#include <iostream>
#include <algorithm>
#include <deque>
using namespace std;
int B[30000], P[30000];
vector<int> A[30000];
int vis[2000][30001];
int main() {
int N, M; cin >> N >> M;
for(int i = 0; i < M; i++) {
cin >> B[i] >> P[i];
A[B[i]].push_back(i);
}
int ans = -1;
deque<pair<int, int> > Q;
Q.push_back({B[0], M});
vis[B[0]][M] = 1;
while(!Q.empty()) {
auto it = Q.front(); Q.pop_front();
int i = it.first, j = it.second;
if(i == B[1]) {
ans = vis[i][j];
break;
}
if(j == M) {
for(int k: A[i]) {
if(!vis[i][k]) {
vis[i][k] = vis[i][j];
Q.push_front({i, k});
}
}
}
else {
if(i - P[j] >= 0 && !vis[i - P[j]][j]) {
vis[i - P[j]][j] = vis[i][j] + 1;
Q.push_back({i - P[j], j});
}
if(i + P[j] < N && !vis[i + P[j]][j]) {
vis[i + P[j]][j] = vis[i][j] + 1;
Q.push_back({i + P[j], j});
}
if(!vis[i][M]) {
vis[i][M] = vis[i][j];
Q.push_front({i, M});
}
}
}
if(ans != -1) ans -= 1;
cout << ans << endl;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
237340 KB |
Output is correct |
2 |
Correct |
0 ms |
237340 KB |
Output is correct |
3 |
Correct |
0 ms |
237340 KB |
Output is correct |
4 |
Correct |
0 ms |
237340 KB |
Output is correct |
5 |
Correct |
0 ms |
237340 KB |
Output is correct |
6 |
Correct |
0 ms |
237340 KB |
Output is correct |
7 |
Correct |
0 ms |
237340 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
237340 KB |
Output is correct |
2 |
Correct |
0 ms |
237340 KB |
Output is correct |
3 |
Correct |
0 ms |
237340 KB |
Output is correct |
4 |
Correct |
0 ms |
237340 KB |
Output is correct |
5 |
Correct |
0 ms |
237340 KB |
Output is correct |
6 |
Correct |
0 ms |
237340 KB |
Output is correct |
7 |
Correct |
0 ms |
237340 KB |
Output is correct |
8 |
Correct |
0 ms |
237340 KB |
Output is correct |
9 |
Correct |
0 ms |
237340 KB |
Output is correct |
10 |
Correct |
0 ms |
237340 KB |
Output is correct |
11 |
Correct |
0 ms |
237340 KB |
Output is correct |
12 |
Correct |
0 ms |
237340 KB |
Output is correct |
13 |
Correct |
0 ms |
237340 KB |
Output is correct |
14 |
Correct |
0 ms |
237340 KB |
Output is correct |
15 |
Correct |
0 ms |
237340 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
237340 KB |
Output is correct |
2 |
Correct |
0 ms |
237340 KB |
Output is correct |
3 |
Correct |
0 ms |
237340 KB |
Output is correct |
4 |
Correct |
0 ms |
237340 KB |
Output is correct |
5 |
Correct |
0 ms |
237340 KB |
Output is correct |
6 |
Correct |
0 ms |
237340 KB |
Output is correct |
7 |
Correct |
0 ms |
237340 KB |
Output is correct |
8 |
Correct |
0 ms |
237340 KB |
Output is correct |
9 |
Correct |
0 ms |
237340 KB |
Output is correct |
10 |
Correct |
0 ms |
237340 KB |
Output is correct |
11 |
Correct |
0 ms |
237340 KB |
Output is correct |
12 |
Correct |
0 ms |
237340 KB |
Output is correct |
13 |
Correct |
3 ms |
237340 KB |
Output is correct |
14 |
Correct |
0 ms |
237340 KB |
Output is correct |
15 |
Correct |
3 ms |
237340 KB |
Output is correct |
16 |
Correct |
0 ms |
237340 KB |
Output is correct |
17 |
Correct |
0 ms |
237340 KB |
Output is correct |
