#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<ll,ll> pll;
typedef pair<int,int> pii;
const int N = 3e4+4;
const ll inf = 1e18;
int n,m;
map<int,vector<int>> d1[N];
bool vis[N];
vector<pii> adj[N];
ll dis[N];
priority_queue<pll, vector<pll>, greater<pll>> d3;
int S,T;
int main(){
ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
cin >> n >> m;
for (int i=0,pos,p; i<m; i++){ cin >> pos >> p;
d1[p][pos%p].push_back(pos);
if (i == 0) S = pos;
if (i == 1) T = pos;
}
for (int p=0; p<n; p++) for (auto &[x, d2] : d1[p]){ int l = x;
for (int i : d2) vis[i] = 1;
for (int last=-1; l<n; l+=p){
if (last != -1) adj[last].push_back({l, (l-last)/p});
if (vis[l]) last = l;
}
l -= p;
for (int last=-1; l>=0; l-=p){
if (last != -1) adj[last].push_back({l, (last-l)/p});
if (vis[l]) last = l;
}
for (int i : d2) vis[i] = 0;
}
for (int i=0; i<n; i++) dis[i] = inf;
d3.push({dis[S] = 0, S});
for (; d3.size(); ){ auto [w, u] = d3.top(); d3.pop();
if (w != dis[u]) continue;
for (auto [v, we] : adj[u]) if (dis[v] > w + we)
d3.push({dis[v] = w + we, v});
}
cout << (dis[T] == inf ? -1 : dis[T]) << "\n";
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
2388 KB |
Output is correct |
| 2 |
Correct |
1 ms |
2388 KB |
Output is correct |
| 3 |
Correct |
2 ms |
2364 KB |
Output is correct |
| 4 |
Correct |
1 ms |
2388 KB |
Output is correct |
| 5 |
Correct |
2 ms |
2388 KB |
Output is correct |
| 6 |
Correct |
2 ms |
2388 KB |
Output is correct |
| 7 |
Correct |
2 ms |
2388 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
2388 KB |
Output is correct |
| 2 |
Correct |
2 ms |
2408 KB |
Output is correct |
| 3 |
Correct |
2 ms |
2388 KB |
Output is correct |
| 4 |
Correct |
2 ms |
2388 KB |
Output is correct |
| 5 |
Correct |
2 ms |
2388 KB |
Output is correct |
| 6 |
Correct |
2 ms |
2388 KB |
Output is correct |
| 7 |
Correct |
1 ms |
2388 KB |
Output is correct |
| 8 |
Correct |
2 ms |
2388 KB |
Output is correct |
| 9 |
Correct |
1 ms |
2388 KB |
Output is correct |
| 10 |
Correct |
1 ms |
2388 KB |
Output is correct |
| 11 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 12 |
Correct |
2 ms |
2388 KB |
Output is correct |
| 13 |
Correct |
2 ms |
2388 KB |
Output is correct |
| 14 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 15 |
Correct |
2 ms |
2644 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
2388 KB |
Output is correct |
| 2 |
Correct |
2 ms |
2388 KB |
Output is correct |
| 3 |
Correct |
2 ms |
2388 KB |
Output is correct |
| 4 |
Correct |
2 ms |
2388 KB |
Output is correct |
| 5 |
Correct |
2 ms |
2388 KB |
Output is correct |
| 6 |
Correct |
2 ms |
2388 KB |
Output is correct |
| 7 |
Correct |
1 ms |
2388 KB |
Output is correct |
| 8 |
Correct |
1 ms |
2388 KB |
Output is correct |
| 9 |
Correct |
1 ms |
2388 KB |
Output is correct |
| 10 |
Correct |
2 ms |
2388 KB |
Output is correct |
| 11 |
Correct |
3 ms |
2644 KB |
Output is correct |
| 12 |
Correct |
2 ms |
2388 KB |
Output is correct |
| 13 |
Correct |
2 ms |
2388 KB |
Output is correct |
