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Submission #714736

# Submission time Handle Problem Language Result Execution time Memory
714736 2023-03-25T08:41:10 Z Iliya Toll (BOI17_toll) C++17
25 / 100
 3000 ms 7692 KB 
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
const int N = 5e4 + 10;
const int Inf = 0x3f3f3f3f;
vector<pair<int, int>> Adj[N], Order, Order2[N];
int n, m, k, o, C[N], D[N], mark[N], ans[N];
void Dijkstra(int v) 
{
	memset(D, 63, sizeof D);
	memset(mark, 0, sizeof mark);
	D[v] = 0;
	priority_queue<pair<int, int>> PQ;
	PQ.emplace(0, v);
	while (!PQ.empty()) 
	{
		int v = PQ.top().second; PQ.pop();
		if (mark[v]) continue;
		mark[v] = true;
		for (auto [u, w] : Adj[v]) 
			if (D[u] > D[v] + w)
				D[u] = D[v] + w, PQ.emplace(-D[u], u);
	}
}
void DFS(int v, int comp) 
{
	mark[v] = true;
	C[v] = comp;
	for (auto [u, w] : Adj[v])
		D[u] = D[v] + w, DFS(u, comp);
}
void Subtask1() 
{
	for (int i = 0; i < n; i++) 
		if (!mark[i]) DFS(i, i);
	for (auto [u, v] : Order) 
	{
		if (u < v) swap(u, v);
		if (C[u] == C[v]) 
			printf("%d\n", D[u] - D[v]);
		else 
			printf("%d\n", -1);
	}
}
signed main() 
{	
	scanf("%d%d%d%d", &k, &n, &m, &o);
	for (int i = 0; i < m; i++) 
	{
		int a, b, t;
		scanf("%d%d%d", &a, &b, &t);
		Adj[a].emplace_back(b, t);
	}
	vector<int> V;
	for (int i = 0; i < o; i++)
	{
		int a, b;
		scanf("%d%d", &a, &b);
		Order.emplace_back(a, b);
		Order2[a].emplace_back(b, i);
		V.push_back(a);
	}
	sort(V.begin(), V.end());
	V.resize(unique(V.begin(), V.end()) - V.begin());
	if (k == 1) {Subtask1(); return 0;}
	for (int x : V) 
	{
		Dijkstra(x);
		for (auto [u, i] : Order2[x])
			ans[i] = D[u];
	}
	for (int i = 0; i < o; i++) 
		printf("%d\n", (ans[i] == Inf ? -1 : ans[i]));
	return 0;
}

Compilation message

toll.cpp: In function 'int main()':
toll.cpp:47:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   47 |  scanf("%d%d%d%d", &k, &n, &m, &o);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
toll.cpp:51:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   51 |   scanf("%d%d%d", &a, &b, &t);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~
toll.cpp:58:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   58 |   scanf("%d%d", &a, &b);
      |   ~~~~~^~~~~~~~~~~~~~~~

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 24 ms 7692 KB Output is correct
2 Correct 1 ms 2644 KB Output is correct
3 Correct 2 ms 2644 KB Output is correct
4 Correct 1 ms 2644 KB Output is correct
5 Correct 2 ms 2644 KB Output is correct
6 Correct 2 ms 2644 KB Output is correct
7 Correct 3 ms 2644 KB Output is correct
8 Correct 32 ms 5324 KB Output is correct
9 Correct 22 ms 5196 KB Output is correct
10 Correct 6 ms 3412 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 36 ms 5016 KB Output is correct
2 Correct 2 ms 2644 KB Output is correct
3 Correct 2 ms 3028 KB Output is correct
4 Correct 3 ms 3028 KB Output is correct
5 Correct 1 ms 3028 KB Output is correct
6 Correct 2 ms 3028 KB Output is correct
7 Correct 4 ms 3092 KB Output is correct
8 Correct 5 ms 3476 KB Output is correct
9 Correct 22 ms 5356 KB Output is correct
10 Correct 52 ms 5944 KB Output is correct
11 Correct 37 ms 5148 KB Output is correct
12 Correct 27 ms 4908 KB Output is correct
13 Correct 55 ms 5848 KB Output is correct
14 Correct 39 ms 4772 KB Output is correct
15 Correct 33 ms 4388 KB Output is correct
16 Correct 31 ms 4472 KB Output is correct

