#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define fi first
#define se second
const int BLOCK=226;
int m,n,s,t,u,vv;
int dp[50005];
bool check[50005][BLOCK+5];
vector<int> g[50005];
struct jakarta
{
int v,p,w;
jakarta(int v,int p,int w): v(v),p(p),w(w) {}
};
queue<jakarta> Q;
signed main()
{
ios_base::sync_with_stdio(0);
cin.tie(0);cout.tie(0);
cin>>n>>m;
for (int i=0;i<m;++i)
{
cin>>u>>vv;
g[u].push_back(vv);
if (i==0)
{
s=u;
}
if (i==1)
{
t=u;
}
}
memset(dp,-1,sizeof dp);
Q.emplace(s,0,0);
while (Q.size())
{
jakarta hao=Q.front();
Q.pop();
if (hao.v<0 || hao.v>=n) continue;
if (abs(hao.p)<BLOCK)
{
if (check[hao.v][abs(hao.p)]) continue;
check[hao.v][abs(hao.p)]=1;
}
if (dp[hao.v]==-1)
{
dp[hao.v]=hao.w;
for (auto it: g[hao.v])
{
Q.emplace(hao.v+it,it,hao.w+1);
Q.emplace(hao.v-it,-it,hao.w+1);
}
}
Q.emplace(hao.v+hao.p,hao.p,hao.w+1);
}
cout<<dp[t];
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
4688 KB |
Output is correct |
2 |
Correct |
1 ms |
4688 KB |
Output is correct |
3 |
Correct |
2 ms |
4688 KB |
Output is correct |
4 |
Correct |
2 ms |
4688 KB |
Output is correct |
5 |
Correct |
2 ms |
4688 KB |
Output is correct |
6 |
Correct |
2 ms |
4688 KB |
Output is correct |
7 |
Correct |
2 ms |
4688 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
4688 KB |
Output is correct |
2 |
Correct |
2 ms |
4688 KB |
Output is correct |
3 |
Correct |
2 ms |
4688 KB |
Output is correct |
4 |
Correct |
2 ms |
4688 KB |
Output is correct |
5 |
Correct |
2 ms |
4688 KB |
Output is correct |
6 |
Correct |
1 ms |
4688 KB |
Output is correct |
7 |
Correct |
1 ms |
4688 KB |
Output is correct |
8 |
Correct |
2 ms |
4688 KB |
Output is correct |
9 |
Correct |
2 ms |
4688 KB |
Output is correct |
10 |
Correct |
2 ms |
4856 KB |
Output is correct |
11 |
Correct |
2 ms |
4944 KB |
Output is correct |
12 |
Correct |
2 ms |
5112 KB |
Output is correct |
13 |
Correct |
2 ms |
4944 KB |
Output is correct |
14 |
Correct |
3 ms |
4944 KB |
Output is correct |
15 |
Correct |
2 ms |
4944 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
4688 KB |
Output is correct |
2 |
Correct |
2 ms |
4688 KB |
Output is correct |
3 |
Correct |
1 ms |
4688 KB |
Output is correct |
4 |
Correct |
2 ms |
4688 KB |
Output is correct |
5 |
Correct |
2 ms |
4688 KB |
Output is correct |
6 |
Correct |
2 ms |
4700 KB |
Output is correct |
7 |
Correct |
2 ms |
4688 KB |
Output is correct |
8 |
Correct |
2 ms |
4688 KB |
Output is correct |
9 |
Correct |
1 ms |
4688 KB |
Output is correct |
10 |
Correct |
2 ms |
5112 KB |
Output is correct |
11 |
Correct |
2 ms |
4944 KB |
Output is correct |
12 |
Correct |
2 ms |
4944 KB |
Output is correct |
13 |
Correct |
2 ms |
4944 KB |
Output is correct |
14 |
Correct |
2 ms |
4944 KB |
Output is correct |
15 |
Correct |
2 ms |
4944 KB |
Output is correct |
16 |
Correct |
2 ms |
4688 KB |
Output is correct |
17 |
Correct |
2 ms |
4944 KB |
Output is correct |
18 |
Correct |
1 ms |
4944 KB |
Output is correct |
19 |
Correct |
2 ms |
4944 KB |
Output is correct |
20 |
Correct |
2 ms |
4944 KB |
Output is correct |
21 |
Correct |
2 ms |
4688 KB |
Output is correct |
22 |
Correct |
2 ms |
4944 KB |
Output is correct |
23 |
Correct |
2 ms |
4944 KB |
Output is correct |
24 |
