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답안 #490321

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
490321 2021-11-27T01:40:12 Z SirCovidThe19th 007 (CEOI14_007) C++17
100 / 100
 195 ms 16808 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 nearer(int src){
	queue<int> Q; int D[n + 1], ret = 0; 
	fill(D, D + n + 1, -1); D[src] = 0; Q.push(src);
	while (!Q.empty()){
		int i = Q.front(); Q.pop();
		for (int j : adj[i]) if (D[j] == -1 and dA[j] < dA[i] and dB[j] < dB[i]){
            D[j] = D[i] + 1; ret = max(ret, D[i]);
            Q.push(j);
        }
	}
	return ret;
}
 
int main(){
	ios_base::sync_with_stdio(0); cin.tie(0); 
    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 = (nearer(s) >= nearer(v) - wA) ? wA : wA - 1;
    else ans = min(wA, wB);
 
    cout<<max(ans, -1)<<endl;
}

Subtask #1
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 2 ms 4940 KB Output is correct
3 Correct 2 ms 5024 KB Output is correct
4 Correct 2 ms 4940 KB Output is correct
5 Correct 3 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 5024 KB Output is correct
10 Correct 3 ms 5016 KB Output is correct
11 Correct 3 ms 4940 KB Output is correct
12 Correct 3 ms 4940 KB Output is correct
13 Correct 3 ms 4940 KB Output is correct
14 Correct 3 ms 4940 KB Output is correct
15 Correct 3 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 2 ms 4940 KB Output is correct
19 Correct 3 ms 4940 KB Output is correct
20 Correct 3 ms 5024 KB Output is correct
21 Correct 3 ms 5020 KB Output is correct
22 Correct 2 ms 5024 KB Output is correct
23 Correct 3 ms 4940 KB Output is correct
24 Correct 3 ms 5068 KB Output is correct

Subtask #2
70.0 / 70.0

# 결과 실행 시간 메모리 Grader output
1 Correct 16 ms 6732 KB Output is correct
2 Correct 24 ms 7536 KB Output is correct
3 Correct 21 ms 6940 KB Output is correct
4 Correct 22 ms 7648 KB Output is correct
5 Correct 16 ms 6584 KB Output is correct
6 Correct 17 ms 6780 KB Output is correct
7 Correct 19 ms 7140 KB Output is correct
8 Correct 19 ms 7148 KB Output is correct
9 Correct 30 ms 7492 KB Output is correct
10 Correct 107 ms 11960 KB Output is correct
11 Correct 34 ms 8900 KB Output is correct
12 Correct 48 ms 9788 KB Output is correct
13 Correct 40 ms 9196 KB Output is correct
14 Correct 32 ms 8416 KB Output is correct
15 Correct 47 ms 9884 KB Output is correct
16 Correct 49 ms 9688 KB Output is correct
17 Correct 47 ms 9656 KB Output is correct
18 Correct 45 ms 9684 KB Output is correct
19 Correct 71 ms 10820 KB Output is correct
20 Correct 143 ms 13684 KB Output is correct
21 Correct 76 ms 11904 KB Output is correct
22 Correct 70 ms 10960 KB Output is correct
23 Correct 67 ms 11748 KB Output is correct
24 Correct 72 ms 11724 KB Output is correct
25 Correct 69 ms 11380 KB Output is correct
26 Correct 59 ms 11060 KB Output is correct
27 Correct 75 ms 11804 KB Output is correct
28 Correct 82 ms 11792 KB Output is correct
29 Correct 98 ms 12388 KB Output is correct
30 Correct 146 ms 14424 KB Output is correct
31 Correct 97 ms 12900 KB Output is correct
32 Correct 75 ms 11712 KB Output is correct
33 Correct 72 ms 12000 KB Output is correct
34 Correct 85 ms 12380 KB Output is correct
35 Correct 68 ms 12032 KB Output is correct
36 Correct 72 ms 12340 KB Output is correct
37 Correct 98 ms 12748 KB Output is correct
38 Correct 89 ms 13124 KB Output is correct
39 Correct 98 ms 13160 KB Output is correct
40 Correct 136 ms 14716 KB Output is correct
41 Correct 195 ms 16808 KB Output is correct