#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
#define forinc(i,a,b) for(int i=a;i<=b;++i)
#define fordec(i,a,b) for(int i=a;i>=b;--i)
#define forv(a,b) for(auto &a:b)
#define pb push_back
#define pii pair<int,int>
#define fi first
#define se second
#define all(a) a.begin(),a.end()
#define reset(f,x) memset(f,x,sizeof(f))
#define bit(x,i) ((x>>(i-1))&1)
#define onbit(x,i) (x|(1<<(i-1)))
#define offbit(x,i) (x&~(1<<(i-1)))
#define read2(a,b) read(a),read(b)
#define read3(a,b,c) read(a),read(b),read(c)
const int N=30100;
int n,m,a[N],v[N];
vector<int> ke[N];
unordered_map<int,int> f[N];
queue<pii> q;
void Push(int i,int p,int c)
{
if(i-p>=0&&!f[i-p][p]) f[i-p][p]=c+1,q.push({i-p,p});
if(i+p<=n&&!f[i+p][p]) f[i+p][p]=c+1,q.push({i+p,p});
}
void BFS()
{
int s=v[1];
forv(u,ke[s]) if(!f[s][u]) f[s][u]=1,q.push({s,u});
while(!q.empty())
{
pii u=q.front();q.pop();
int c=f[u.fi][u.se];
if(u.fi==v[2]) {cout<<c-1;exit(0);}
Push(u.fi,u.se,c);
forv(v,ke[u.fi]) Push(u.fi,v,c);
}
cout<<-1;
}
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
//freopen("JAKARTA.inp","r",stdin);
cin>>n>>m;
forinc(i,1,m)
{
int p;
cin>>v[i]>>p;
ke[v[i]].pb(p);
}
BFS();
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
4 ms |
2688 KB |
Output is correct |
2 |
Correct |
5 ms |
2688 KB |
Output is correct |
3 |
Correct |
5 ms |
2688 KB |
Output is correct |
4 |
Correct |
4 ms |
2688 KB |
Output is correct |
5 |
Correct |
5 ms |
2688 KB |
Output is correct |
6 |
Correct |
5 ms |
2688 KB |
Output is correct |
7 |
Correct |
5 ms |
2688 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
4 ms |
2688 KB |
Output is correct |
2 |
Correct |
6 ms |
2688 KB |
Output is correct |
3 |
Correct |
4 ms |
2688 KB |
Output is correct |
4 |
Correct |
4 ms |
2688 KB |
Output is correct |
5 |
Correct |
5 ms |
2688 KB |
Output is correct |
6 |
Correct |
4 ms |
2688 KB |
Output is correct |
7 |
Correct |
5 ms |
2688 KB |
Output is correct |
8 |
Correct |
5 ms |
2688 KB |
Output is correct |
9 |
Correct |
5 ms |
2688 KB |
Output is correct |
10 |
Correct |
5 ms |
2688 KB |
Output is correct |
11 |
Correct |
7 ms |
2816 KB |
Output is correct |
12 |
Correct |
5 ms |
2688 KB |
Output is correct |
13 |
Correct |
4 ms |
2688 KB |
Output is correct |
14 |
Correct |
7 ms |
2944 KB |
Output is correct |
15 |
Correct |
5 ms |
2816 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
5 ms |
2688 KB |
Output is correct |
2 |
Correct |
4 ms |
2736 KB |
Output is correct |
3 |
Correct |
5 ms |
2688 KB |
Output is correct |
4 |
Correct |
5 ms |
2688 KB |
Output is correct |
5 |
Correct |
4 ms |
2688 KB |
Output is correct |
6 |
Correct |
4 ms |
2588 KB |
Output is correct |
7 |
Correct |
5 ms |
2688 KB |
Output is correct |
8 |
Correct |
5 ms |
2688 KB |
Output is correct |
9 |
Correct |
5 ms |
2688 KB |
Output is correct |
10 |
Correct |
5 ms |
2688 KB |
Output is correct |
11 |
Correct |
7 ms |
2816 KB |
Output is correct |
12 |
Correct |
5 ms |
2688 KB |
Output is correct |
13 |
Correct |
6 ms |
2688 KB |
Output is correct |
14 |
Correct |
8 ms |
2944 KB |
Output is correct |
15 |
Correct |
6 ms |
2816 KB |
Output is correct |
16 |
Correct |
5 ms |
2688 KB |
Output is correct |
17 |
Correct |
9 ms |
2944 KB |
Output is correct |
18 |
Correct |
7 ms |
2688 KB |
Output is correct |
19 |
Correct |
