#include <bits/stdc++.h>
using namespace std;
typedef pair<int, int> p;
int n, m, s, t;
vector<int> g[30303];
int dst[30303];
int main(){
ios_base::sync_with_stdio(0); cin.tie(0);
cin >> n >> m;
for(int i=0; i<m; i++){
int a, b; cin >> a >> b;
g[a].push_back(b);
if(i == 0) s = a;
else if(i == 1) t = a;
}
memset(dst, 0x3f, sizeof dst);
priority_queue<p> pq;
pq.emplace(0, s); dst[s] = 0;
while(pq.size()){
int now = pq.top().second;
int cst = -pq.top().first;
pq.pop();
if(dst[now] < cst) continue;
for(auto i : g[now]){
for(int j=0; now+i*j<n; j++) if(dst[now+i*j] > cst + j){
dst[now+i*j] = cst + j;
pq.emplace(-(cst+j), now+i*j);
}
for(int j=1; now-i*j>=0; j++) if(dst[now-i*j] > cst + j){
dst[now-i*j] = cst + j;
pq.emplace(-(cst+j), now-i*j);
}
}
}
if(dst[t] == 0x3f3f3f3f) cout << -1;
else cout << dst[t];
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 2 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 3 |
Correct |
6 ms |
1152 KB |
Output is correct |
| 4 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 5 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 6 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 7 |
Correct |
5 ms |
1152 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 2 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 3 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 4 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 5 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 6 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 7 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 8 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 9 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 10 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 11 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 12 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 13 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 14 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 15 |
Correct |
5 ms |
1152 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 2 |
Correct |
6 ms |
1152 KB |
Output is correct |
| 3 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 4 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 5 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 6 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 7 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 8 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 9 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 10 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 11 |
Correct |
6 ms |
1152 KB |
Output is correct |
| 12 |
Correct |
6 ms |
1152 KB |
Output is correct |
| 13 |
Correct |
6 ms |
1152 KB |
Output is correct |
| 14 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 15 |
Correct |
5 ms |
1280 KB |
Output is correct |
| 16 |
Correct |
6 ms |
1152 KB |
Output is correct |
| 17 |
Correct |
6 ms |
1280 KB |
Output is correct |
| 18 |
Correct |
6 ms |
1280 KB |
Output is correct |
| 19 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 20 |
Correct |
9 ms |
1280 KB |
Output is correct |
| 21 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 22 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 23 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 24 |
Correct |
6 ms |
1280 KB |
Output is correct |
| 25 |
Correct |
6 ms |
1280 KB |
Output is correct |
| 26 |
Correct |
9 ms |
1152 KB |
Output is correct |
| 27 |
Correct |
9 ms |
1280 KB |
Output is correct |
| 28 |
Correct |
6 ms |
1280 KB |
Output is correct |
| 29 |
Correct |
6 ms |
1280 KB |
Output is correct |
| 30 |
Correct |
6 ms |
1280 KB |
Output is correct |
| 31 |
Correct |
6 ms |
1280 KB |
Output is correct |
| 32 |
Correct |
6 ms |
1280 KB |
Output is correct |
| 33 |
Correct |
6 ms |
1408 KB |
Output is correct |
| 34 |
Correct |
6 ms |
1408 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 2 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 3 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 4 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 5 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 6 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 7 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 8 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 9 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 10 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 11 |
Correct |
6 ms |
1280 KB |
Output is correct |
| 12 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 13 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 14 |
Correct |
6 ms |
1152 KB |
Output is correct |
| 15 |
Correct |
6 ms |
1280 KB |
Output is correct |
| 16 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 17 |
Correct |
7 ms |
1312 KB |
Output is correct |
| 18 |
Correct |
5 ms |
1280 KB |
Output is correct |
| 19 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 20 |
Correct |
9 ms |
1280 KB |
Output is correct |
| 21 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 22 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 23 |
