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Submission #253211

# Submission time Handle Problem Language Result Execution time Memory
253211 2020-07-27T12:13:48 Z nandonathaniel Hotspot (NOI17_hotspot) C++14
100 / 100
 1426 ms 154944 KB 
#include<bits/stdc++.h>
using namespace std;
const int INF=1e9;
vector<int> adj[5005];
int dist[5005][5005],cara[5005][5005],ret[5005];
double byk[5005];
bool flag[5005];
int a[2005],b[2005];

int main(){
	ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    int N,M,u,v,K;
    cin >> N >> M;
    for(int i=1;i<=M;i++){
    	cin >> u >> v;
    	adj[u].push_back(v);
    	adj[v].push_back(u);
	}
	for(int i=0;i<N;i++){
		memset(flag,false,sizeof(flag));
		for(int j=0;j<N;j++){
			dist[i][j]=INF;
		}
		cara[i][i]=1;
		dist[i][i]=0;
		queue<int> Q;
		Q.push(i);
		while(!Q.empty()){
			int s=Q.front();
			Q.pop();
			for(int j=0;j<adj[s].size();j++){
				int t=adj[s][j];
				if(!flag[t]){
					if(dist[i][t]>dist[i][s]+1){
						dist[i][t]=dist[i][s]+1;
						cara[i][t]+=cara[i][s];
						flag[t]=true;
						Q.push(t);
					}
				}
				else{
					if(dist[i][s]+1==dist[i][t]){
						cara[i][t]+=cara[i][s];
					}
				}
			}
		}
	}
	cin >> K;
	for(int i=1;i<=K;i++){
		cin >> a[i] >> b[i];
		memset(ret,0,sizeof(ret));
		for(int j=0;j<N;j++){
			if(dist[a[i]][j]+dist[j][b[i]]==dist[a[i]][b[i]]){
				ret[j]=(cara[a[i]][j]*cara[j][b[i]]);
				byk[j]+=(double)ret[j]/cara[a[i]][b[i]];
			}
		}
	}
	double maxi=-1.0;
	int ans;
	for(int i=0;i<N;i++){
		if(byk[i]>maxi){
			maxi=byk[i];
			ans=i;
		}
	}
	cout << ans << endl;
	return 0;
}

Compilation message

hotspot.cpp: In function 'int main()':
hotspot.cpp:33:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(int j=0;j<adj[s].size();j++){
                ~^~~~~~~~~~~~~~
hotspot.cpp:70:10: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized]
  cout << ans << endl;
          ^~~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 6784 KB Output is correct
2 Correct 17 ms 12160 KB Output is correct
3 Correct 14 ms 10752 KB Output is correct
4 Correct 1 ms 640 KB Output is correct
5 Correct 4 ms 3712 KB Output is correct
6 Correct 3 ms 2944 KB Output is correct
7 Correct 8 ms 6912 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 6784 KB Output is correct
2 Correct 17 ms 12160 KB Output is correct
3 Correct 14 ms 10752 KB Output is correct
4 Correct 1 ms 640 KB Output is correct
5 Correct 4 ms 3712 KB Output is correct
6 Correct 3 ms 2944 KB Output is correct
7 Correct 8 ms 6912 KB Output is correct
8 Correct 3 ms 2944 KB Output is correct
9 Correct 10 ms 7040 KB Output is correct
10 Correct 21 ms 12416 KB Output is correct
11 Correct 1 ms 1408 KB Output is correct
12 Correct 1 ms 896 KB Output is correct
13 Correct 4 ms 3968 KB Output is correct
14 Correct 13 ms 8448 KB Output is correct

Subtask #3
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 6784 KB Output is correct
2 Correct 17 ms 12160 KB Output is correct
3 Correct 14 ms 10752 KB Output is correct
4 Correct 1 ms 640 KB Output is correct
5 Correct 4 ms 3712 KB Output is correct
6 Correct 3 ms 2944 KB Output is correct
7 Correct 8 ms 6912 KB Output is correct
8 Correct 4 ms 4096 KB Output is correct
9 Correct 10 ms 8448 KB Output is correct
10 Correct 9 ms 7296 KB Output is correct
11 Correct 19 ms 12800 KB Output is correct
12 Correct 1 ms 1664 KB Output is correct
13 Correct 1 ms 1024 KB Output is correct
14 Correct 4 ms 4096 KB Output is correct

