oj.uz

Submission #490315

# Submission time Handle Problem Language Result Execution time Memory
490315 2021-11-27T00:56:08 Z SirCovidThe19th 007 (CEOI14_007) C++17
100 / 100
 394 ms 16196 KB 
#include <bits/stdc++.h>
using namespace std;

const int mx = 2e5 + 5;

int n, m, s, v, a, b, dA[mx], dB[mx], ans; vector<int> adj[mx];

void bfs(int st, int *D){
    queue<int> Q; fill(D, D + n + 1, -1); 
    Q.push(st); D[st] = 0;
    while (!Q.empty()){
        int i = Q.front(); Q.pop();
        for (int j : adj[i]) if (D[j] == -1) D[j] = D[i] + 1, Q.push(j);
    }
}
int same(int pos){
    int d = 0;
    while (1){
        bool ok = 0;
        for (int i : adj[pos]) if (dA[i] < dA[pos] and dB[i] < dB[pos]){
            pos = i; ok = 1; d++; 
            break;
        }
        if (!ok) break;
    }
    return d;
}

int main(){
    cin >> n >> m >> s >> v >> a >> b;
    for (int i = 1; i <= m; i++){
        int a, b; cin >> a >> b;
        adj[a].push_back(b); adj[b].push_back(a);
    }
    bfs(a, dA); bfs(b, dB);
    int wA = dA[v] - dA[s], wB = dB[v] - dB[s];

    if (wA == wB) ans = (same(s) + wA < same(v) ? wA - 1 : wA);
    else ans = min(wA, wB);

    cout<<max(ans, -1)<<endl;
}

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 3 ms 4940 KB Output is correct
5 Correct 2 ms 4940 KB Output is correct
6 Correct 2 ms 4940 KB Output is correct
7 Correct 2 ms 4940 KB Output is correct
8 Correct 2 ms 4940 KB Output is correct
9 Correct 2 ms 4940 KB Output is correct
10 Correct 3 ms 4940 KB Output is correct
11 Correct 3 ms 4940 KB Output is correct
12 Correct 2 ms 4940 KB Output is correct
13 Correct 2 ms 4940 KB Output is correct
14 Correct 2 ms 4940 KB Output is correct
15 Correct 2 ms 4940 KB Output is correct
16 Correct 3 ms 4940 KB Output is correct
17 Correct 3 ms 4940 KB Output is correct
18 Correct 3 ms 4940 KB Output is correct
19 Correct 3 ms 4940 KB Output is correct
20 Correct 3 ms 4940 KB Output is correct
21 Correct 3 ms 4904 KB Output is correct
22 Correct 3 ms 4940 KB Output is correct
23 Correct 3 ms 4940 KB Output is correct
24 Correct 3 ms 4940 KB Output is correct

Subtask #2
70.0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 31 ms 6592 KB Output is correct
2 Correct 41 ms 7204 KB Output is correct
3 Correct 32 ms 6648 KB Output is correct
4 Correct 43 ms 7364 KB Output is correct
5 Correct 31 ms 6472 KB Output is correct
6 Correct 34 ms 6636 KB Output is correct
7 Correct 36 ms 6900 KB Output is correct
8 Correct 37 ms 6856 KB Output is correct
9 Correct 58 ms 7236 KB Output is correct
10 Correct 254 ms 11524 KB Output is correct
11 Correct 69 ms 8436 KB Output is correct
12 Correct 93 ms 9312 KB Output is correct
13 Correct 78 ms 8780 KB Output is correct
14 Correct 60 ms 8084 KB Output is correct
15 Correct 86 ms 9428 KB Output is correct
16 Correct 98 ms 9740 KB Output is correct
17 Correct 83 ms 9216 KB Output is correct
18 Correct 99 ms 9216 KB Output is correct
19 Correct 153 ms 10424 KB Output is correct
20 Correct 287 ms 13180 KB Output is correct
21 Correct 128 ms 11276 KB Output is correct
22 Correct 119 ms 10504 KB Output is correct
23 Correct 126 ms 11060 KB Output is correct
24 Correct 121 ms 11084 KB Output is correct
25 Correct 125 ms 10788 KB Output is correct
26 Correct 122 ms 10412 KB Output is correct
27 Correct 143 ms 11140 KB Output is correct
28 Correct 132 ms 11216 KB Output is correct
29 Correct 188 ms 11844 KB Output is correct
30 Correct 317 ms 13788 KB Output is correct
31 Correct 147 ms 12156 KB Output is correct
32 Correct 133 ms 11140 KB Output is correct
33 Correct 129 ms 11332 KB Output is correct
34 Correct 145 ms 11640 KB Output is correct
35 Correct 137 ms 11512 KB Output is correct
36 Correct 138 ms 11624 KB Output is correct
37 Correct 160 ms 12532 KB Output is correct
38 Correct 172 ms 12420 KB Output is correct
39 Correct 172 ms 12484 KB Output is correct
40 Correct 275 ms 13908 KB Output is correct
41 Correct 394 ms 16196 KB Output is correct