Correct |
2 ms |
4944 KB |
Output is correct |
25 |
Correct |
2 ms |
4944 KB |
Output is correct |
26 |
Correct |
2 ms |
4944 KB |
Output is correct |
27 |
Correct |
2 ms |
4944 KB |
Output is correct |
28 |
Correct |
2 ms |
4944 KB |
Output is correct |
29 |
Correct |
2 ms |
4944 KB |
Output is correct |
30 |
Correct |
2 ms |
4688 KB |
Output is correct |
31 |
Correct |
2 ms |
4688 KB |
Output is correct |
32 |
Correct |
2 ms |
4688 KB |
Output is correct |
33 |
Correct |
2 ms |
4944 KB |
Output is correct |
34 |
Correct |
3 ms |
4944 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
4688 KB |
Output is correct |
2 |
Correct |
1 ms |
4688 KB |
Output is correct |
3 |
Correct |
2 ms |
4688 KB |
Output is correct |
4 |
Correct |
1 ms |
4688 KB |
Output is correct |
5 |
Correct |
2 ms |
4688 KB |
Output is correct |
6 |
Correct |
2 ms |
4688 KB |
Output is correct |
7 |
Correct |
1 ms |
4688 KB |
Output is correct |
8 |
Correct |
1 ms |
4856 KB |
Output is correct |
9 |
Correct |
1 ms |
4688 KB |
Output is correct |
10 |
Correct |
1 ms |
4688 KB |
Output is correct |
11 |
Correct |
2 ms |
4944 KB |
Output is correct |
12 |
Correct |
2 ms |
4944 KB |
Output is correct |
13 |
Correct |
1 ms |
4944 KB |
Output is correct |
14 |
Correct |
2 ms |
4944 KB |
Output is correct |
15 |
Correct |
2 ms |
4944 KB |
Output is correct |
16 |
Correct |
2 ms |
4688 KB |
Output is correct |
17 |
Correct |
2 ms |
4944 KB |
Output is correct |
18 |
Correct |
2 ms |
4944 KB |
Output is correct |
19 |
Correct |
1 ms |
4944 KB |
Output is correct |
20 |
Correct |
2 ms |
4944 KB |
Output is correct |
21 |
Correct |
2 ms |
4688 KB |
Output is correct |
22 |
Correct |
2 ms |
4944 KB |
Output is correct |
23 |
Correct |
2 ms |
4944 KB |
Output is correct |
24 |
Correct |
2 ms |
5200 KB |
Output is correct |
25 |
Correct |
2 ms |
5112 KB |
Output is correct |
26 |
Correct |
2 ms |
4944 KB |
Output is correct |
27 |
Correct |
2 ms |
4944 KB |
Output is correct |
28 |
Correct |
2 ms |
4944 KB |
Output is correct |
29 |
Correct |
2 ms |
4944 KB |
Output is correct |
30 |
Correct |
3 ms |
4688 KB |
Output is correct |
31 |
Correct |
2 ms |
4688 KB |
Output is correct |
32 |
Correct |
2 ms |
4688 KB |
Output is correct |
33 |
Correct |
2 ms |
4944 KB |
Output is correct |
34 |
Correct |
2 ms |
4944 KB |
Output is correct |
35 |
Correct |
6 ms |
5456 KB |
Output is correct |
36 |
Correct |
2 ms |
4944 KB |
Output is correct |
37 |
Correct |
7 ms |
5456 KB |
Output is correct |
38 |
Correct |
7 ms |
5688 KB |
Output is correct |
39 |
Correct |
9 ms |
5712 KB |
Output is correct |
40 |
Correct |
8 ms |
5712 KB |
Output is correct |
41 |
Correct |
9 ms |
5712 KB |
Output is correct |
42 |
Correct |
7 ms |
5712 KB |
Output is correct |
43 |
Correct |
6 ms |
5712 KB |
Output is correct |
44 |
Correct |
6 ms |
5712 KB |
Output is correct |
45 |
Correct |
10 ms |
5712 KB |
Output is correct |
46 |
Correct |
9 ms |
5860 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
4688 KB |
Output is correct |
2 |
Correct |
2 ms |
4688 KB |
Output is correct |
3 |
Correct |
2 ms |
4860 KB |
Output is correct |
4 |
Correct |
2 ms |
4688 KB |
Output is correct |
5 |
Correct |
2 ms |
4688 KB |
Output is correct |
6 |
Correct |
