#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
const int N = 5e3+4;
const int inf = 1e9;
int n,m,k;
int dis[N][N],dp[N][N];
vector<int> adj[N];
bool vis[N];
double val[N];
void bfs(int rt,int dis[],int dp[]){ queue<int> d;
if (vis[rt]) return;
for (int i=0; i<n; i++) dis[i] = inf;
dis[rt] = 0, dp[rt] = 1;
for (d.push(rt); d.size(); d.pop()){ int u = d.front();
for (int v : adj[u]){
if (dis[v] == inf){
dis[v] = dis[u] + 1; d.push(v);
}
if (dis[v] == dis[u] + 1) dp[v] += dp[u];
}
}
vis[rt] = 1;
}
int main(){
ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
cin >> n >> m;
for (int a,b; m; m--){ cin >> a >> b;
adj[a].push_back(b), adj[b].push_back(a);
}
cin >> k;
for (int a,b; k; k--){ cin >> a >> b;
bfs(a, dis[a], dp[a]), bfs(b, dis[b], dp[b]);
for (int i=0; i<n; i++) if (dis[a][i] + dis[b][i] == dis[a][b])
val[i] += double(dp[a][i]*dp[b][i])/dp[a][b];
}
for (int i=1; i<n; i++) if (val[i] > val[k]) k = i;
cout << k << "\n";
return 0;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
448 KB |
Output is correct |
| 2 |
Correct |
1 ms |
468 KB |
Output is correct |
| 3 |
Correct |
1 ms |
468 KB |
Output is correct |
| 4 |
Correct |
0 ms |
468 KB |
Output is correct |
| 5 |
Correct |
0 ms |
468 KB |
Output is correct |
| 6 |
Correct |
0 ms |
468 KB |
Output is correct |
| 7 |
Correct |
1 ms |
468 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
448 KB |
Output is correct |
| 2 |
Correct |
1 ms |
468 KB |
Output is correct |
| 3 |
Correct |
1 ms |
468 KB |
Output is correct |
| 4 |
Correct |
0 ms |
468 KB |
Output is correct |
| 5 |
Correct |
0 ms |
468 KB |
Output is correct |
| 6 |
Correct |
0 ms |
468 KB |
Output is correct |
| 7 |
Correct |
1 ms |
468 KB |
Output is correct |
| 8 |
Correct |
1 ms |
468 KB |
Output is correct |
| 9 |
Correct |
1 ms |
460 KB |
Output is correct |
| 10 |
Correct |
1 ms |
468 KB |
Output is correct |
| 11 |
Correct |
1 ms |
468 KB |
Output is correct |
| 12 |
Correct |
0 ms |
468 KB |
Output is correct |
| 13 |
Correct |
1 ms |
452 KB |
Output is correct |
| 14 |
Correct |
1 ms |
468 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
448 KB |
Output is correct |
| 2 |
Correct |
1 ms |
468 KB |
Output is correct |
| 3 |
Correct |
1 ms |
468 KB |
Output is correct |
| 4 |
Correct |
0 ms |
468 KB |
Output is correct |
| 5 |
Correct |
0 ms |
468 KB |
Output is correct |
| 6 |
Correct |
0 ms |
468 KB |
Output is correct |
| 7 |
Correct |
1 ms |
468 KB |
Output is correct |
| 8 |
Correct |
1 ms |
1236 KB |
Output is correct |
| 9 |
Correct |
2 ms |
1620 KB |
Output is correct |
| 10 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 11 |
Correct |
4 ms |
2520 KB |
Output is correct |
| 12 |
Correct |
1 ms |
1236 KB |
Output is correct |
| 13 |
Correct |
1 ms |
852 KB |
Output is correct |
| 14 |
Correct |
3 ms |
2624 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
448 KB |
Output is correct |
| 2 |
Correct |
1 ms |
468 KB |
Output is correct |
| 3 |
Correct |
1 ms |
468 KB |
Output is correct |
| 4 |
Correct |
0 ms |
468 KB |
Output is correct |
| 5 |
Correct |
0 ms |
468 KB |
Output is correct |
| 6 |
Correct |
0 ms |
468 KB |
Output is correct |
| 7 |
Correct |
1 ms |
468 KB |
Output is correct |
| 8 |
Correct |
1 ms |
468 KB |
Output is correct |
| 9 |
Correct |
1 ms |
460 KB |
Output is correct |
| 10 |
Correct |
1 ms |
468 KB |
Output is correct |
| 11 |
Correct |
1 ms |
468 KB |
Output is correct |
| 12 |
Correct |
0 ms |
468 KB |
Output is correct |
| 13 |
Correct |
1 ms |
452 KB |
Output is correct |
| 14 |
Correct |
1 ms |
468 KB |
Output is correct |
| 15 |
Correct |
1 ms |
1236 KB |
Output is correct |
| 16 |
Correct |
2 ms |
1620 KB |
Output is correct |
| 17 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 18 |
Correct |
4 ms |
2520 KB |
Output is correct |
| 19 |
Correct |
1 ms |
1236 KB |
Output is correct |
| 20 |
Correct |
1 ms |
852 KB |
Output is correct |
| 21 |
