답안 #334471

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
334471	2020-12-09T07:50:48 Z	ncduy0303	Hotspot (NOI17_hotspot)	C++17	100 / 100	827 ms	250988 KB

hotspot

#include <bits/stdc++.h>

using namespace std;

#define ar array
#define ll long long

const int MAX_N = 5e3 + 1;
const int MOD = 1e9 + 7;
const int INF = 1e9;
const ll LINF = 1e18;

int n, m, k;
vector<int> adj[MAX_N];
ll dist[MAX_N][MAX_N], cnt[MAX_N][MAX_N];
double p[MAX_N];

void bfs(int s) {
	queue<ar<int,2>> q;
	q.push({0, s});
	dist[s][s] = 0; cnt[s][s] = 1;
	while (!q.empty()){
		auto [d, u] = q.front(); q.pop();
		if (d > dist[s][u]) continue;
		for (int v : adj[u]) {
			if (dist[s][v] > dist[s][u] + 1) { 
				dist[s][v] = dist[s][u] + 1;
                cnt[s][v] = cnt[s][u];
				q.push({dist[s][v], v});
			}
			else if (dist[s][v] == dist[s][u] + 1) {
                cnt[s][v] += cnt[s][u];
            }
		}
	}
}

void solve() {
    cin >> n >> m;
    for (int i = 0; i < m; i++) {
        int u, v; cin >> u >> v;
        adj[u].push_back(v);
        adj[v].push_back(u);
    }
    memset(dist, 0x3f, sizeof dist);
    cin >> k;
    while (k--) {
        int u, v; cin >> u >> v;
        if (dist[u][u] > 0) bfs(u);
        if (dist[v][v] > 0) bfs(v);
        for (int i = 0; i < n; i++) {
            if (dist[u][v] == dist[u][i] + dist[v][i]) {
                p[i] += (double)(cnt[u][i] * cnt[v][i]) / cnt[u][v];
            }
        }
    }
    int ans = 0;
    for (int i = 0; i < n; i++) {
        if (p[i] > p[ans]) {
            ans = i;
        }
    }
    cout << ans << "\n";
}

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    // freopen("input.txt", "r", stdin);
    // freopen("output.txt", "w", stdout);

    int tc = 1;
    // cin >> tc;
    for (int t = 1; t <= tc; t++) {
        // cout << "Case #" << t  << ": ";
        solve();
    }
}

Compilation message

hotspot.cpp: In function 'void bfs(int)':
hotspot.cpp:29:22: warning: narrowing conversion of 'dist[s][v]' from 'long long int' to 'int' [-Wnarrowing]
   29 |     q.push({dist[s][v], v});
      |             ~~~~~~~~~^

Subtask #1
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	105 ms	196332 KB	Output is correct
2	Correct	106 ms	196332 KB	Output is correct
3	Correct	105 ms	196332 KB	Output is correct
4	Correct	107 ms	196204 KB	Output is correct
5	Correct	105 ms	196260 KB	Output is correct
6	Correct	103 ms	196224 KB	Output is correct
7	Correct	104 ms	196344 KB	Output is correct

Subtask #2
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	105 ms	196332 KB	Output is correct
2	Correct	106 ms	196332 KB	Output is correct
3	Correct	105 ms	196332 KB	Output is correct
4	Correct	107 ms	196204 KB	Output is correct
5	Correct	105 ms	196260 KB	Output is correct
6	Correct	103 ms	196224 KB	Output is correct
7	Correct	104 ms	196344 KB	Output is correct
8	Correct	104 ms	196204 KB	Output is correct
9	Correct	108 ms	196332 KB	Output is correct
10	Correct	106 ms	196460 KB	Output is correct
11	Correct	104 ms	196204 KB	Output is correct
12	Correct	104 ms	196204 KB	Output is correct
13	Correct	105 ms	196204 KB	Output is correct
14	Correct	115 ms	196332 KB	Output is correct

Subtask #3
11.0 / 11.0

#	결과	실행 시간	메모리	Grader output
1	Correct	105 ms	196332 KB	Output is correct
2	Correct	106 ms	196332 KB	Output is correct
3	Correct	105 ms	196332 KB	Output is correct
4	Correct	107 ms	196204 KB	Output is correct
5	Correct	105 ms	196260 KB	Output is correct
6	Correct	103 ms	196224 KB	Output is correct
7	Correct	104 ms	196344 KB	Output is correct
8	Correct	107 ms	196844 KB	Output is correct
9	Correct	105 ms	197100 KB	Output is correct
10	Correct	107 ms	197228 KB	Output is correct
11	Correct	111 ms	197868 KB	Output is correct
12	Correct	105 ms	196716 KB	Output is correct
13	Correct	104 ms	196460 KB	Output is correct
14	Correct	108 ms	197612 KB	Output is correct