5 ms |
2688 KB |
Output is correct |
20 |
Correct |
6 ms |
2944 KB |
Output is correct |
21 |
Correct |
4 ms |
2688 KB |
Output is correct |
22 |
Correct |
5 ms |
2688 KB |
Output is correct |
23 |
Correct |
7 ms |
2944 KB |
Output is correct |
24 |
Correct |
9 ms |
3072 KB |
Output is correct |
25 |
Correct |
5 ms |
2816 KB |
Output is correct |
26 |
Correct |
6 ms |
2944 KB |
Output is correct |
27 |
Correct |
7 ms |
2944 KB |
Output is correct |
28 |
Correct |
12 ms |
3584 KB |
Output is correct |
29 |
Correct |
26 ms |
5220 KB |
Output is correct |
30 |
Correct |
10 ms |
3584 KB |
Output is correct |
31 |
Correct |
17 ms |
4224 KB |
Output is correct |
32 |
Correct |
11 ms |
3712 KB |
Output is correct |
33 |
Correct |
52 ms |
7772 KB |
Output is correct |
34 |
Correct |
30 ms |
5632 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
5 ms |
2688 KB |
Output is correct |
2 |
Correct |
4 ms |
2688 KB |
Output is correct |
3 |
Correct |
5 ms |
2688 KB |
Output is correct |
4 |
Correct |
4 ms |
2688 KB |
Output is correct |
5 |
Correct |
4 ms |
2688 KB |
Output is correct |
6 |
Correct |
4 ms |
2688 KB |
Output is correct |
7 |
Correct |
5 ms |
2660 KB |
Output is correct |
8 |
Correct |
4 ms |
2688 KB |
Output is correct |
9 |
Correct |
5 ms |
2816 KB |
Output is correct |
10 |
Correct |
5 ms |
2816 KB |
Output is correct |
11 |
Correct |
6 ms |
2816 KB |
Output is correct |
12 |
Correct |
7 ms |
2688 KB |
Output is correct |
13 |
Correct |
5 ms |
2816 KB |
Output is correct |
14 |
Correct |
11 ms |
2944 KB |
Output is correct |
15 |
Correct |
5 ms |
2816 KB |
Output is correct |
16 |
Correct |
4 ms |
2688 KB |
Output is correct |
17 |
Correct |
5 ms |
2944 KB |
Output is correct |
18 |
Correct |
6 ms |
2724 KB |
Output is correct |
19 |
Correct |
4 ms |
2688 KB |
Output is correct |
20 |
Correct |
7 ms |
2944 KB |
Output is correct |
21 |
Correct |
4 ms |
2688 KB |
Output is correct |
22 |
Correct |
4 ms |
2688 KB |
Output is correct |
23 |
Correct |
6 ms |
2944 KB |
Output is correct |
24 |
Correct |
8 ms |
3072 KB |
Output is correct |
25 |
Correct |
5 ms |
2816 KB |
Output is correct |
26 |
Correct |
5 ms |
2944 KB |
Output is correct |
27 |
Correct |
6 ms |
2944 KB |
Output is correct |
28 |
Correct |
17 ms |
3704 KB |
Output is correct |
29 |
Correct |
24 ms |
5248 KB |
Output is correct |
30 |
Correct |
12 ms |
3584 KB |
Output is correct |
31 |
Correct |
16 ms |
4224 KB |
Output is correct |
32 |
Correct |
12 ms |
3712 KB |
Output is correct |
33 |
Correct |
52 ms |
7800 KB |
Output is correct |
34 |
Correct |
39 ms |
5624 KB |
Output is correct |
35 |
Correct |
29 ms |
4344 KB |
Output is correct |
36 |
Correct |
6 ms |
2816 KB |
Output is correct |
37 |
Correct |
16 ms |
3968 KB |
Output is correct |
38 |
Correct |
23 ms |
4480 KB |
Output is correct |
39 |
Correct |
15 ms |
3072 KB |
Output is correct |
40 |
Correct |
11 ms |
3072 KB |
Output is correct |
41 |
Correct |
12 ms |
3300 KB |
Output is correct |
42 |
Correct |
12 ms |
3072 KB |
Output is correct |
43 |
Correct |
9 ms |
3200 KB |
Output is correct |
44 |
Correct |
10 ms |
3200 KB |
Output is correct |
45 |
Correct |
576 ms |
23640 KB |
Output is correct |
46 |
Correct |
416 ms |
15052 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
5 ms |
2688 KB |
Output is correct |