| 14 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 15 |
Correct |
3 ms |
2644 KB |
Output is correct |
| 16 |
Correct |
2 ms |
2516 KB |
Output is correct |
| 17 |
Correct |
3 ms |
2772 KB |
Output is correct |
| 18 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 19 |
Correct |
2 ms |
2516 KB |
Output is correct |
| 20 |
Correct |
2 ms |
2532 KB |
Output is correct |
| 21 |
Correct |
2 ms |
2516 KB |
Output is correct |
| 22 |
Correct |
2 ms |
2516 KB |
Output is correct |
| 23 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 24 |
Correct |
4 ms |
2772 KB |
Output is correct |
| 25 |
Correct |
3 ms |
2772 KB |
Output is correct |
| 26 |
Correct |
2 ms |
2516 KB |
Output is correct |
| 27 |
Correct |
2 ms |
2516 KB |
Output is correct |
| 28 |
Correct |
3 ms |
2900 KB |
Output is correct |
| 29 |
Correct |
5 ms |
3540 KB |
Output is correct |
| 30 |
Correct |
2 ms |
2900 KB |
Output is correct |
| 31 |
Correct |
3 ms |
3028 KB |
Output is correct |
| 32 |
Correct |
3 ms |
2900 KB |
Output is correct |
| 33 |
Correct |
7 ms |
4452 KB |
Output is correct |
| 34 |
Correct |
8 ms |
4412 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
2388 KB |
Output is correct |
| 2 |
Correct |
2 ms |
2448 KB |
Output is correct |
| 3 |
Correct |
2 ms |
2388 KB |
Output is correct |
| 4 |
Correct |
1 ms |
2388 KB |
Output is correct |
| 5 |
Correct |
1 ms |
2388 KB |
Output is correct |
| 6 |
Correct |
2 ms |
2388 KB |
Output is correct |
| 7 |
Correct |
2 ms |
2388 KB |
Output is correct |
| 8 |
Correct |
2 ms |
2388 KB |
Output is correct |
| 9 |
Correct |
2 ms |
2388 KB |
Output is correct |
| 10 |
Correct |
2 ms |
2388 KB |
Output is correct |
| 11 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 12 |
Correct |
1 ms |
2388 KB |
Output is correct |
| 13 |
Correct |
2 ms |
2388 KB |
Output is correct |
| 14 |
Correct |
3 ms |
2644 KB |
Output is correct |
| 15 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 16 |
Correct |
2 ms |
2516 KB |
Output is correct |
| 17 |
Correct |
3 ms |
2772 KB |
Output is correct |
| 18 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 19 |
Correct |
2 ms |
2516 KB |
Output is correct |
| 20 |
Correct |
2 ms |
2516 KB |
Output is correct |
| 21 |
Correct |
2 ms |
2516 KB |
Output is correct |
| 22 |
Correct |
2 ms |
2516 KB |
Output is correct |
| 23 |
Correct |
3 ms |
2644 KB |
Output is correct |
| 24 |
Correct |
3 ms |
2772 KB |
Output is correct |
| 25 |
Correct |
5 ms |
2772 KB |
Output is correct |
| 26 |
Correct |
3 ms |
2516 KB |
Output is correct |
| 27 |
Correct |
2 ms |
2516 KB |
Output is correct |
| 28 |
Correct |
2 ms |
2900 KB |
Output is correct |
| 29 |
Correct |
4 ms |
3556 KB |
Output is correct |
| 30 |
Correct |
2 ms |
2900 KB |
Output is correct |
| 31 |
Correct |
3 ms |
3028 KB |
Output is correct |
| 32 |
Correct |
3 ms |
2900 KB |
Output is correct |
| 33 |
Correct |
7 ms |
4452 KB |
Output is correct |
| 34 |
Correct |
7 ms |
4452 KB |
Output is correct |
| 35 |
Correct |
