#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = double;
#define MAXN (1000005)
int main(){
ios_base::sync_with_stdio(false);cin.tie(0);
ll N,M;
cin>>N>>M;
vector<ll> v[N];
for(ll i = 0;i < M;i++){
ll a,b;
cin>>a>>b;
v[a].push_back(b);
v[b].push_back(a);
}
ll K;
cin>>K;
pair<ll,ll> arr[K];
for(ll i = 0;i < K;i++){
cin>>arr[i].first>>arr[i].second;
}
queue<ll> q;
ld ans[N];
memset(ans,0,sizeof(ans));
pair<ll,ll> dist1[N];
pair<ll,ll> dist2[N];
for(ll person = 0;person < K;person++){
ll A = arr[person].first;
ll B = arr[person].second;
for(ll i = 0;i < N;i++) dist1[i] = {-1,0};
q.push(A);
dist1[A] = {0,1};
while(!q.empty()){
ll x = q.front();
q.pop();
for(auto u : v[x]){
if(dist1[u].first == -1 || dist1[x].first + 1 < dist1[u].first){
q.push(u);
dist1[u] = {dist1[x].first + 1,dist1[x].second};
}else if(dist1[x].first + 1 == dist1[u].first){
q.push(u);
dist1[u].second += dist1[x].second;
}
}
}
for(ll i = 0;i < N;i++) dist2[i] = {-1,0};
q.push(B);
dist2[B] = {0,1};
while(!q.empty()){
ll x = q.front();
q.pop();
for(auto u : v[x]){
if(dist2[u].first == -1 || dist2[x].first + 1 < dist2[u].first){
q.push(u);
dist2[u] = {dist2[x].first + 1,dist2[x].second};
}else if(dist2[x].first + 1 == dist2[u].first){
q.push(u);
dist2[u].second += dist2[x].second;
}
}
}
for(ll i = 0;i < N;i++){
if(dist1[i].first + dist2[i].first == dist1[B].first){
ans[i] += ld(dist1[i].second * dist2[i].second) / ld(dist1[B].second);
}
}
}
ld maximum = 0;
ll index = 0;
for(ll i = 0;i < N;i++){
if(ans[i] >= maximum){
maximum = ans[i];
index = i;
}
}
cout<<index<<'\n';
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
340 KB |
Output is correct |
| 2 |
Correct |
1 ms |
340 KB |
Output is correct |
| 3 |
Correct |
1 ms |
340 KB |
Output is correct |
| 4 |
Correct |
1 ms |
212 KB |
Output is correct |
| 5 |
Correct |
1 ms |
340 KB |
Output is correct |
| 6 |
Correct |
1 ms |
212 KB |
Output is correct |
| 7 |
Correct |
1 ms |
340 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
340 KB |
Output is correct |
| 2 |
Correct |
1 ms |
340 KB |
Output is correct |
| 3 |
Correct |
1 ms |
340 KB |
Output is correct |
| 4 |
Correct |
1 ms |
212 KB |
Output is correct |
| 5 |
Correct |
1 ms |
340 KB |
Output is correct |
| 6 |
Correct |
1 ms |
212 KB |
Output is correct |
| 7 |
Correct |
1 ms |
340 KB |
Output is correct |
| 8 |
Correct |
1 ms |
340 KB |
Output is correct |
| 9 |
Correct |
1 ms |
320 KB |
Output is correct |
| 10 |
Correct |
1 ms |
340 KB |
Output is correct |
| 11 |
Correct |
1 ms |
212 KB |
Output is correct |
| 12 |
Correct |
1 ms |
316 KB |
Output is correct |
| 13 |
Correct |
1 ms |
340 KB |
Output is correct |
| 14 |
Correct |
1 ms |
340 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
340 KB |
Output is correct |
| 2 |
Correct |
1 ms |
340 KB |
Output is correct |
| 3 |
Correct |
1 ms |
340 KB |
Output is correct |
| 4 |
Correct |
1 ms |
212 KB |
Output is correct |
| 5 |
Correct |
1 ms |
340 KB |
Output is correct |
| 6 |
Correct |
1 ms |
212 KB |
Output is correct |
| 7 |
Correct |
1 ms |
340 KB |
Output is correct |
| 8 |
Correct |
1 ms |
316 KB |
Output is correct |
| 9 |
Correct |
2 ms |
340 KB |
Output is correct |
| 10 |
Correct |
2 ms |
320 KB |
Output is correct |
| 11 |
Correct |
3 ms |
340 KB |
Output is correct |
| 12 |
Correct |
2 ms |
212 KB |
Output is correct |
| 13 |
Correct |
1 ms |
212 KB |
Output is correct |
| 14 |
Correct |
3 ms |
340 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
340 KB |
Output is correct |
| 2 |
Correct |
1 ms |
340 KB |
Output is correct |
| 3 |
Correct |
1 ms |
340 KB |
Output is correct |
| 4 |
Correct |
1 ms |
212 KB |
Output is correct |
| 5 |
Correct |
1 ms |
340 KB |
Output is correct |
| 6 |
Correct |
1 ms |
212 KB |
Output is correct |
| 7 |
Correct |
1 ms |
340 KB |
Output is correct |
| 8 |
Correct |
