#include<bits/stdc++.h>
using namespace std;
using ll = long long;
const int N=2e5+5;
const int INF=INT_MAX/2;
int n,m;
int a[N];
vector<int> adj[N];
int dist1[N],dist2[N];
int ans=INF;
void dijkstra(int st,int *dist){
priority_queue<pair<int,int>,vector<pair<int,int>>,greater<pair<int,int>>> pq;
for(int i=1;i<=n;i++)dist[i]=INF;
dist[st]=0;
pq.emplace(0,st);
while(!pq.empty()){
auto [d,u]=pq.top();
pq.pop();
if(d>dist[u])continue;
for(auto v:adj[u]){
int nd=max(d+1,a[v]);
if(nd<dist[v]){
dist[v]=nd;
pq.emplace(nd,v);
}
}
}
}
int main(){
cin.tie(nullptr)->sync_with_stdio(false);
cin >> n >> m;
for(int i=1;i<=n;i++){
cin >> a[i];
}
for(int i=0;i<m;i++){
int u,v;
cin >> u >> v;
adj[u].emplace_back(v);
adj[v].emplace_back(u);
}
dijkstra(1,dist1);
dijkstra(n,dist2);
for(int i=1;i<=n;i++){
ans=min(ans,max(dist1[i],dist2[i])*2);
}
for(int u=1;u<=n;u++){
for(auto v:adj[u]){
ans=min(ans,max(dist1[u],dist2[v])*2+1);
}
}
cout << ans;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
6480 KB |
Output is correct |
| 2 |
Correct |
51 ms |
13584 KB |
Output is correct |
| 3 |
Correct |
61 ms |
13580 KB |
Output is correct |
| 4 |
Correct |
55 ms |
13644 KB |
Output is correct |
| 5 |
Correct |
55 ms |
13580 KB |
Output is correct |
| 6 |
Correct |
55 ms |
13640 KB |
Output is correct |
| 7 |
Correct |
63 ms |
13644 KB |
Output is correct |
| 8 |
Correct |
2 ms |
6652 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
2 ms |
6480 KB |
Output is correct |
| 2 |
Correct |
2 ms |
6480 KB |
Output is correct |
| 3 |
Correct |
2 ms |
6480 KB |
Output is correct |
| 4 |
Correct |
2 ms |
6652 KB |
Output is correct |
| 5 |
Correct |
2 ms |
6480 KB |
Output is correct |
| 6 |
Correct |
2 ms |
6592 KB |
Output is correct |
| 7 |
Correct |
3 ms |
6480 KB |
Output is correct |
| 8 |
Correct |
3 ms |
6480 KB |
Output is correct |
| 9 |
Correct |
3 ms |
6480 KB |
Output is correct |
| 10 |
Correct |
3 ms |
6480 KB |
Output is correct |
| 11 |
Correct |
3 ms |
6480 KB |
Output is correct |
| 12 |
Correct |
3 ms |
6480 KB |
Output is correct |
| 13 |
Correct |
2 ms |
6480 KB |
Output is correct |
| 14 |
Correct |
3 ms |
6588 KB |
Output is correct |
| 15 |
Correct |
3 ms |
6736 KB |
Output is correct |
| 16 |
Correct |
3 ms |
6480 KB |
Output is correct |
| 17 |
Correct |
3 ms |
6584 KB |
Output is correct |
| 18 |
Correct |
2 ms |
6480 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
2 ms |
6480 KB |
Output is correct |
| 2 |
Correct |
2 ms |
6480 KB |
Output is correct |
| 3 |
Correct |
2 ms |
6480 KB |
Output is correct |
| 4 |
Correct |
2 ms |
6652 KB |
Output is correct |
| 5 |
Correct |
2 ms |
6480 KB |
Output is correct |
| 6 |
Correct |
2 ms |
6592 KB |
Output is correct |
| 7 |
Correct |
3 ms |
6480 KB |
Output is correct |
| 8 |
Correct |
3 ms |
6480 KB |
Output is correct |
| 9 |
Correct |
3 ms |
6480 KB |
Output is correct |
| 10 |
Correct |
3 ms |
6480 KB |
Output is correct |
| 11 |
Correct |
3 ms |
6480 KB |
Output is correct |
| 12 |
Correct |
3 ms |
6480 KB |
Output is correct |
| 13 |
Correct |
2 ms |
6480 KB |
Output is correct |
| 14 |
Correct |
3 ms |
6588 KB |
Output is correct |
| 15 |
Correct |
3 ms |
6736 KB |
Output is correct |
| 16 |
Correct |
3 ms |
6480 KB |
Output is correct |
| 17 |
Correct |
3 ms |
6584 KB |
Output is correct |
| 18 |
Correct |
2 ms |
6480 KB |
Output is correct |
| 19 |
Correct |
3 ms |
6480 KB |
Output is correct |
| 20 |
Correct |
2 ms |
6692 KB |
Output is correct |
| 21 |
Correct |
2 ms |
6480 KB |
Output is correct |
| 22 |
Correct |
2 ms |
6480 KB |
Output is correct |
| 23 |
Correct |
3 ms |
6648 KB |
Output is correct |
| 24 |
Correct |
2 ms |
6480 KB |
Output is correct |
| 25 |
Correct |
3 ms |
6480 KB |
Output is correct |
| 26 |
Correct |
3 ms |
6480 KB |
Output is correct |
| 27 |
Correct |
3 ms |
6480 KB |
Output is correct |
| 28 |
