#include<stdio.h>
#include<algorithm>
#include<vector>
#include<queue>
using namespace std;
const int MAX_N = 30000, RTN = 200;
int n, m, dist[MAX_N], s, e;
bool ck[MAX_N][RTN], fvis[MAX_N];
struct st{
int b, p, w;
st(int _b, int _p, int _w)
:b(_b), p(_p), w(_w){}
};
vector<int> adj[MAX_N];
queue<st> q;
int main(){
scanf("%d %d", &n, &m);
for (int i = 0; i < m; i++){
int a, b;
scanf("%d %d", &a, &b);
adj[a].push_back(b);
if (i == 0) s = a;
if (i == 1) e = a;
}
dist[e] = -1;
q.push(st(s, 0, 0));
while (!q.empty()){
st h = q.front();
q.pop();
if (h.b < 0 || h.b >= n) continue;
if (abs(h.p) < RTN){
if (ck[h.b][abs(h.p)]) continue;
ck[h.b][abs(h.p)] = true;
}
if (!fvis[h.b]){
fvis[h.b] = true;
dist[h.b] = h.w;
for (auto t : adj[h.b]){
q.push(st(h.b + t, t, h.w + 1));
q.push(st(h.b - t, -t, h.w + 1));
}
}
q.push(st(h.b + h.p, h.p, h.w + 1));
}
printf("%d", dist[e]);
return 0;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
8288 KB |
Output is correct |
2 |
Correct |
0 ms |
8288 KB |
Output is correct |
3 |
Correct |
0 ms |
8288 KB |
Output is correct |
4 |
Correct |
0 ms |
8288 KB |
Output is correct |
5 |
Correct |
0 ms |
8288 KB |
Output is correct |
6 |
Correct |
0 ms |
8288 KB |
Output is correct |
7 |
Correct |
0 ms |
8288 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
8288 KB |
Output is correct |
2 |
Correct |
0 ms |
8288 KB |
Output is correct |
3 |
Correct |
0 ms |
8288 KB |
Output is correct |
4 |
Correct |
0 ms |
8288 KB |
Output is correct |
5 |
Correct |
0 ms |
8288 KB |
Output is correct |
6 |
Correct |
0 ms |
8288 KB |
Output is correct |
7 |
Correct |
0 ms |
8288 KB |
Output is correct |
8 |
Correct |
0 ms |
8288 KB |
Output is correct |
9 |
Correct |
0 ms |
8288 KB |
Output is correct |
10 |
Correct |
0 ms |
8288 KB |
Output is correct |
11 |
Correct |
0 ms |
8288 KB |
Output is correct |
12 |
Correct |
0 ms |
8288 KB |
Output is correct |
13 |
Correct |
0 ms |
8288 KB |
Output is correct |
14 |
Correct |
0 ms |
8288 KB |
Output is correct |
15 |
Correct |
0 ms |
8288 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
8288 KB |
Output is correct |
2 |
Correct |
0 ms |
8288 KB |
Output is correct |
3 |
Correct |
0 ms |
8288 KB |
Output is correct |
4 |
Correct |
0 ms |
8288 KB |
Output is correct |
5 |
Correct |
0 ms |
8288 KB |
Output is correct |
6 |
Correct |
0 ms |
8288 KB |
Output is correct |
7 |
Correct |
0 ms |
8288 KB |
Output is correct |
8 |
Correct |
0 ms |
8288 KB |
Output is correct |
9 |
Correct |
0 ms |
8288 KB |
Output is correct |
10 |
Correct |
0 ms |
8288 KB |
Output is correct |
11 |
Correct |
0 ms |
8288 KB |
Output is correct |
12 |
Correct |
0 ms |
8288 KB |
Output is correct |
13 |
Correct |
1 ms |
8288 KB |
Output is correct |
14 |
Correct |
0 ms |
8288 KB |
Output is correct |
15 |
Correct |
0 ms |
8288 KB |
Output is correct |
16 |
Correct |
0 ms |
8288 KB |
Output is correct |
17 |
Correct |
0 ms |
8288 KB |
Output is correct |
18 |
Correct |
0 ms |
8288 KB |
Output is correct |
19 |
Correct |
0 ms |
8288 KB |
Output is correct |
20 |
Correct |
0 ms |
8288 KB |
Output is correct |
21 |
Correct |
0 ms |
8288 KB |
Output is correct |
22 |
Correct |
0 ms |
8288 KB |
Output is correct |
23 |
Correct |
0 ms |
8288 KB |
Output is correct |