Correct |
3 ms |
2624 KB |
Output is correct |
| 22 |
Correct |
2 ms |
1364 KB |
Output is correct |
| 23 |
Correct |
2 ms |
1492 KB |
Output is correct |
| 24 |
Correct |
3 ms |
2004 KB |
Output is correct |
| 25 |
Correct |
4 ms |
2644 KB |
Output is correct |
| 26 |
Correct |
4 ms |
2772 KB |
Output is correct |
| 27 |
Correct |
2 ms |
1492 KB |
Output is correct |
| 28 |
Correct |
4 ms |
3028 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
448 KB |
Output is correct |
| 2 |
Correct |
1 ms |
468 KB |
Output is correct |
| 3 |
Correct |
1 ms |
468 KB |
Output is correct |
| 4 |
Correct |
0 ms |
468 KB |
Output is correct |
| 5 |
Correct |
0 ms |
468 KB |
Output is correct |
| 6 |
Correct |
0 ms |
468 KB |
Output is correct |
| 7 |
Correct |
1 ms |
468 KB |
Output is correct |
| 8 |
Correct |
1 ms |
468 KB |
Output is correct |
| 9 |
Correct |
1 ms |
460 KB |
Output is correct |
| 10 |
Correct |
1 ms |
468 KB |
Output is correct |
| 11 |
Correct |
1 ms |
468 KB |
Output is correct |
| 12 |
Correct |
0 ms |
468 KB |
Output is correct |
| 13 |
Correct |
1 ms |
452 KB |
Output is correct |
| 14 |
Correct |
1 ms |
468 KB |
Output is correct |
| 15 |
Correct |
3 ms |
596 KB |
Output is correct |
| 16 |
Correct |
1 ms |
468 KB |
Output is correct |
| 17 |
Correct |
4 ms |
1108 KB |
Output is correct |
| 18 |
Correct |
3 ms |
960 KB |
Output is correct |
| 19 |
Correct |
5 ms |
1108 KB |
Output is correct |
| 20 |
Correct |
2 ms |
724 KB |
Output is correct |
| 21 |
Correct |
1 ms |
596 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
448 KB |
Output is correct |
| 2 |
Correct |
1 ms |
468 KB |
Output is correct |
| 3 |
Correct |
1 ms |
468 KB |
Output is correct |
| 4 |
Correct |
0 ms |
468 KB |
Output is correct |
| 5 |
Correct |
0 ms |
468 KB |
Output is correct |
| 6 |
Correct |
0 ms |
468 KB |
Output is correct |
| 7 |
Correct |
1 ms |
468 KB |
Output is correct |
| 8 |
Correct |
1 ms |
468 KB |
Output is correct |
| 9 |
Correct |
1 ms |
460 KB |
Output is correct |
| 10 |
Correct |
1 ms |
468 KB |
Output is correct |
| 11 |
Correct |
1 ms |
468 KB |
Output is correct |
| 12 |
Correct |
0 ms |
468 KB |
Output is correct |
| 13 |
Correct |
1 ms |
452 KB |
Output is correct |
| 14 |
Correct |
1 ms |
468 KB |
Output is correct |
| 15 |
Correct |
1 ms |
1236 KB |
Output is correct |
| 16 |
Correct |
2 ms |
1620 KB |
Output is correct |
| 17 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 18 |
Correct |
4 ms |
2520 KB |
Output is correct |
| 19 |
Correct |
1 ms |
1236 KB |
Output is correct |
| 20 |
Correct |
1 ms |
852 KB |
Output is correct |
| 21 |
Correct |
3 ms |
2624 KB |
Output is correct |
| 22 |
Correct |
2 ms |
1364 KB |
Output is correct |
| 23 |
Correct |
2 ms |
1492 KB |
Output is correct |
| 24 |
Correct |
3 ms |
2004 KB |
Output is correct |
| 25 |
Correct |
4 ms |
2644 KB |
Output is correct |
| 26 |
Correct |
4 ms |
2772 KB |
Output is correct |
| 27 |
Correct |
2 ms |
1492 KB |
Output is correct |
| 28 |
Correct |
4 ms |
3028 KB |
Output is correct |
| 29 |
Correct |
3 ms |
596 KB |
Output is correct |
| 30 |
Correct |
1 ms |
468 KB |
Output is correct |
| 31 |
Correct |
4 ms |
1108 KB |
Output is correct |
| 32 |
Correct |
3 ms |
960 KB |
Output is correct |
| 33 |
Correct |
5 ms |
1108 KB |
Output is correct |
| 34 |
Correct |
2 ms |
724 KB |
Output is correct |
| 35 |
Correct |
1 ms |
596 KB |
Output is correct |
| 36 |
Correct |
23 ms |
2612 KB |
Output is correct |
| 37 |
Correct |
86 ms |
14348 KB |
Output is correct |
| 38 |
Correct |
514 ms |
62156 KB |
Output is correct |
| 39 |
Correct |
113 ms |
11084 KB |
Output is correct |
| 40 |
Correct |
77 ms |
15888 KB |
Output is correct |
| 41 |
Correct |
364 ms |
51124 KB |
Output is correct |
| 42 |
Correct |
221 ms |
21496 KB |
Output is correct |
| 43 |
Correct |
34 ms |
8552 KB |
Output is correct |
| 44 |
Correct |
30 ms |
7692 KB |
Output is correct |