1 ms |
340 KB |
Output is correct |
| 9 |
Correct |
1 ms |
320 KB |
Output is correct |
| 10 |
Correct |
1 ms |
340 KB |
Output is correct |
| 11 |
Correct |
1 ms |
212 KB |
Output is correct |
| 12 |
Correct |
1 ms |
316 KB |
Output is correct |
| 13 |
Correct |
1 ms |
340 KB |
Output is correct |
| 14 |
Correct |
1 ms |
340 KB |
Output is correct |
| 15 |
Correct |
1 ms |
316 KB |
Output is correct |
| 16 |
Correct |
2 ms |
340 KB |
Output is correct |
| 17 |
Correct |
2 ms |
320 KB |
Output is correct |
| 18 |
Correct |
3 ms |
340 KB |
Output is correct |
| 19 |
Correct |
2 ms |
212 KB |
Output is correct |
| 20 |
Correct |
1 ms |
212 KB |
Output is correct |
| 21 |
Correct |
3 ms |
340 KB |
Output is correct |
| 22 |
Correct |
1 ms |
340 KB |
Output is correct |
| 23 |
Correct |
1 ms |
340 KB |
Output is correct |
| 24 |
Correct |
2 ms |
340 KB |
Output is correct |
| 25 |
Correct |
4 ms |
340 KB |
Output is correct |
| 26 |
Correct |
4 ms |
340 KB |
Output is correct |
| 27 |
Correct |
1 ms |
316 KB |
Output is correct |
| 28 |
Correct |
3 ms |
340 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
340 KB |
Output is correct |
| 2 |
Correct |
1 ms |
340 KB |
Output is correct |
| 3 |
Correct |
1 ms |
340 KB |
Output is correct |
| 4 |
Correct |
1 ms |
212 KB |
Output is correct |
| 5 |
Correct |
1 ms |
340 KB |
Output is correct |
| 6 |
Correct |
1 ms |
212 KB |
Output is correct |
| 7 |
Correct |
1 ms |
340 KB |
Output is correct |
| 8 |
Correct |
1 ms |
340 KB |
Output is correct |
| 9 |
Correct |
1 ms |
320 KB |
Output is correct |
| 10 |
Correct |
1 ms |
340 KB |
Output is correct |
| 11 |
Correct |
1 ms |
212 KB |
Output is correct |
| 12 |
Correct |
1 ms |
316 KB |
Output is correct |
| 13 |
Correct |
1 ms |
340 KB |
Output is correct |
| 14 |
Correct |
1 ms |
340 KB |
Output is correct |
| 15 |
Correct |
4 ms |
552 KB |
Output is correct |
| 16 |
Correct |
1 ms |
340 KB |
Output is correct |
| 17 |
Correct |
10 ms |
596 KB |
Output is correct |
| 18 |
Incorrect |
3 ms |
468 KB |
Output isn't correct |
| 19 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
340 KB |
Output is correct |
| 2 |
Correct |
1 ms |
340 KB |
Output is correct |
| 3 |
Correct |
1 ms |
340 KB |
Output is correct |
| 4 |
Correct |
1 ms |
212 KB |
Output is correct |
| 5 |
Correct |
1 ms |
340 KB |
Output is correct |
| 6 |
Correct |
1 ms |
212 KB |
Output is correct |
| 7 |
Correct |
1 ms |
340 KB |
Output is correct |
| 8 |
Correct |
1 ms |
340 KB |
Output is correct |
| 9 |
Correct |
1 ms |
320 KB |
Output is correct |
| 10 |
Correct |
1 ms |
340 KB |
Output is correct |
| 11 |
Correct |
1 ms |
212 KB |
Output is correct |
| 12 |
Correct |
1 ms |
316 KB |
Output is correct |
| 13 |
Correct |
1 ms |
340 KB |
Output is correct |
| 14 |
Correct |
1 ms |
340 KB |
Output is correct |
| 15 |
Correct |
1 ms |
316 KB |
Output is correct |
| 16 |
Correct |
2 ms |
340 KB |
Output is correct |
| 17 |
Correct |
2 ms |
320 KB |
Output is correct |
| 18 |
Correct |
3 ms |
340 KB |
Output is correct |
| 19 |
Correct |
2 ms |
212 KB |
Output is correct |
| 20 |
Correct |
1 ms |
212 KB |
Output is correct |
| 21 |
Correct |
3 ms |
340 KB |
Output is correct |
| 22 |
Correct |
1 ms |
340 KB |
Output is correct |
| 23 |
Correct |
1 ms |
340 KB |
Output is correct |
| 24 |
Correct |
2 ms |
340 KB |
Output is correct |
| 25 |
Correct |
4 ms |
340 KB |
Output is correct |
| 26 |
Correct |
4 ms |
340 KB |
Output is correct |
| 27 |
Correct |
1 ms |
316 KB |
Output is correct |
| 28 |
Correct |
3 ms |
340 KB |
Output is correct |
| 29 |
Correct |
4 ms |
552 KB |
Output is correct |
| 30 |
Correct |
1 ms |
340 KB |
Output is correct |
| 31 |
Correct |
10 ms |
596 KB |
Output is correct |
| 32 |
Incorrect |
3 ms |
468 KB |
Output isn't correct |
| 33 |
Halted |
0 ms |
0 KB |
- |
