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Submission #619907

# Submission time Handle Problem Language Result Execution time Memory
619907 2022-08-02T17:10:19 Z PoonYaPat Hotspot (NOI17_hotspot) C++14
38 / 100
 79 ms 25936 KB 
#include <bits/stdc++.h>
using namespace std;

int n,m,k,cnt[5001][5001],d[5001][5001],ans_node,x[2001],y[2001];
vector<int> adj[5001];
queue<int> q;
long double ans;

void bfs(int x) {
    memset(d[x],0x3f,sizeof(d[x]));

    q.push(x);
    d[x][x]=0;
    cnt[x][x]=1;

    while (!q.empty()) {
        int a=q.front();
        q.pop();

        for (auto s : adj[a]) {
            if (d[x][s]>d[x][a]+1) {
                d[x][s]=d[x][a]+1;
                cnt[x][s]+=cnt[x][a];
                q.push(s);
            } else if (d[x][s]==d[x][a]+1) cnt[x][s]+=cnt[x][a];
        }
    }
}

int main() {
    ios_base::sync_with_stdio(0); cin.tie(0);
    cin>>n>>m;
    for (int i=0; i<m; ++i) {
        int a,b;
        cin>>a>>b;
        adj[a].push_back(b);
        adj[b].push_back(a);
    }
    cin>>k;
    for (int i=0; i<k; ++i) cin>>x[i]>>y[i];
    for (int i=0; i<n; ++i) bfs(i);
    for (int i=0; i<n; ++i) {
        long double sum=0;
        for (int j=0; j<k; ++j) {
            if (d[x[j]][i]+d[i][y[j]]==d[x[j]][y[j]]) {
                sum+=(cnt[x[j]][i]*cnt[i][y[j]])/cnt[x[j]][y[j]];
            }
        }
        if (sum>ans) ans_node=i,ans=sum;
    }
    cout<<ans_node;
}

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 13764 KB Output is correct
2 Correct 17 ms 21956 KB Output is correct
3 Correct 16 ms 20072 KB Output is correct
4 Correct 1 ms 980 KB Output is correct
5 Correct 5 ms 8020 KB Output is correct
6 Correct 4 ms 6336 KB Output is correct
7 Correct 12 ms 14036 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 13764 KB Output is correct
2 Correct 17 ms 21956 KB Output is correct
3 Correct 16 ms 20072 KB Output is correct
4 Correct 1 ms 980 KB Output is correct
5 Correct 5 ms 8020 KB Output is correct
6 Correct 4 ms 6336 KB Output is correct
7 Correct 12 ms 14036 KB Output is correct
8 Correct 4 ms 6612 KB Output is correct
9 Correct 12 ms 14164 KB Output is correct
10 Correct 25 ms 22512 KB Output is correct
11 Correct 2 ms 2900 KB Output is correct
12 Correct 1 ms 1348 KB Output is correct
13 Correct 5 ms 8532 KB Output is correct
14 Correct 14 ms 16432 KB Output is correct

Subtask #3
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 13764 KB Output is correct
2 Correct 17 ms 21956 KB Output is correct
3 Correct 16 ms 20072 KB Output is correct
4 Correct 1 ms 980 KB Output is correct
5 Correct 5 ms 8020 KB Output is correct
6 Correct 4 ms 6336 KB Output is correct
7 Correct 12 ms 14036 KB Output is correct
8 Correct 5 ms 8660 KB Output is correct
9 Correct 12 ms 16468 KB Output is correct
10 Correct 11 ms 14660 KB Output is correct
11 Correct 23 ms 22848 KB Output is correct
12 Correct 2 ms 3284 KB Output is correct
13 Correct 1 ms 1728 KB Output is correct
14 Correct 6 ms 8896 KB Output is correct

