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Submission #556521

# Submission time Handle Problem Language Result Execution time Memory
556521 2022-05-03T09:38:39 Z alextodoran 007 (CEOI14_007) C++17
30 / 100
 1000 ms 16116 KB 
/**
 ____ ____ ____ ____ ____
||a |||t |||o |||d |||o ||
||__|||__|||__|||__|||__||
|/__\|/__\|/__\|/__\|/__\|

**/

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

const int N_MAX = 200000;

int N, M;

int me, him, sv1, sv2;

vector <int> adj[N_MAX + 2];

void bfs (int start, int dist[]) {
    fill(dist + 1, dist + N + 1, INT_MAX);
    queue <int> q;
    dist[start] = 0;
    q.push(start);
    while (q.empty() == false) {
        int u = q.front(); q.pop();
        for (int v : adj[u]) {
            if (dist[v] == INT_MAX) {
                dist[v] = dist[u] + 1;
                q.push(v);
            }
        }
    }
}

int dist1[N_MAX + 2];
int dist2[N_MAX + 2];

int dfs (int u) {
    int ret = 0;
    for (int v : adj[u]) {
        if (dist1[u] > dist1[v] && dist2[u] > dist2[v]) {
            ret = max(ret, dfs(v) + 1);
        }
    }
    return ret;
}

int main () {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);

    cin >> N >> M;
    cin >> me >> him >> sv1 >> sv2;
    for (int i = 1; i <= M; i++) {
        int u, v;
        cin >> u >> v;
        adj[u].push_back(v);
        adj[v].push_back(u);
    }

    bfs(sv1, dist1);
    bfs(sv2, dist2);

    int wait1 = dist1[him] - dist1[me];
    int wait2 = dist2[him] - dist2[me];
    int wait;
    if (wait1 != wait2) {
        wait = min(wait1, wait2);
    } else {
        int decme = dfs(me);
        int dechim = dfs(him);
        if (wait1 + decme >= dechim) {
            wait = wait1;
        } else {
            wait = wait1 - 1;
        }
    }
    cout << (wait >= 0 ? wait : -1) << "\n";

    return 0;
}

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 2 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 3 ms 4944 KB Output is correct
7 Correct 3 ms 4924 KB Output is correct
8 Correct 3 ms 5024 KB Output is correct
9 Correct 4 ms 4948 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 2 ms 4948 KB Output is correct
13 Correct 3 ms 4948 KB Output is correct
14 Correct 3 ms 4948 KB Output is correct
15 Correct 3 ms 4948 KB Output is correct
16 Correct 3 ms 4948 KB Output is correct
17 Correct 3 ms 4948 KB Output is correct
18 Correct 3 ms 4948 KB Output is correct
19 Correct 3 ms 4948 KB Output is correct
20 Correct 3 ms 4948 KB Output is correct
21 Correct 3 ms 4948 KB Output is correct
22 Correct 3 ms 4948 KB Output is correct
23 Correct 2 ms 4948 KB Output is correct
24 Correct 6 ms 4948 KB Output is correct

Subtask #2
0.0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 25 ms 6512 KB Output is correct
2 Correct 35 ms 7484 KB Output is correct
3 Correct 18 ms 6700 KB Output is correct
4 Correct 22 ms 7636 KB Output is correct
5 Correct 17 ms 6488 KB Output is correct
6 Correct 19 ms 6748 KB Output is correct
7 Correct 24 ms 6952 KB Output is correct
8 Correct 20 ms 6916 KB Output is correct
9 Execution timed out 1092 ms 7372 KB Time limit exceeded
10 Execution timed out 1073 ms 11700 KB Time limit exceeded
11 Correct 44 ms 8596 KB Output is correct
12 Correct 54 ms 9396 KB Output is correct
13 Correct 41 ms 8716 KB Output is correct
14 Correct 31 ms 8308 KB Output is correct
15 Correct 71 ms 9644 KB Output is correct
16 Correct 56 ms 9788 KB Output is correct
17 Correct 53 ms 9244 KB Output is correct
18 Correct 44 ms 9236 KB Output is correct
19 Execution timed out 1091 ms 10500 KB Time limit exceeded
20 Execution timed out 1096 ms 13240 KB Time limit exceeded
21 Correct 95 ms 11980 KB Output is correct
22 Correct 83 ms 10440 KB Output is correct
23 Correct 69 ms 12328 KB Output is correct
24 Correct 68 ms 11596 KB Output is correct
25 Correct 79 ms 10828 KB Output is correct
26 Correct 75 ms 10676 KB Output is correct
27 Correct 73 ms 11376 KB Output is correct
28 Correct 96 ms 11212 KB Output is correct
29 Execution timed out 1094 ms 11920 KB Time limit exceeded
30 Execution timed out 1085 ms 13928 KB Time limit exceeded
31 Correct 107 ms 13132 KB Output is correct
32 Correct 75 ms 11208 KB Output is correct
33 Correct 75 ms 11648 KB Output is correct
34 Correct 101 ms 11748 KB Output is correct
35 Correct 99 ms 12336 KB Output is correct
36 Correct 109 ms 12560 KB Output is correct
37 Correct 96 ms 12504 KB Output is correct
38 Correct 98 ms 12448 KB Output is correct
39 Correct 98 ms 12460 KB Output is correct
40 Execution timed out 1097 ms 14028 KB Time limit exceeded
41 Execution timed out 1077 ms 16116 KB Time limit exceeded