18 |
Correct |
0 ms |
237340 KB |
Output is correct |
19 |
Correct |
0 ms |
237340 KB |
Output is correct |
20 |
Correct |
153 ms |
237472 KB |
Output is correct |
21 |
Correct |
0 ms |
237340 KB |
Output is correct |
22 |
Correct |
0 ms |
237340 KB |
Output is correct |
23 |
Correct |
0 ms |
237340 KB |
Output is correct |
24 |
Correct |
3 ms |
237340 KB |
Output is correct |
25 |
Correct |
3 ms |
237340 KB |
Output is correct |
26 |
Correct |
3 ms |
237340 KB |
Output is correct |
27 |
Correct |
3 ms |
237340 KB |
Output is correct |
28 |
Correct |
13 ms |
237472 KB |
Output is correct |
29 |
Correct |
9 ms |
237340 KB |
Output is correct |
30 |
Correct |
6 ms |
237340 KB |
Output is correct |
31 |
Correct |
3 ms |
237340 KB |
Output is correct |
32 |
Correct |
6 ms |
237340 KB |
Output is correct |
33 |
Correct |
9 ms |
237340 KB |
Output is correct |
34 |
Correct |
9 ms |
237340 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
237340 KB |
Output is correct |
2 |
Correct |
0 ms |
237340 KB |
Output is correct |
3 |
Correct |
0 ms |
237340 KB |
Output is correct |
4 |
Correct |
0 ms |
237340 KB |
Output is correct |
5 |
Correct |
0 ms |
237340 KB |
Output is correct |
6 |
Correct |
0 ms |
237340 KB |
Output is correct |
7 |
Correct |
0 ms |
237340 KB |
Output is correct |
8 |
Correct |
0 ms |
237340 KB |
Output is correct |
9 |
Correct |
0 ms |
237340 KB |
Output is correct |
10 |
Correct |
0 ms |
237340 KB |
Output is correct |
11 |
Correct |
0 ms |
237340 KB |
Output is correct |
12 |
Correct |
0 ms |
237340 KB |
Output is correct |
13 |
Correct |
3 ms |
237340 KB |
Output is correct |
14 |
Correct |
0 ms |
237340 KB |
Output is correct |
15 |
Correct |
0 ms |
237340 KB |
Output is correct |
16 |
Correct |
0 ms |
237340 KB |
Output is correct |
17 |
Correct |
3 ms |
237340 KB |
Output is correct |
18 |
Correct |
0 ms |
237340 KB |
Output is correct |
19 |
Correct |
0 ms |
237340 KB |
Output is correct |
20 |
Correct |
179 ms |
237472 KB |
Output is correct |
21 |
Correct |
0 ms |
237340 KB |
Output is correct |
22 |
Correct |
0 ms |
237340 KB |
Output is correct |
23 |
Correct |
0 ms |
237340 KB |
Output is correct |
24 |
Correct |
6 ms |
237340 KB |
Output is correct |
25 |
Correct |
3 ms |
237340 KB |
Output is correct |
26 |
Correct |
0 ms |
237340 KB |
Output is correct |
27 |
Correct |
6 ms |
237340 KB |
Output is correct |
28 |
Correct |
9 ms |
237472 KB |
Output is correct |
29 |
Correct |
9 ms |
237340 KB |
Output is correct |
30 |
Correct |
3 ms |
237340 KB |
Output is correct |
31 |
Correct |
13 ms |
237340 KB |
Output is correct |
32 |
Correct |
6 ms |
237340 KB |
Output is correct |
33 |
Correct |
16 ms |
237340 KB |
Output is correct |
34 |
Correct |
9 ms |
237340 KB |
Output is correct |
35 |
Correct |
29 ms |
237736 KB |
Output is correct |
36 |
Correct |
3 ms |
237472 KB |
Output is correct |
37 |
Correct |
19 ms |
237736 KB |
Output is correct |
38 |
Correct |
23 ms |
237736 KB |
Output is correct |
39 |
Correct |
19 ms |
237604 KB |
