#include <bits/stdc++.h>
using namespace std;
mt19937 rng(chrono::steady_clock().now().time_since_epoch().count());
typedef long long ll;
int n,m,s,d,a,b;
vector<int> muchii[200005];
int dist[5][200005];
void bfs(int start,int index)
{
for(int i=1;i<=n;i++)
dist[index][i]=1e9;
dist[index][start]=0;
queue<int> coada;
coada.push(start);
while(!coada.empty())
{
int nod=coada.front();
coada.pop();
for(int i:muchii[nod])
if(dist[index][i]>dist[index][nod]+1)
{
dist[index][i]=dist[index][nod]+1;
coada.push(i);
}
}
}
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(0);
cin>>n>>m>>s>>d>>a>>b;
for(int i=1;i<=m;i++)
{
int x,y;
cin>>x>>y;
muchii[x].push_back(y);
muchii[y].push_back(x);
}
bfs(a,1);
bfs(b,2);
bfs(d,3);
bfs(s,4);
int minim=1e9;
for(int i=1;i<=n;i++)
{
bool good;
if(dist[4][i]<=1)
good=1;
else
{
good=0;
if(dist[1][i]>=dist[1][s])
{
if(dist[2][i]+1>=dist[2][s])
good=1;
}
if(dist[2][i]>=dist[2][s])
{
if(dist[1][i]+1>=dist[1][s])
good=1;
}
if(dist[1][i]==dist[2][i]&&dist[1][s]==dist[2][s]&&dist[1][i]+1>=dist[1][s]&&dist[2][i]+1>=dist[2][s])
good=1;
}
if(!good)
minim=min(minim,dist[3][i]-2);
}
cout<<max(-1,minim);
return 0;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
4 ms |
4948 KB |
Output is correct |
| 2 |
Partially correct |
3 ms |
4948 KB |
Partially correct |
| 3 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 4 |
Incorrect |
3 ms |
4948 KB |
Output isn't correct |
| 5 |
Incorrect |
3 ms |
4948 KB |
Output isn't correct |
| 6 |
Correct |
2 ms |
4948 KB |
Output is correct |
| 7 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 8 |
Incorrect |
3 ms |
4948 KB |
Output isn't correct |
| 9 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 10 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 11 |
Correct |
2 ms |
4948 KB |
Output is correct |
| 12 |
Incorrect |
2 ms |
5076 KB |
Output isn't correct |
| 13 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 14 |
Incorrect |
3 ms |
4948 KB |
Output isn't correct |
| 15 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 16 |
Incorrect |
3 ms |
5076 KB |
Output isn't correct |
| 17 |
Incorrect |
3 ms |
5076 KB |
Output isn't correct |
| 18 |
Incorrect |
3 ms |
5076 KB |
Output isn't correct |
| 19 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 20 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 21 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 22 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 23 |
Correct |
3 ms |
5092 KB |
Output is correct |
| 24 |
Incorrect |
3 ms |
5076 KB |
Output isn't correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
21 ms |
6872 KB |
Output is correct |
| 2 |
Incorrect |
26 ms |
7748 KB |
Output isn't correct |
| 3 |
Correct |
20 ms |
6996 KB |
Output is correct |
| 4 |
Incorrect |
26 ms |
7892 KB |
Output isn't correct |
| 5 |
Correct |
21 ms |
6856 KB |
Output is correct |
| 6 |
Correct |
19 ms |
7084 KB |
Output is correct |
| 7 |
Correct |
23 ms |
7256 KB |
Output is correct |
| 8 |
Correct |
28 ms |
7288 KB |
Output is correct |
| 9 |
Incorrect |
35 ms |
7688 KB |
Output isn't correct |
| 10 |
Correct |
140 ms |
12084 KB |
Output is correct |
| 11 |
Incorrect |
43 ms |
9296 KB |
Output isn't correct |
| 12 |
Correct |
72 ms |
10300 KB |
Output is correct |
| 13 |
Incorrect |
68 ms |
9620 KB |
Output isn't correct |
| 14 |
Correct |
51 ms |
8888 KB |
Output is correct |
| 15 |
Correct |
66 ms |
10468 KB |
Output is correct |
| 16 |
Correct |
66 ms |
10700 KB |
Output is correct |
| 17 |
Correct |
57 ms |
10120 KB |
Output is correct |
| 18 |
Incorrect |
62 ms |
10104 KB |
Output isn't correct |
| 19 |
Correct |
91 ms |
11344 KB |
Output is correct |
| 20 |
Incorrect |
146 ms |
14148 KB |
Output isn't correct |
| 21 |
Incorrect |
89 ms |
12548 KB |
Output isn't correct |
| 22 |
Correct |
88 ms |
11508 KB |
Output is correct |
| 23 |
Partially correct |
100 ms |
12392 KB |
Partially correct |
| 24 |
Correct |
104 ms |
12376 KB |
Output is correct |
| 25 |
Incorrect |
80 ms |
12008 KB |
Output isn't correct |
| 26 |
Partially correct |
106 ms |
11724 KB |
Partially correct |
| 27 |
Correct |
115 ms |
12440 KB |
Output is correct |
| 28 |
Correct |
113 ms |
12568 KB |
Output is correct |
| 29 |
Correct |
108 ms |
12916 KB |
Output is correct |
| 30 |
Incorrect |
179 ms |
14972 KB |
Output isn't correct |
| 31 |
Incorrect |
150 ms |
13700 KB |
Output isn't correct |
| 32 |
Correct |
117 ms |
12468 KB |
Output is correct |
| 33 |
Partially correct |
95 ms |
12676 KB |
Partially correct |
| 34 |
Incorrect |
108 ms |
13112 KB |
Output isn't correct |
| 35 |
Incorrect |
100 ms |
12748 KB |
Output isn't correct |
| 36 |
Incorrect |
95 ms |
13072 KB |
Output isn't correct |
| 37 |
Correct |
124 ms |
14088 KB |
Output is correct |
| 38 |
Correct |
128 ms |
13940 KB |
Output is correct |
| 39 |
Correct |
157 ms |
13980 KB |
Output is correct |
| 40 |
Incorrect |
158 ms |
15488 KB |
Output isn't correct |
| 41 |
Correct |
234 ms |
17684 KB |
Output is correct |