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 13764 KB Output is correct
2 Correct 17 ms 21956 KB Output is correct
3 Correct 16 ms 20072 KB Output is correct
4 Correct 1 ms 980 KB Output is correct
5 Correct 5 ms 8020 KB Output is correct
6 Correct 4 ms 6336 KB Output is correct
7 Correct 12 ms 14036 KB Output is correct
8 Correct 4 ms 6612 KB Output is correct
9 Correct 12 ms 14164 KB Output is correct
10 Correct 25 ms 22512 KB Output is correct
11 Correct 2 ms 2900 KB Output is correct
12 Correct 1 ms 1348 KB Output is correct
13 Correct 5 ms 8532 KB Output is correct
14 Correct 14 ms 16432 KB Output is correct
15 Correct 5 ms 8660 KB Output is correct
16 Correct 12 ms 16468 KB Output is correct
17 Correct 11 ms 14660 KB Output is correct
18 Correct 23 ms 22848 KB Output is correct
19 Correct 2 ms 3284 KB Output is correct
20 Correct 1 ms 1728 KB Output is correct
21 Correct 6 ms 8896 KB Output is correct
22 Correct 8 ms 10940 KB Output is correct
23 Correct 8 ms 9076 KB Output is correct
24 Correct 17 ms 16960 KB Output is correct
25 Correct 27 ms 25364 KB Output is correct
26 Correct 23 ms 23344 KB Output is correct
27 Correct 3 ms 3668 KB Output is correct
28 Correct 10 ms 11092 KB Output is correct

Subtask #5
0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 13764 KB Output is correct
2 Correct 17 ms 21956 KB Output is correct
3 Correct 16 ms 20072 KB Output is correct
4 Correct 1 ms 980 KB Output is correct
5 Correct 5 ms 8020 KB Output is correct
6 Correct 4 ms 6336 KB Output is correct
7 Correct 12 ms 14036 KB Output is correct
8 Correct 4 ms 6612 KB Output is correct
9 Correct 12 ms 14164 KB Output is correct
10 Correct 25 ms 22512 KB Output is correct
11 Correct 2 ms 2900 KB Output is correct
12 Correct 1 ms 1348 KB Output is correct
13 Correct 5 ms 8532 KB Output is correct
14 Correct 14 ms 16432 KB Output is correct
15 Correct 11 ms 4104 KB Output is correct
16 Correct 17 ms 11384 KB Output is correct
17 Correct 52 ms 19404 KB Output is correct
18 Correct 30 ms 17416 KB Output is correct
19 Correct 79 ms 25936 KB Output is correct
20 Incorrect 10 ms 5972 KB Output isn't correct
21 Halted 0 ms 0 KB -

Subtask #6
0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 13764 KB Output is correct
2 Correct 17 ms 21956 KB Output is correct
3 Correct 16 ms 20072 KB Output is correct
4 Correct 1 ms 980 KB Output is correct
5 Correct 5 ms 8020 KB Output is correct
6 Correct 4 ms 6336 KB Output is correct
7 Correct 12 ms 14036 KB Output is correct
8 Correct 4 ms 6612 KB Output is correct
9 Correct 12 ms 14164 KB Output is correct
10 Correct 25 ms 22512 KB Output is correct
11 Correct 2 ms 2900 KB Output is correct
12 Correct 1 ms 1348 KB Output is correct
13 Correct 5 ms 8532 KB Output is correct
14 Correct 14 ms 16432 KB Output is correct
15 Correct 5 ms 8660 KB Output is correct
16 Correct 12 ms 16468 KB Output is correct
17 Correct 11 ms 14660 KB Output is correct
18 Correct 23 ms 22848 KB Output is correct
19 Correct 2 ms 3284 KB Output is correct
20 Correct 1 ms 1728 KB Output is correct
21 Correct 6 ms 8896 KB Output is correct
22 Correct 8 ms 10940 KB Output is correct
23 Correct 8 ms 9076 KB Output is correct
24 Correct 17 ms 16960 KB Output is correct
25 Correct 27 ms 25364 KB Output is correct
26 Correct 23 ms 23344 KB Output is correct
27 Correct 3 ms 3668 KB Output is correct
28 Correct 10 ms 11092 KB Output is correct
29 Correct 11 ms 4104 KB Output is correct
30 Correct 17 ms 11384 KB Output is correct
31 Correct 52 ms 19404 KB Output is correct
32 Correct 30 ms 17416 KB Output is correct
33 Correct 79 ms 25936 KB Output is correct
34 Incorrect 10 ms 5972 KB Output isn't correct
35 Halted 0 ms 0 KB -