#include <bits/stdc++.h>
#define int long long
#define fi first
#define se second
#define keish ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0)
using namespace std;
const int mod = 1e9 + 7;
int n, m, b, p, st, ed;
signed main(){
keish;
cin >> n >> m;
vector<vector<int>> e(n);
for(int i = 0; i < m; i++){
cin >> b >> p;
e[b].push_back(p);
if(i == 0) st = b;
if(i == 1) ed = b;
}
vector<bool> vis(n);
vector<int> dis(n, 1e18);
priority_queue<pair<int, int>> pq;
dis[st] = 0;
pq.push({0, st});
while(!pq.empty()){
auto [w, u] = pq.top(); pq.pop();
w *= -1;
if(dis[u] < w) continue;
if(u == ed){
cout << dis[u] << '\n';
return 0;
}
if(!vis[u]){
vis[u] = 1;
for(auto p : e[u]){
for(int i = 1; u + i * p < n; i++){
int v = u + i * p;
if(w + i < dis[v]){
dis[v] = w + i;
pq.push({-dis[v], v});
}
}
for(int i = 1; u - i * p >= 0; i++){
int v = u - i * p;
if(w + i < dis[v]){
dis[v] = w + i;
pq.push({-dis[v], v});
}
}
}
}
}
cout << -1 << '\n';
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
212 KB |
Output is correct |
2 |
Correct |
0 ms |
212 KB |
Output is correct |
3 |
Correct |
1 ms |
212 KB |
Output is correct |
4 |
Correct |
1 ms |
212 KB |
Output is correct |
5 |
Correct |
1 ms |
212 KB |
Output is correct |
6 |
Correct |
1 ms |
212 KB |
Output is correct |
7 |
Correct |
0 ms |
320 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
212 KB |
Output is correct |
2 |
Correct |
1 ms |
212 KB |
Output is correct |
3 |
Correct |
0 ms |
212 KB |
Output is correct |
4 |
Correct |
1 ms |
320 KB |
Output is correct |
5 |
Correct |
1 ms |
212 KB |
Output is correct |
6 |
Correct |
1 ms |
320 KB |
Output is correct |
7 |
Correct |
1 ms |
212 KB |
Output is correct |
8 |
Correct |
1 ms |
320 KB |
Output is correct |
9 |
Correct |
1 ms |
212 KB |
Output is correct |
10 |
Correct |
1 ms |
340 KB |
Output is correct |
11 |
Correct |
1 ms |
340 KB |
Output is correct |
12 |
Correct |
1 ms |
340 KB |
Output is correct |
13 |
Correct |
1 ms |
340 KB |
Output is correct |
14 |
Correct |
1 ms |
340 KB |
Output is correct |
15 |
Correct |
1 ms |
328 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
212 KB |
Output is correct |
2 |
Correct |
0 ms |
312 KB |
Output is correct |
3 |
Correct |
0 ms |
212 KB |
Output is correct |
4 |
Correct |
0 ms |
320 KB |
Output is correct |
5 |
Correct |
0 ms |
324 KB |
Output is correct |
6 |
Correct |
0 ms |
212 KB |
Output is correct |
7 |
Correct |
1 ms |
212 KB |
Output is correct |
8 |
Correct |
1 ms |
212 KB |
Output is correct |
9 |
Correct |
1 ms |
212 KB |
Output is correct |
10 |
Correct |
1 ms |
340 KB |
Output is correct |
11 |
Correct |
1 ms |
332 KB |
Output is correct |
12 |
Correct |
1 ms |
324 KB |
Output is correct |
13 |
Correct |
1 ms |
340 KB |
Output is correct |
14 |
Correct |
1 ms |
328 KB |
Output is correct |
15 |
Correct |
1 ms |
340 KB |
Output is correct |
16 |
Correct |
1 ms |
340 KB |
Output is correct |
17 |
Correct |
1 ms |
336 KB |
Output is correct |
18 |
Correct |
1 ms |
340 KB |
Output is correct |
19 |
Correct |
1 ms |
340 KB |
Output is correct |
20 |
Correct |
3 ms |
468 KB |
Output is correct |
21 |
Correct |
1 ms |
328 KB |
Output is correct |
22 |
Correct |
1 ms |
340 KB |
Output is correct |