24 |
Correct |
0 ms |
8288 KB |
Output is correct |
25 |
Correct |
0 ms |
8288 KB |
Output is correct |
26 |
Correct |
0 ms |
8288 KB |
Output is correct |
27 |
Correct |
0 ms |
8288 KB |
Output is correct |
28 |
Correct |
0 ms |
8288 KB |
Output is correct |
29 |
Correct |
0 ms |
8288 KB |
Output is correct |
30 |
Correct |
0 ms |
8288 KB |
Output is correct |
31 |
Correct |
2 ms |
8288 KB |
Output is correct |
32 |
Correct |
0 ms |
8288 KB |
Output is correct |
33 |
Correct |
0 ms |
8288 KB |
Output is correct |
34 |
Correct |
0 ms |
8288 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
8288 KB |
Output is correct |
2 |
Correct |
1 ms |
8288 KB |
Output is correct |
3 |
Correct |
0 ms |
8288 KB |
Output is correct |
4 |
Correct |
0 ms |
8288 KB |
Output is correct |
5 |
Correct |
0 ms |
8288 KB |
Output is correct |
6 |
Correct |
0 ms |
8288 KB |
Output is correct |
7 |
Correct |
0 ms |
8288 KB |
Output is correct |
8 |
Correct |
0 ms |
8288 KB |
Output is correct |
9 |
Correct |
0 ms |
8288 KB |
Output is correct |
10 |
Correct |
0 ms |
8288 KB |
Output is correct |
11 |
Correct |
1 ms |
8288 KB |
Output is correct |
12 |
Correct |
0 ms |
8288 KB |
Output is correct |
13 |
Correct |
1 ms |
8288 KB |
Output is correct |
14 |
Correct |
0 ms |
8288 KB |
Output is correct |
15 |
Correct |
0 ms |
8288 KB |
Output is correct |
16 |
Correct |
0 ms |
8288 KB |
Output is correct |
17 |
Correct |
0 ms |
8288 KB |
Output is correct |
18 |
Correct |
1 ms |
8288 KB |
Output is correct |
19 |
Correct |
0 ms |
8288 KB |
Output is correct |
20 |
Correct |
0 ms |
8288 KB |
Output is correct |
21 |
Correct |
0 ms |
8288 KB |
Output is correct |
22 |
Correct |
0 ms |
8288 KB |
Output is correct |
23 |
Correct |
0 ms |
8288 KB |
Output is correct |
24 |
Correct |
0 ms |
8288 KB |
Output is correct |
25 |
Correct |
2 ms |
8288 KB |
Output is correct |
26 |
Correct |
2 ms |
8288 KB |
Output is correct |
27 |
Correct |
0 ms |
8288 KB |
Output is correct |
28 |
Correct |
3 ms |
8288 KB |
Output is correct |
29 |
Correct |
0 ms |
8288 KB |
Output is correct |
30 |
Correct |
1 ms |
8288 KB |
Output is correct |
31 |
Correct |
0 ms |
8288 KB |
Output is correct |
32 |
Correct |
0 ms |
8288 KB |
Output is correct |
33 |
Correct |
3 ms |
8288 KB |
Output is correct |
34 |
Correct |
4 ms |
8288 KB |
Output is correct |
35 |
Correct |
6 ms |
8944 KB |
Output is correct |
36 |
Correct |
3 ms |
8288 KB |
Output is correct |
37 |
Correct |
11 ms |
8816 KB |
Output is correct |
38 |
Correct |
11 ms |
9084 KB |
Output is correct |
39 |
Correct |
8 ms |
9084 KB |
Output is correct |
40 |
Correct |
0 ms |
9084 KB |
Output is correct |
41 |
Correct |
5 ms |
9084 KB |
Output is correct |
42 |
Correct |
10 ms |
9076 KB |
Output is correct |
43 |
Correct |
7 ms |
9076 KB |
Output is correct |
44 |
Correct |
8 ms |
9080 KB |
Output is correct |
45 |
Correct |
18 ms |
9080 KB |
Output is correct |
46 |
Correct |
15 ms |
9080 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
8288 KB |
Output is correct |
2 |
Correct |
0 ms |
8288 KB |
Output is correct |
3 |
Correct |
1 ms |
8288 KB |
Output is correct |
4 |
Correct |
0 ms |
8288 KB |
Output is correct |
5 |
Correct |
0 ms |
8288 KB |
Output is correct |