2 ms |
4688 KB |
Output is correct |
7 |
Correct |
2 ms |
4688 KB |
Output is correct |
8 |
Correct |
1 ms |
4688 KB |
Output is correct |
9 |
Correct |
2 ms |
4688 KB |
Output is correct |
10 |
Correct |
2 ms |
4708 KB |
Output is correct |
11 |
Correct |
3 ms |
4944 KB |
Output is correct |
12 |
Correct |
2 ms |
4944 KB |
Output is correct |
13 |
Correct |
2 ms |
4944 KB |
Output is correct |
14 |
Correct |
2 ms |
4944 KB |
Output is correct |
15 |
Correct |
2 ms |
4944 KB |
Output is correct |
16 |
Correct |
2 ms |
4688 KB |
Output is correct |
17 |
Correct |
2 ms |
4944 KB |
Output is correct |
18 |
Correct |
2 ms |
4944 KB |
Output is correct |
19 |
Correct |
2 ms |
4944 KB |
Output is correct |
20 |
Correct |
1 ms |
4944 KB |
Output is correct |
21 |
Correct |
2 ms |
4688 KB |
Output is correct |
22 |
Correct |
2 ms |
4944 KB |
Output is correct |
23 |
Correct |
2 ms |
4944 KB |
Output is correct |
24 |
Correct |
2 ms |
4944 KB |
Output is correct |
25 |
Correct |
2 ms |
4944 KB |
Output is correct |
26 |
Correct |
2 ms |
4944 KB |
Output is correct |
27 |
Correct |
2 ms |
4948 KB |
Output is correct |
28 |
Correct |
2 ms |
4944 KB |
Output is correct |
29 |
Correct |
2 ms |
4944 KB |
Output is correct |
30 |
Correct |
2 ms |
4856 KB |
Output is correct |
31 |
Correct |
2 ms |
4856 KB |
Output is correct |
32 |
Correct |
2 ms |
4688 KB |
Output is correct |
33 |
Correct |
3 ms |
4944 KB |
Output is correct |
34 |
Correct |
3 ms |
4944 KB |
Output is correct |
35 |
Correct |
7 ms |
5468 KB |
Output is correct |
36 |
Correct |
3 ms |
4944 KB |
Output is correct |
37 |
Correct |
7 ms |
5456 KB |
Output is correct |
38 |
Correct |
8 ms |
5712 KB |
Output is correct |
39 |
Correct |
10 ms |
5712 KB |
Output is correct |
40 |
Correct |
8 ms |
5712 KB |
Output is correct |
41 |
Correct |
8 ms |
5712 KB |
Output is correct |
42 |
Correct |
5 ms |
5712 KB |
Output is correct |
43 |
Correct |
6 ms |
5880 KB |
Output is correct |
44 |
Correct |
5 ms |
5712 KB |
Output is correct |
45 |
Correct |
10 ms |
5712 KB |
Output is correct |
46 |
Correct |
10 ms |
5712 KB |
Output is correct |
47 |
Correct |
14 ms |
7504 KB |
Output is correct |
48 |
Correct |
5 ms |
5200 KB |
Output is correct |
49 |
Correct |
5 ms |
5200 KB |
Output is correct |
50 |
Correct |
4 ms |
5428 KB |
Output is correct |
51 |
Correct |
17 ms |
11316 KB |
Output is correct |
52 |
Correct |
24 ms |
11336 KB |
Output is correct |
53 |
Correct |
13 ms |
11088 KB |
Output is correct |
54 |
Correct |
6 ms |
10828 KB |
Output is correct |
55 |
Correct |
6 ms |
10528 KB |
Output is correct |
56 |
Correct |
11 ms |
11500 KB |
Output is correct |
57 |
Correct |
14 ms |
10604 KB |
Output is correct |
58 |
Correct |
9 ms |
11344 KB |
Output is correct |
59 |
Correct |
11 ms |
11344 KB |
Output is correct |
60 |
Correct |
11 ms |
11344 KB |
Output is correct |
61 |
Correct |
10 ms |
11344 KB |
Output is correct |
62 |
Correct |
22 ms |
11600 KB |
Output is correct |
63 |
Correct |
33 ms |
11100 KB |
Output is correct |
64 |
Correct |
35 ms |
11088 KB |
Output is correct |
65 |
Correct |
59 ms |
11116 KB |
Output is correct |
66 |
Correct |
100 ms |
11484 KB |
Output is correct |
67 |
Correct |
105 ms |
11336 KB |
Output is correct |