2 |
Correct |
5 ms |
2688 KB |
Output is correct |
3 |
Correct |
5 ms |
2688 KB |
Output is correct |
4 |
Correct |
5 ms |
2688 KB |
Output is correct |
5 |
Correct |
4 ms |
2688 KB |
Output is correct |
6 |
Correct |
4 ms |
2688 KB |
Output is correct |
7 |
Correct |
4 ms |
2688 KB |
Output is correct |
8 |
Correct |
5 ms |
2688 KB |
Output is correct |
9 |
Correct |
4 ms |
2688 KB |
Output is correct |
10 |
Correct |
4 ms |
2688 KB |
Output is correct |
11 |
Correct |
4 ms |
2688 KB |
Output is correct |
12 |
Correct |
6 ms |
2688 KB |
Output is correct |
13 |
Correct |
5 ms |
2688 KB |
Output is correct |
14 |
Correct |
9 ms |
2944 KB |
Output is correct |
15 |
Correct |
6 ms |
2816 KB |
Output is correct |
16 |
Correct |
4 ms |
2688 KB |
Output is correct |
17 |
Correct |
6 ms |
2944 KB |
Output is correct |
18 |
Correct |
4 ms |
2688 KB |
Output is correct |
19 |
Correct |
4 ms |
2736 KB |
Output is correct |
20 |
Correct |
5 ms |
2816 KB |
Output is correct |
21 |
Correct |
4 ms |
2736 KB |
Output is correct |
22 |
Correct |
4 ms |
2688 KB |
Output is correct |
23 |
Correct |
6 ms |
2944 KB |
Output is correct |
24 |
Correct |
6 ms |
2988 KB |
Output is correct |
25 |
Correct |
7 ms |
2816 KB |
Output is correct |
26 |
Correct |
7 ms |
2944 KB |
Output is correct |
27 |
Correct |
6 ms |
2944 KB |
Output is correct |
28 |
Correct |
14 ms |
3712 KB |
Output is correct |
29 |
Correct |
26 ms |
5248 KB |
Output is correct |
30 |
Correct |
10 ms |
3456 KB |
Output is correct |
31 |
Correct |
19 ms |
4420 KB |
Output is correct |
32 |
Correct |
15 ms |
3804 KB |
Output is correct |
33 |
Correct |
40 ms |
7804 KB |
Output is correct |
34 |
Correct |
28 ms |
5624 KB |
Output is correct |
35 |
Correct |
26 ms |
4352 KB |
Output is correct |
36 |
Correct |
5 ms |
2816 KB |
Output is correct |
37 |
Correct |
15 ms |
3968 KB |
Output is correct |
38 |
Correct |
26 ms |
4480 KB |
Output is correct |
39 |
Correct |
14 ms |
3072 KB |
Output is correct |
40 |
Correct |
11 ms |
3148 KB |
Output is correct |
41 |
Correct |
13 ms |
3328 KB |
Output is correct |
42 |
Correct |
11 ms |
3152 KB |
Output is correct |
43 |
Correct |
11 ms |
3200 KB |
Output is correct |
44 |
Correct |
16 ms |
3200 KB |
Output is correct |
45 |
Correct |
703 ms |
23612 KB |
Output is correct |
46 |
Correct |
437 ms |
15096 KB |
Output is correct |
47 |
Correct |
27 ms |
4096 KB |
Output is correct |
48 |
Correct |
17 ms |
3200 KB |
Output is correct |
49 |
Correct |
18 ms |
3200 KB |
Output is correct |
50 |
Correct |
11 ms |
3072 KB |
Output is correct |
51 |
Correct |
47 ms |
5752 KB |
Output is correct |
52 |
Correct |
64 ms |
6404 KB |
Output is correct |
53 |
Correct |
18 ms |
3712 KB |
Output is correct |
54 |
Correct |
9 ms |
3684 KB |
Output is correct |
55 |
Correct |
11 ms |
4124 KB |
Output is correct |
56 |
Correct |
31 ms |
5632 KB |
Output is correct |
57 |
Correct |
5 ms |
2816 KB |
Output is correct |
58 |
Correct |
50 ms |
6264 KB |
Output is correct |
59 |
Correct |
32 ms |
5880 KB |
Output is correct |
60 |
Correct |
37 ms |
5880 KB |
Output is correct |
61 |
Correct |
36 ms |
5616 KB |
Output is correct |
62 |
Correct |
584 ms |
23012 KB |
Output is correct |
63 |
Execution timed out |
1070 ms |
51060 KB |
Time limit exceeded |
64 |
Halted |
0 ms |
0 KB |
- |