6 |
Correct |
0 ms |
8288 KB |
Output is correct |
7 |
Correct |
0 ms |
8288 KB |
Output is correct |
8 |
Correct |
0 ms |
8288 KB |
Output is correct |
9 |
Correct |
0 ms |
8288 KB |
Output is correct |
10 |
Correct |
1 ms |
8288 KB |
Output is correct |
11 |
Correct |
1 ms |
8288 KB |
Output is correct |
12 |
Correct |
1 ms |
8288 KB |
Output is correct |
13 |
Correct |
0 ms |
8288 KB |
Output is correct |
14 |
Correct |
0 ms |
8288 KB |
Output is correct |
15 |
Correct |
0 ms |
8288 KB |
Output is correct |
16 |
Correct |
0 ms |
8288 KB |
Output is correct |
17 |
Correct |
0 ms |
8288 KB |
Output is correct |
18 |
Correct |
0 ms |
8288 KB |
Output is correct |
19 |
Correct |
0 ms |
8288 KB |
Output is correct |
20 |
Correct |
0 ms |
8288 KB |
Output is correct |
21 |
Correct |
0 ms |
8288 KB |
Output is correct |
22 |
Correct |
0 ms |
8288 KB |
Output is correct |
23 |
Correct |
0 ms |
8288 KB |
Output is correct |
24 |
Correct |
0 ms |
8288 KB |
Output is correct |
25 |
Correct |
0 ms |
8288 KB |
Output is correct |
26 |
Correct |
0 ms |
8288 KB |
Output is correct |
27 |
Correct |
0 ms |
8288 KB |
Output is correct |
28 |
Correct |
0 ms |
8288 KB |
Output is correct |
29 |
Correct |
0 ms |
8288 KB |
Output is correct |
30 |
Correct |
0 ms |
8288 KB |
Output is correct |
31 |
Correct |
0 ms |
8288 KB |
Output is correct |
32 |
Correct |
0 ms |
8288 KB |
Output is correct |
33 |
Correct |
4 ms |
8288 KB |
Output is correct |
34 |
Correct |
4 ms |
8288 KB |
Output is correct |
35 |
Correct |
6 ms |
8944 KB |
Output is correct |
36 |
Correct |
0 ms |
8288 KB |
Output is correct |
37 |
Correct |
0 ms |
8816 KB |
Output is correct |
38 |
Correct |
12 ms |
9084 KB |
Output is correct |
39 |
Correct |
16 ms |
9084 KB |
Output is correct |
40 |
Correct |
17 ms |
9084 KB |
Output is correct |
41 |
Correct |
9 ms |
9084 KB |
Output is correct |
42 |
Correct |
10 ms |
9076 KB |
Output is correct |
43 |
Correct |
0 ms |
9076 KB |
Output is correct |
44 |
Correct |
4 ms |
9080 KB |
Output is correct |
45 |
Correct |
20 ms |
9080 KB |
Output is correct |
46 |
Correct |
12 ms |
9080 KB |
Output is correct |
47 |
Correct |
29 ms |
9080 KB |
Output is correct |
48 |
Correct |
8 ms |
8684 KB |
Output is correct |
49 |
Correct |
8 ms |
8684 KB |
Output is correct |
50 |
Correct |
0 ms |
8552 KB |
Output is correct |
51 |
Correct |
18 ms |
8948 KB |
Output is correct |
52 |
Correct |
29 ms |
8948 KB |
Output is correct |
53 |
Correct |
21 ms |
8816 KB |
Output is correct |
54 |
Correct |
3 ms |
8288 KB |
Output is correct |
55 |
Correct |
4 ms |
8288 KB |
Output is correct |
56 |
Correct |
18 ms |
9212 KB |
Output is correct |
57 |
Correct |
7 ms |
8288 KB |
Output is correct |
58 |
Correct |
7 ms |
9076 KB |
Output is correct |
59 |
Correct |
8 ms |
9076 KB |
Output is correct |
60 |
Correct |
18 ms |
9080 KB |
Output is correct |
61 |
Correct |
9 ms |
9092 KB |
Output is correct |
62 |
Correct |
32 ms |
9212 KB |
Output is correct |
63 |
Correct |
44 ms |
8692 KB |
Output is correct |
64 |
Correct |
51 ms |
8680 KB |
Output is correct |
65 |
Correct |
88 ms |
8812 KB |
Output is correct |
66 |
Correct |
129 ms |
9076 KB |
Output is correct |
67 |
Correct |
143 ms |
9080 KB |
Output is correct |