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 6784 KB Output is correct
2 Correct 17 ms 12160 KB Output is correct
3 Correct 14 ms 10752 KB Output is correct
4 Correct 1 ms 640 KB Output is correct
5 Correct 4 ms 3712 KB Output is correct
6 Correct 3 ms 2944 KB Output is correct
7 Correct 8 ms 6912 KB Output is correct
8 Correct 3 ms 2944 KB Output is correct
9 Correct 10 ms 7040 KB Output is correct
10 Correct 21 ms 12416 KB Output is correct
11 Correct 1 ms 1408 KB Output is correct
12 Correct 1 ms 896 KB Output is correct
13 Correct 4 ms 3968 KB Output is correct
14 Correct 13 ms 8448 KB Output is correct
15 Correct 4 ms 4096 KB Output is correct
16 Correct 10 ms 8448 KB Output is correct
17 Correct 9 ms 7296 KB Output is correct
18 Correct 19 ms 12800 KB Output is correct
19 Correct 1 ms 1664 KB Output is correct
20 Correct 1 ms 1024 KB Output is correct
21 Correct 4 ms 4096 KB Output is correct
22 Correct 7 ms 5248 KB Output is correct
23 Correct 5 ms 4224 KB Output is correct
24 Correct 16 ms 8832 KB Output is correct
25 Correct 27 ms 14584 KB Output is correct
26 Correct 23 ms 13056 KB Output is correct
27 Correct 2 ms 1792 KB Output is correct
28 Correct 7 ms 5376 KB Output is correct

Subtask #5
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 6784 KB Output is correct
2 Correct 17 ms 12160 KB Output is correct
3 Correct 14 ms 10752 KB Output is correct
4 Correct 1 ms 640 KB Output is correct
5 Correct 4 ms 3712 KB Output is correct
6 Correct 3 ms 2944 KB Output is correct
7 Correct 8 ms 6912 KB Output is correct
8 Correct 3 ms 2944 KB Output is correct
9 Correct 10 ms 7040 KB Output is correct
10 Correct 21 ms 12416 KB Output is correct
11 Correct 1 ms 1408 KB Output is correct
12 Correct 1 ms 896 KB Output is correct
13 Correct 4 ms 3968 KB Output is correct
14 Correct 13 ms 8448 KB Output is correct
15 Correct 13 ms 1920 KB Output is correct
16 Correct 17 ms 5428 KB Output is correct
17 Correct 62 ms 10488 KB Output is correct
18 Correct 30 ms 9088 KB Output is correct
19 Correct 75 ms 14968 KB Output is correct
20 Correct 13 ms 2816 KB Output is correct
21 Correct 3 ms 1920 KB Output is correct

Subtask #6
36.0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 6784 KB Output is correct
2 Correct 17 ms 12160 KB Output is correct
3 Correct 14 ms 10752 KB Output is correct
4 Correct 1 ms 640 KB Output is correct
5 Correct 4 ms 3712 KB Output is correct
6 Correct 3 ms 2944 KB Output is correct
7 Correct 8 ms 6912 KB Output is correct
8 Correct 3 ms 2944 KB Output is correct
9 Correct 10 ms 7040 KB Output is correct
10 Correct 21 ms 12416 KB Output is correct
11 Correct 1 ms 1408 KB Output is correct
12 Correct 1 ms 896 KB Output is correct
13 Correct 4 ms 3968 KB Output is correct
14 Correct 13 ms 8448 KB Output is correct
15 Correct 4 ms 4096 KB Output is correct
16 Correct 10 ms 8448 KB Output is correct
17 Correct 9 ms 7296 KB Output is correct
18 Correct 19 ms 12800 KB Output is correct
19 Correct 1 ms 1664 KB Output is correct
20 Correct 1 ms 1024 KB Output is correct
21 Correct 4 ms 4096 KB Output is correct
22 Correct 7 ms 5248 KB Output is correct
23 Correct 5 ms 4224 KB Output is correct
24 Correct 16 ms 8832 KB Output is correct
25 Correct 27 ms 14584 KB Output is correct
26 Correct 23 ms 13056 KB Output is correct
27 Correct 2 ms 1792 KB Output is correct
28 Correct 7 ms 5376 KB Output is correct
29 Correct 13 ms 1920 KB Output is correct
30 Correct 17 ms 5428 KB Output is correct
31 Correct 62 ms 10488 KB Output is correct
32 Correct 30 ms 9088 KB Output is correct
33 Correct 75 ms 14968 KB Output is correct
34 Correct 13 ms 2816 KB Output is correct
35 Correct 3 ms 1920 KB Output is correct
36 Correct 36 ms 2936 KB Output is correct
37 Correct 176 ms 20668 KB Output is correct
38 Correct 1334 ms 121764 KB Output is correct
39 Correct 165 ms 11388 KB Output is correct
40 Correct 528 ms 96248 KB Output is correct
41 Correct 1426 ms 154944 KB Output is correct
42 Correct 330 ms 23288 KB Output is correct
43 Correct 226 ms 48148 KB Output is correct
44 Correct 222 ms 48120 KB Output is correct