Correct |
3 ms |
6736 KB |
Output is correct |
| 29 |
Correct |
3 ms |
6908 KB |
Output is correct |
| 30 |
Correct |
3 ms |
6736 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
6480 KB |
Output is correct |
| 2 |
Correct |
51 ms |
13584 KB |
Output is correct |
| 3 |
Correct |
61 ms |
13580 KB |
Output is correct |
| 4 |
Correct |
55 ms |
13644 KB |
Output is correct |
| 5 |
Correct |
55 ms |
13580 KB |
Output is correct |
| 6 |
Correct |
55 ms |
13640 KB |
Output is correct |
| 7 |
Correct |
63 ms |
13644 KB |
Output is correct |
| 8 |
Correct |
2 ms |
6652 KB |
Output is correct |
| 9 |
Correct |
2 ms |
6480 KB |
Output is correct |
| 10 |
Correct |
2 ms |
6480 KB |
Output is correct |
| 11 |
Correct |
2 ms |
6480 KB |
Output is correct |
| 12 |
Correct |
2 ms |
6652 KB |
Output is correct |
| 13 |
Correct |
2 ms |
6480 KB |
Output is correct |
| 14 |
Correct |
2 ms |
6592 KB |
Output is correct |
| 15 |
Correct |
3 ms |
6480 KB |
Output is correct |
| 16 |
Correct |
3 ms |
6480 KB |
Output is correct |
| 17 |
Correct |
3 ms |
6480 KB |
Output is correct |
| 18 |
Correct |
3 ms |
6480 KB |
Output is correct |
| 19 |
Correct |
3 ms |
6480 KB |
Output is correct |
| 20 |
Correct |
3 ms |
6480 KB |
Output is correct |
| 21 |
Correct |
2 ms |
6480 KB |
Output is correct |
| 22 |
Correct |
3 ms |
6588 KB |
Output is correct |
| 23 |
Correct |
3 ms |
6736 KB |
Output is correct |
| 24 |
Correct |
3 ms |
6480 KB |
Output is correct |
| 25 |
Correct |
3 ms |
6584 KB |
Output is correct |
| 26 |
Correct |
2 ms |
6480 KB |
Output is correct |
| 27 |
Correct |
3 ms |
6480 KB |
Output is correct |
| 28 |
Correct |
2 ms |
6692 KB |
Output is correct |
| 29 |
Correct |
2 ms |
6480 KB |
Output is correct |
| 30 |
Correct |
2 ms |
6480 KB |
Output is correct |
| 31 |
Correct |
3 ms |
6648 KB |
Output is correct |
| 32 |
Correct |
2 ms |
6480 KB |
Output is correct |
| 33 |
Correct |
3 ms |
6480 KB |
Output is correct |
| 34 |
Correct |
3 ms |
6480 KB |
Output is correct |
| 35 |
Correct |
3 ms |
6480 KB |
Output is correct |
| 36 |
Correct |
3 ms |
6736 KB |
Output is correct |
| 37 |
Correct |
3 ms |
6908 KB |
Output is correct |
| 38 |
Correct |
3 ms |
6736 KB |
Output is correct |
| 39 |
Correct |
111 ms |
13636 KB |
Output is correct |
| 40 |
Correct |
81 ms |
13648 KB |
Output is correct |
| 41 |
Correct |
87 ms |
13640 KB |
Output is correct |
| 42 |
Correct |
90 ms |
13592 KB |
Output is correct |
| 43 |
Correct |
78 ms |
13640 KB |
Output is correct |
| 44 |
Correct |
73 ms |
13640 KB |
Output is correct |
| 45 |
Correct |
82 ms |
13676 KB |
Output is correct |
| 46 |
Correct |
79 ms |
13640 KB |
Output is correct |
| 47 |
Correct |
76 ms |
13780 KB |
Output is correct |
| 48 |
Correct |
83 ms |
13640 KB |
Output is correct |
| 49 |
Correct |
113 ms |
13660 KB |
Output is correct |
| 50 |
Correct |
93 ms |
13640 KB |
Output is correct |
| 51 |
Correct |
89 ms |
13640 KB |
Output is correct |
| 52 |
Correct |
154 ms |
15348 KB |
Output is correct |
| 53 |
Correct |
145 ms |
15352 KB |
Output is correct |
| 54 |
Correct |
177 ms |
15328 KB |
Output is correct |
| 55 |
Correct |
148 ms |
15348 KB |
Output is correct |
| 56 |
Correct |
181 ms |
17472 KB |
Output is correct |
| 57 |
Correct |
190 ms |
17464 KB |
Output is correct |
| 58 |
Correct |
177 ms |
17468 KB |
Output is correct |
| 59 |
Correct |
208 ms |
17564 KB |
Output is correct |
| 60 |
Correct |
179 ms |
17512 KB |
Output is correct |
| 61 |
Correct |
218 ms |
17468 KB |
Output is correct |
| 62 |
Correct |
172 ms |
17328 KB |
Output is correct |
| 63 |
Correct |
154 ms |
17492 KB |
Output is correct |
| 64 |
Correct |
162 ms |
17484 KB |
Output is correct |
| 65 |
Correct |
170 ms |
17484 KB |
Output is correct |
| 66 |
Correct |
172 ms |
17444 KB |
Output is correct |
| 67 |
Correct |
182 ms |
17464 KB |
Output is correct |