Correct |
5 ms |
1280 KB |
Output is correct |
| 24 |
Correct |
6 ms |
1280 KB |
Output is correct |
| 25 |
Correct |
6 ms |
1280 KB |
Output is correct |
| 26 |
Correct |
11 ms |
1152 KB |
Output is correct |
| 27 |
Correct |
10 ms |
1152 KB |
Output is correct |
| 28 |
Correct |
6 ms |
1280 KB |
Output is correct |
| 29 |
Correct |
7 ms |
1280 KB |
Output is correct |
| 30 |
Correct |
6 ms |
1280 KB |
Output is correct |
| 31 |
Correct |
6 ms |
1280 KB |
Output is correct |
| 32 |
Correct |
6 ms |
1280 KB |
Output is correct |
| 33 |
Correct |
6 ms |
1280 KB |
Output is correct |
| 34 |
Correct |
7 ms |
1408 KB |
Output is correct |
| 35 |
Correct |
11 ms |
1664 KB |
Output is correct |
| 36 |
Correct |
7 ms |
1280 KB |
Output is correct |
| 37 |
Correct |
10 ms |
1664 KB |
Output is correct |
| 38 |
Correct |
12 ms |
1792 KB |
Output is correct |
| 39 |
Correct |
12 ms |
1792 KB |
Output is correct |
| 40 |
Correct |
13 ms |
1792 KB |
Output is correct |
| 41 |
Correct |
13 ms |
1792 KB |
Output is correct |
| 42 |
Correct |
65 ms |
1672 KB |
Output is correct |
| 43 |
Correct |
64 ms |
1664 KB |
Output is correct |
| 44 |
Correct |
71 ms |
1664 KB |
Output is correct |
| 45 |
Correct |
11 ms |
1664 KB |
Output is correct |
| 46 |
Correct |
12 ms |
1664 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 2 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 3 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 4 |
Correct |
5 ms |
1200 KB |
Output is correct |
| 5 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 6 |
Correct |
6 ms |
1152 KB |
Output is correct |
| 7 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 8 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 9 |
Correct |
6 ms |
1152 KB |
Output is correct |
| 10 |
Correct |
6 ms |
1152 KB |
Output is correct |
| 11 |
Correct |
5 ms |
1280 KB |
Output is correct |
| 12 |
Correct |
6 ms |
1152 KB |
Output is correct |
| 13 |
Correct |
5 ms |
1280 KB |
Output is correct |
| 14 |
Correct |
6 ms |
1152 KB |
Output is correct |
| 15 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 16 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 17 |
Correct |
6 ms |
1280 KB |
Output is correct |
| 18 |
Correct |
6 ms |
1152 KB |
Output is correct |
| 19 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 20 |
Correct |
9 ms |
1280 KB |
Output is correct |
| 21 |
Correct |
5 ms |
1280 KB |
Output is correct |
| 22 |
Correct |
5 ms |
1152 KB |
Output is correct |
| 23 |
Correct |
6 ms |
1152 KB |
Output is correct |
| 24 |
Correct |
6 ms |
1280 KB |
Output is correct |
| 25 |
Correct |
6 ms |
1280 KB |
Output is correct |
| 26 |
Correct |
9 ms |
1152 KB |
Output is correct |
| 27 |
Correct |
9 ms |
1280 KB |
Output is correct |
| 28 |
Correct |
6 ms |
1280 KB |
Output is correct |
| 29 |
Correct |
6 ms |
1280 KB |
Output is correct |
| 30 |
Correct |
6 ms |
1280 KB |
Output is correct |
| 31 |
Correct |
7 ms |
1280 KB |
Output is correct |
| 32 |
Correct |
6 ms |
1280 KB |
Output is correct |
| 33 |
Correct |
7 ms |
1280 KB |
Output is correct |
| 34 |
Correct |
6 ms |
1408 KB |
Output is correct |
| 35 |
Correct |
11 ms |
1664 KB |
Output is correct |
| 36 |
Correct |
6 ms |
1280 KB |
Output is correct |
| 37 |
Correct |
11 ms |
1664 KB |
Output is correct |
| 38 |
Correct |
13 ms |
1792 KB |
Output is correct |
| 39 |
Correct |
14 ms |
1792 KB |
Output is correct |
| 40 |
Correct |
12 ms |
1792 KB |
Output is correct |
| 41 |
Correct |
12 ms |
1792 KB |
Output is correct |
| 42 |
Correct |
65 ms |
1664 KB |
Output is correct |
| 43 |
Correct |
67 ms |
1664 KB |
Output is correct |
| 44 |
Correct |
64 ms |
1664 KB |
Output is correct |
| 45 |
Correct |
12 ms |
1664 KB |
Output is correct |
| 46 |
Correct |
11 ms |
1664 KB |
Output is correct |
| 47 |
Correct |
24 ms |
2428 KB |
Output is correct |
| 48 |
Correct |
11 ms |
1920 KB |
Output is correct |
| 49 |
Correct |
12 ms |
1920 KB |
Output is correct |
| 50 |
Correct |
9 ms |
1664 KB |
Output is correct |
| 51 |
Correct |
35 ms |
3320 KB |
Output is correct |
| 52 |
Correct |
30 ms |
2684 KB |
Output is correct |
| 53 |
Correct |
20 ms |
2812 KB |
Output is correct |
| 54 |
Correct |
6 ms |
1408 KB |
Output is correct |
| 55 |
Correct |
7 ms |
1416 KB |
Output is correct |
| 56 |
Correct |
799 ms |
2688 KB |
Output is correct |
| 57 |
Correct |
54 ms |
3440 KB |
Output is correct |
| 58 |
Correct |
776 ms |
1664 KB |
Output is correct |
| 59 |
Correct |
850 ms |
1920 KB |
Output is correct |
| 60 |
Correct |
767 ms |
1792 KB |
Output is correct |
| 61 |
Correct |
732 ms |
1832 KB |
Output is correct |
| 62 |
Correct |
16 ms |
2432 KB |
Output is correct |
| 63 |
Correct |
28 ms |
2808 KB |
Output is correct |
| 64 |
Correct |
29 ms |
2808 KB |
Output is correct |
| 65 |
Correct |
31 ms |
2808 KB |
Output is correct |
| 66 |
Correct |
39 ms |
3700 KB |
Output is correct |
| 67 |
Correct |
41 ms |
3700 KB |
Output is correct |