Subtask #4
18.0 / 18.0

#	결과	실행 시간	메모리	Grader output
1	Correct	105 ms	196332 KB	Output is correct
2	Correct	106 ms	196332 KB	Output is correct
3	Correct	105 ms	196332 KB	Output is correct
4	Correct	107 ms	196204 KB	Output is correct
5	Correct	105 ms	196260 KB	Output is correct
6	Correct	103 ms	196224 KB	Output is correct
7	Correct	104 ms	196344 KB	Output is correct
8	Correct	104 ms	196204 KB	Output is correct
9	Correct	108 ms	196332 KB	Output is correct
10	Correct	106 ms	196460 KB	Output is correct
11	Correct	104 ms	196204 KB	Output is correct
12	Correct	104 ms	196204 KB	Output is correct
13	Correct	105 ms	196204 KB	Output is correct
14	Correct	115 ms	196332 KB	Output is correct
15	Correct	107 ms	196844 KB	Output is correct
16	Correct	105 ms	197100 KB	Output is correct
17	Correct	107 ms	197228 KB	Output is correct
18	Correct	111 ms	197868 KB	Output is correct
19	Correct	105 ms	196716 KB	Output is correct
20	Correct	104 ms	196460 KB	Output is correct
21	Correct	108 ms	197612 KB	Output is correct
22	Correct	106 ms	196844 KB	Output is correct
23	Correct	106 ms	196972 KB	Output is correct
24	Correct	107 ms	197356 KB	Output is correct
25	Correct	109 ms	197996 KB	Output is correct
26	Correct	110 ms	198052 KB	Output is correct
27	Correct	105 ms	196844 KB	Output is correct
28	Correct	107 ms	197996 KB	Output is correct

Subtask #5
26.0 / 26.0

#	결과	실행 시간	메모리	Grader output
1	Correct	105 ms	196332 KB	Output is correct
2	Correct	106 ms	196332 KB	Output is correct
3	Correct	105 ms	196332 KB	Output is correct
4	Correct	107 ms	196204 KB	Output is correct
5	Correct	105 ms	196260 KB	Output is correct
6	Correct	103 ms	196224 KB	Output is correct
7	Correct	104 ms	196344 KB	Output is correct
8	Correct	104 ms	196204 KB	Output is correct
9	Correct	108 ms	196332 KB	Output is correct
10	Correct	106 ms	196460 KB	Output is correct
11	Correct	104 ms	196204 KB	Output is correct
12	Correct	104 ms	196204 KB	Output is correct
13	Correct	105 ms	196204 KB	Output is correct
14	Correct	115 ms	196332 KB	Output is correct
15	Correct	107 ms	196460 KB	Output is correct
16	Correct	111 ms	196332 KB	Output is correct
17	Correct	108 ms	196880 KB	Output is correct
18	Correct	106 ms	196716 KB	Output is correct
19	Correct	109 ms	196844 KB	Output is correct
20	Correct	107 ms	196416 KB	Output is correct
21	Correct	105 ms	196332 KB	Output is correct

Subtask #6
36.0 / 36.0

#	결과	실행 시간	메모리	Grader output
1	Correct	105 ms	196332 KB	Output is correct
2	Correct	106 ms	196332 KB	Output is correct
3	Correct	105 ms	196332 KB	Output is correct
4	Correct	107 ms	196204 KB	Output is correct
5	Correct	105 ms	196260 KB	Output is correct
6	Correct	103 ms	196224 KB	Output is correct
7	Correct	104 ms	196344 KB	Output is correct
8	Correct	104 ms	196204 KB	Output is correct
9	Correct	108 ms	196332 KB	Output is correct
10	Correct	106 ms	196460 KB	Output is correct
11	Correct	104 ms	196204 KB	Output is correct
12	Correct	104 ms	196204 KB	Output is correct
13	Correct	105 ms	196204 KB	Output is correct
14	Correct	115 ms	196332 KB	Output is correct
15	Correct	107 ms	196844 KB	Output is correct
16	Correct	105 ms	197100 KB	Output is correct
17	Correct	107 ms	197228 KB	Output is correct
18	Correct	111 ms	197868 KB	Output is correct
19	Correct	105 ms	196716 KB	Output is correct
20	Correct	104 ms	196460 KB	Output is correct
21	Correct	108 ms	197612 KB	Output is correct
22	Correct	106 ms	196844 KB	Output is correct
23	Correct	106 ms	196972 KB	Output is correct
24	Correct	107 ms	197356 KB	Output is correct
25	Correct	109 ms	197996 KB	Output is correct
26	Correct	110 ms	198052 KB	Output is correct
27	Correct	105 ms	196844 KB	Output is correct
28	Correct	107 ms	197996 KB	Output is correct
29	Correct	107 ms	196460 KB	Output is correct
30	Correct	111 ms	196332 KB	Output is correct
31	Correct	108 ms	196880 KB	Output is correct
32	Correct	106 ms	196716 KB	Output is correct
33	Correct	109 ms	196844 KB	Output is correct
34	Correct	107 ms	196416 KB	Output is correct
35	Correct	105 ms	196332 KB	Output is correct
36	Correct	130 ms	197612 KB	Output is correct
37	Correct	219 ms	207084 KB	Output is correct
38	Correct	827 ms	250988 KB	Output is correct
39	Correct	250 ms	204012 KB	Output is correct
40	Correct	204 ms	209900 KB	Output is correct
41	Correct	625 ms	242156 KB	Output is correct
42	Correct	394 ms	212844 KB	Output is correct
43	Correct	147 ms	202988 KB	Output is correct
44	Correct	144 ms	202348 KB	Output is correct

답안 #334471

Compilation message

Subtask #1 4.0 / 4.0

Subtask #2 5.0 / 5.0

Subtask #3 11.0 / 11.0

Subtask #4 18.0 / 18.0

Subtask #5 26.0 / 26.0

Subtask #6 36.0 / 36.0

Subtask #1
4.0 / 4.0

Subtask #2
5.0 / 5.0

Subtask #3
11.0 / 11.0

Subtask #4
18.0 / 18.0

Subtask #5
26.0 / 26.0

Subtask #6
36.0 / 36.0