Output is correct |
40 |
Correct |
23 ms |
237604 KB |
Output is correct |
41 |
Correct |
43 ms |
237736 KB |
Output is correct |
42 |
Correct |
13 ms |
237616 KB |
Output is correct |
43 |
Correct |
16 ms |
237616 KB |
Output is correct |
44 |
Correct |
283 ms |
238000 KB |
Output is correct |
45 |
Correct |
139 ms |
237736 KB |
Output is correct |
46 |
Correct |
106 ms |
237736 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
237340 KB |
Output is correct |
2 |
Correct |
0 ms |
237340 KB |
Output is correct |
3 |
Correct |
0 ms |
237340 KB |
Output is correct |
4 |
Correct |
0 ms |
237340 KB |
Output is correct |
5 |
Correct |
0 ms |
237340 KB |
Output is correct |
6 |
Correct |
0 ms |
237340 KB |
Output is correct |
7 |
Correct |
0 ms |
237340 KB |
Output is correct |
8 |
Correct |
0 ms |
237340 KB |
Output is correct |
9 |
Correct |
0 ms |
237340 KB |
Output is correct |
10 |
Correct |
0 ms |
237340 KB |
Output is correct |
11 |
Correct |
3 ms |
237340 KB |
Output is correct |
12 |
Correct |
0 ms |
237340 KB |
Output is correct |
13 |
Correct |
3 ms |
237340 KB |
Output is correct |
14 |
Correct |
3 ms |
237340 KB |
Output is correct |
15 |
Correct |
3 ms |
237340 KB |
Output is correct |
16 |
Correct |
0 ms |
237340 KB |
Output is correct |
17 |
Correct |
0 ms |
237340 KB |
Output is correct |
18 |
Correct |
0 ms |
237340 KB |
Output is correct |
19 |
Correct |
0 ms |
237340 KB |
Output is correct |
20 |
Correct |
169 ms |
237472 KB |
Output is correct |
21 |
Correct |
0 ms |
237340 KB |
Output is correct |
22 |
Correct |
0 ms |
237340 KB |
Output is correct |
23 |
Correct |
0 ms |
237340 KB |
Output is correct |
24 |
Correct |
9 ms |
237340 KB |
Output is correct |
25 |
Correct |
0 ms |
237340 KB |
Output is correct |
26 |
Correct |
6 ms |
237340 KB |
Output is correct |
27 |
Correct |
9 ms |
237340 KB |
Output is correct |
28 |
Correct |
6 ms |
237472 KB |
Output is correct |
29 |
Correct |
3 ms |
237340 KB |
Output is correct |
30 |
Correct |
3 ms |
237340 KB |
Output is correct |
31 |
Correct |
0 ms |
237340 KB |
Output is correct |
32 |
Correct |
0 ms |
237340 KB |
Output is correct |
33 |
Correct |
16 ms |
237340 KB |
Output is correct |
34 |
Correct |
0 ms |
237340 KB |
Output is correct |
35 |
Correct |
43 ms |
237736 KB |
Output is correct |
36 |
Correct |
3 ms |
237472 KB |
Output is correct |
37 |
Correct |
26 ms |
237736 KB |
Output is correct |
38 |
Correct |
29 ms |
237736 KB |
Output is correct |
39 |
Correct |
19 ms |
237604 KB |
Output is correct |
40 |
Correct |
23 ms |
237604 KB |
Output is correct |
41 |
Correct |
36 ms |
237736 KB |
Output is correct |
42 |
Correct |
19 ms |
237616 KB |
Output is correct |
43 |
Correct |
23 ms |
237616 KB |
Output is correct |
44 |
Correct |
323 ms |
238000 KB |
Output is correct |
45 |
Correct |
126 ms |
237736 KB |
Output is correct |
46 |
Correct |
99 ms |
237736 KB |
Output is correct |
47 |
Runtime error |
13 ms |
237736 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
48 |
Halted |
0 ms |
0 KB |
- |