23 |
Correct |
1 ms |
324 KB |
Output is correct |
24 |
Correct |
1 ms |
468 KB |
Output is correct |
25 |
Correct |
1 ms |
468 KB |
Output is correct |
26 |
Correct |
1 ms |
340 KB |
Output is correct |
27 |
Correct |
1 ms |
340 KB |
Output is correct |
28 |
Correct |
1 ms |
340 KB |
Output is correct |
29 |
Correct |
1 ms |
580 KB |
Output is correct |
30 |
Correct |
1 ms |
596 KB |
Output is correct |
31 |
Correct |
1 ms |
572 KB |
Output is correct |
32 |
Correct |
1 ms |
596 KB |
Output is correct |
33 |
Correct |
2 ms |
596 KB |
Output is correct |
34 |
Correct |
1 ms |
712 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
212 KB |
Output is correct |
2 |
Correct |
0 ms |
212 KB |
Output is correct |
3 |
Correct |
1 ms |
316 KB |
Output is correct |
4 |
Correct |
1 ms |
212 KB |
Output is correct |
5 |
Correct |
0 ms |
212 KB |
Output is correct |
6 |
Correct |
1 ms |
316 KB |
Output is correct |
7 |
Correct |
1 ms |
212 KB |
Output is correct |
8 |
Correct |
1 ms |
324 KB |
Output is correct |
9 |
Correct |
0 ms |
212 KB |
Output is correct |
10 |
Correct |
1 ms |
340 KB |
Output is correct |
11 |
Correct |
1 ms |
340 KB |
Output is correct |
12 |
Correct |
1 ms |
332 KB |
Output is correct |
13 |
Correct |
1 ms |
340 KB |
Output is correct |
14 |
Correct |
1 ms |
340 KB |
Output is correct |
15 |
Correct |
1 ms |
340 KB |
Output is correct |
16 |
Correct |
1 ms |
340 KB |
Output is correct |
17 |
Correct |
1 ms |
376 KB |
Output is correct |
18 |
Correct |
1 ms |
328 KB |
Output is correct |
19 |
Correct |
1 ms |
340 KB |
Output is correct |
20 |
Correct |
4 ms |
528 KB |
Output is correct |
21 |
Correct |
1 ms |
340 KB |
Output is correct |
22 |
Correct |
1 ms |
340 KB |
Output is correct |
23 |
Correct |
1 ms |
340 KB |
Output is correct |
24 |
Correct |
1 ms |
468 KB |
Output is correct |
25 |
Correct |
1 ms |
468 KB |
Output is correct |
26 |
Correct |
1 ms |
340 KB |
Output is correct |
27 |
Correct |
1 ms |
340 KB |
Output is correct |
28 |
Correct |
1 ms |
468 KB |
Output is correct |
29 |
Correct |
1 ms |
596 KB |
Output is correct |
30 |
Correct |
1 ms |
596 KB |
Output is correct |
31 |
Correct |
1 ms |
596 KB |
Output is correct |
32 |
Correct |
1 ms |
596 KB |
Output is correct |
33 |
Correct |
2 ms |
580 KB |
Output is correct |
34 |
Correct |
2 ms |
724 KB |
Output is correct |
35 |
Correct |
5 ms |
972 KB |
Output is correct |
36 |
Correct |
1 ms |
456 KB |
Output is correct |
37 |
Correct |
4 ms |
980 KB |
Output is correct |
38 |
Correct |
5 ms |
1236 KB |
Output is correct |
39 |
Correct |
4 ms |
1108 KB |
Output is correct |
40 |
Correct |
5 ms |
1236 KB |
Output is correct |
41 |
Correct |
5 ms |
1236 KB |
Output is correct |
42 |
Correct |
4 ms |
980 KB |
Output is correct |
43 |
Correct |
3 ms |
852 KB |
Output is correct |
44 |
Correct |
42 ms |
980 KB |
Output is correct |
45 |
Correct |
5 ms |
1236 KB |
Output is correct |
46 |
Correct |
5 ms |
1236 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
212 KB |
Output is correct |
2 |
Correct |
1 ms |
212 KB |
Output is correct |
3 |
Correct |
1 ms |
212 KB |
Output is correct |
4 |
Correct |
1 ms |
320 KB |
Output is correct |
5 |
Correct |
1 ms |
212 KB |
