 ms 5464 KB Output is correct
15 Correct 60 ms 3928 KB Output is correct
16 Correct 60 ms 3932 KB Output is correct
17 Correct 1126 ms 5072 KB Output is correct
18 Correct 1 ms 1368 KB Output is correct
19 Correct 1 ms 1372 KB Output is correct
20 Correct 1 ms 1444 KB Output is correct
21 Correct 1 ms 1628 KB Output is correct
22 Correct 1 ms 1624 KB Output is correct
23 Correct 7 ms 1784 KB Output is correct
24 Correct 11 ms 1820 KB Output is correct
25 Correct 19 ms 1884 KB Output is correct
26 Correct 16 ms 1624 KB Output is correct
27 Correct 342 ms 3932 KB Output is correct
28 Correct 1780 ms 6476 KB Output is correct
29 Correct 1653 ms 7140 KB Output is correct
30 Correct 1236 ms 5692 KB Output is correct

Subtask #5
0 / 44.0

# Verdict Execution time Memory Grader output
1 Correct 1380 ms 4356 KB Output is correct
2 Correct 1 ms 1368 KB Output is correct
3 Correct 1 ms 1372 KB Output is correct
4 Correct 1 ms 1628 KB Output is correct
5 Correct 3 ms 1628 KB Output is correct
6 Correct 3 ms 1628 KB Output is correct
7 Correct 3 ms 1628 KB Output is correct
8 Correct 1314 ms 4188 KB Output is correct
9 Correct 1263 ms 4224 KB Output is correct
10 Correct 518 ms 2720 KB Output is correct
11 Incorrect 25 ms 5212 KB Output isn't correct
12 Halted 0 ms 0 KB -