Subtask #3
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2644 KB Output is correct
2 Correct 2 ms 3028 KB Output is correct
3 Correct 2 ms 3028 KB Output is correct
4 Correct 2 ms 3052 KB Output is correct
5 Correct 2 ms 3028 KB Output is correct
6 Correct 2 ms 2644 KB Output is correct
7 Correct 5 ms 3028 KB Output is correct
8 Correct 12 ms 3208 KB Output is correct
9 Correct 8 ms 3028 KB Output is correct
10 Correct 21 ms 4948 KB Output is correct
11 Correct 263 ms 4596 KB Output is correct
12 Correct 336 ms 5452 KB Output is correct
13 Correct 355 ms 5736 KB Output is correct
14 Correct 299 ms 5116 KB Output is correct
15 Correct 200 ms 4352 KB Output is correct
16 Correct 196 ms 4348 KB Output is correct

Subtask #4
0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2644 KB Output is correct
2 Correct 2 ms 3028 KB Output is correct
3 Correct 2 ms 3028 KB Output is correct
4 Correct 2 ms 3052 KB Output is correct
5 Correct 2 ms 3028 KB Output is correct
6 Correct 2 ms 2644 KB Output is correct
7 Correct 5 ms 3028 KB Output is correct
8 Correct 12 ms 3208 KB Output is correct
9 Correct 8 ms 3028 KB Output is correct
10 Correct 21 ms 4948 KB Output is correct
11 Correct 263 ms 4596 KB Output is correct
12 Correct 336 ms 5452 KB Output is correct
13 Correct 355 ms 5736 KB Output is correct
14 Correct 299 ms 5116 KB Output is correct
15 Correct 200 ms 4352 KB Output is correct
16 Correct 196 ms 4348 KB Output is correct
17 Execution timed out 3069 ms 4732 KB Time limit exceeded
18 Halted 0 ms 0 KB -

Subtask #5
0 / 44.0

# Verdict Execution time Memory Grader output
1 Correct 24 ms 7692 KB Output is correct
2 Correct 1 ms 2644 KB Output is correct
3 Correct 2 ms 2644 KB Output is correct
4 Correct 1 ms 2644 KB Output is correct
5 Correct 2 ms 2644 KB Output is correct
6 Correct 2 ms 2644 KB Output is correct
7 Correct 3 ms 2644 KB Output is correct
8 Correct 32 ms 5324 KB Output is correct
9 Correct 22 ms 5196 KB Output is correct
10 Correct 6 ms 3412 KB Output is correct
11 Correct 36 ms 5016 KB Output is correct
12 Correct 2 ms 2644 KB Output is correct
13 Correct 2 ms 3028 KB Output is correct
14 Correct 3 ms 3028 KB Output is correct
15 Correct 1 ms 3028 KB Output is correct
16 Correct 2 ms 3028 KB Output is correct
17 Correct 4 ms 3092 KB Output is correct
18 Correct 5 ms 3476 KB Output is correct
19 Correct 22 ms 5356 KB Output is correct
20 Correct 52 ms 5944 KB Output is correct
21 Correct 37 ms 5148 KB Output is correct
22 Correct 27 ms 4908 KB Output is correct
23 Correct 55 ms 5848 KB Output is correct
24 Correct 39 ms 4772 KB Output is correct
25 Correct 33 ms 4388 KB Output is correct
26 Correct 31 ms 4472 KB Output is correct
27 Correct 1 ms 2644 KB Output is correct
28 Correct 2 ms 3028 KB Output is correct
29 Correct 2 ms 3028 KB Output is correct
30 Correct 2 ms 3052 KB Output is correct
31 Correct 2 ms 3028 KB Output is correct
32 Correct 2 ms 2644 KB Output is correct
33 Correct 5 ms 3028 KB Output is correct
34 Correct 12 ms 3208 KB Output is correct
35 Correct 8 ms 3028 KB Output is correct
36 Correct 21 ms 4948 KB Output is correct
37 Correct 263 ms 4596 KB Output is correct
38 Correct 336 ms 5452 KB Output is correct
39 Correct 355 ms 5736 KB Output is correct
40 Correct 299 ms 5116 KB Output is correct
41 Correct 200 ms 4352 KB Output is correct
42 Correct 196 ms 4348 KB Output is correct
43 Execution timed out 3069 ms 4732 KB Time limit exceeded
44 Halted 0 ms 0 KB -