Output is correct |
6 |
Correct |
0 ms |
212 KB |
Output is correct |
7 |
Correct |
1 ms |
212 KB |
Output is correct |
8 |
Correct |
1 ms |
212 KB |
Output is correct |
9 |
Correct |
1 ms |
316 KB |
Output is correct |
10 |
Correct |
0 ms |
340 KB |
Output is correct |
11 |
Correct |
1 ms |
340 KB |
Output is correct |
12 |
Correct |
1 ms |
340 KB |
Output is correct |
13 |
Correct |
1 ms |
340 KB |
Output is correct |
14 |
Correct |
1 ms |
328 KB |
Output is correct |
15 |
Correct |
1 ms |
348 KB |
Output is correct |
16 |
Correct |
1 ms |
340 KB |
Output is correct |
17 |
Correct |
1 ms |
340 KB |
Output is correct |
18 |
Correct |
1 ms |
340 KB |
Output is correct |
19 |
Correct |
1 ms |
340 KB |
Output is correct |
20 |
Correct |
4 ms |
472 KB |
Output is correct |
21 |
Correct |
1 ms |
332 KB |
Output is correct |
22 |
Correct |
1 ms |
320 KB |
Output is correct |
23 |
Correct |
1 ms |
340 KB |
Output is correct |
24 |
Correct |
1 ms |
468 KB |
Output is correct |
25 |
Correct |
1 ms |
468 KB |
Output is correct |
26 |
Correct |
1 ms |
340 KB |
Output is correct |
27 |
Correct |
1 ms |
340 KB |
Output is correct |
28 |
Correct |
1 ms |
340 KB |
Output is correct |
29 |
Correct |
2 ms |
600 KB |
Output is correct |
30 |
Correct |
2 ms |
520 KB |
Output is correct |
31 |
Correct |
1 ms |
596 KB |
Output is correct |
32 |
Correct |
1 ms |
596 KB |
Output is correct |
33 |
Correct |
2 ms |
596 KB |
Output is correct |
34 |
Correct |
1 ms |
712 KB |
Output is correct |
35 |
Correct |
4 ms |
980 KB |
Output is correct |
36 |
Correct |
1 ms |
468 KB |
Output is correct |
37 |
Correct |
4 ms |
1024 KB |
Output is correct |
38 |
Correct |
9 ms |
1236 KB |
Output is correct |
39 |
Correct |
5 ms |
1100 KB |
Output is correct |
40 |
Correct |
5 ms |
1236 KB |
Output is correct |
41 |
Correct |
5 ms |
1236 KB |
Output is correct |
42 |
Correct |
3 ms |
980 KB |
Output is correct |
43 |
Correct |
3 ms |
972 KB |
Output is correct |
44 |
Correct |
53 ms |
980 KB |
Output is correct |
45 |
Correct |
6 ms |
1236 KB |
Output is correct |
46 |
Correct |
5 ms |
1224 KB |
Output is correct |
47 |
Correct |
7 ms |
2500 KB |
Output is correct |
48 |
Correct |
5 ms |
1748 KB |
Output is correct |
49 |
Correct |
7 ms |
1748 KB |
Output is correct |
50 |
Correct |
3 ms |
1664 KB |
Output is correct |
51 |
Correct |
12 ms |
4428 KB |
Output is correct |
52 |
Correct |
12 ms |
3280 KB |
Output is correct |
53 |
Correct |
6 ms |
2520 KB |
Output is correct |
54 |
Correct |
3 ms |
1620 KB |
Output is correct |
55 |
Correct |
2 ms |
1620 KB |
Output is correct |
56 |
Correct |
614 ms |
3032 KB |
Output is correct |
57 |
Correct |
3 ms |
3528 KB |
Output is correct |
58 |
Correct |
567 ms |
2008 KB |
Output is correct |
59 |
Correct |
6 ms |
2136 KB |
Output is correct |
60 |
Correct |
6 ms |
2016 KB |
Output is correct |
61 |
Correct |
6 ms |
2124 KB |
Output is correct |
62 |
Correct |
7 ms |
2508 KB |
Output is correct |
63 |
Correct |
19 ms |
4100 KB |
Output is correct |
64 |
Correct |
18 ms |
4048 KB |
Output is correct |
65 |
Correct |
20 ms |
4040 KB |
Output is correct |
66 |
Correct |
29 ms |
6088 KB |
Output is correct |
67 |
Correct |
21 ms |
6088 KB |
Output is correct |