14 ms |
6284 KB |
Output is correct |
| 36 |
Correct |
4 ms |
3156 KB |
Output is correct |
| 37 |
Correct |
20 ms |
6632 KB |
Output is correct |
| 38 |
Correct |
31 ms |
7528 KB |
Output is correct |
| 39 |
Correct |
23 ms |
7652 KB |
Output is correct |
| 40 |
Correct |
20 ms |
7820 KB |
Output is correct |
| 41 |
Correct |
19 ms |
7788 KB |
Output is correct |
| 42 |
Correct |
5 ms |
2900 KB |
Output is correct |
| 43 |
Correct |
6 ms |
2844 KB |
Output is correct |
| 44 |
Correct |
6 ms |
2836 KB |
Output is correct |
| 45 |
Correct |
28 ms |
10776 KB |
Output is correct |
| 46 |
Correct |
25 ms |
10844 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
2388 KB |
Output is correct |
| 2 |
Correct |
1 ms |
2388 KB |
Output is correct |
| 3 |
Correct |
2 ms |
2388 KB |
Output is correct |
| 4 |
Correct |
1 ms |
2388 KB |
Output is correct |
| 5 |
Correct |
2 ms |
2388 KB |
Output is correct |
| 6 |
Correct |
2 ms |
2388 KB |
Output is correct |
| 7 |
Correct |
2 ms |
2388 KB |
Output is correct |
| 8 |
Correct |
1 ms |
2388 KB |
Output is correct |
| 9 |
Correct |
1 ms |
2388 KB |
Output is correct |
| 10 |
Correct |
1 ms |
2388 KB |
Output is correct |
| 11 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 12 |
Correct |
1 ms |
2388 KB |
Output is correct |
| 13 |
Correct |
2 ms |
2388 KB |
Output is correct |
| 14 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 15 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 16 |
Correct |
2 ms |
2516 KB |
Output is correct |
| 17 |
Correct |
3 ms |
2772 KB |
Output is correct |
| 18 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 19 |
Correct |
1 ms |
2516 KB |
Output is correct |
| 20 |
Correct |
2 ms |
2516 KB |
Output is correct |
| 21 |
Correct |
3 ms |
2516 KB |
Output is correct |
| 22 |
Correct |
2 ms |
2516 KB |
Output is correct |
| 23 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 24 |
Correct |
3 ms |
2772 KB |
Output is correct |
| 25 |
Correct |
3 ms |
2772 KB |
Output is correct |
| 26 |
Correct |
2 ms |
2516 KB |
Output is correct |
| 27 |
Correct |
2 ms |
2516 KB |
Output is correct |
| 28 |
Correct |
3 ms |
2900 KB |
Output is correct |
| 29 |
Correct |
5 ms |
3540 KB |
Output is correct |
| 30 |
Correct |
2 ms |
2900 KB |
Output is correct |
| 31 |
Correct |
3 ms |
3028 KB |
Output is correct |
| 32 |
Correct |
3 ms |
2900 KB |
Output is correct |
| 33 |
Correct |
7 ms |
4452 KB |
Output is correct |
| 34 |
Correct |
7 ms |
4452 KB |
Output is correct |
| 35 |
Correct |
14 ms |
6228 KB |
Output is correct |
| 36 |
Correct |
4 ms |
3156 KB |
Output is correct |
| 37 |
Correct |
13 ms |
6620 KB |
Output is correct |
| 38 |
Correct |
22 ms |
7500 KB |
Output is correct |
| 39 |
Correct |
21 ms |
7508 KB |
Output is correct |
| 40 |
Correct |
19 ms |
7776 KB |
Output is correct |
| 41 |
Correct |
18 ms |
7764 KB |
Output is correct |
| 42 |
Correct |
5 ms |
2924 KB |
Output is correct |
| 43 |
Correct |
6 ms |
2900 KB |
Output is correct |
| 44 |
Correct |
5 ms |
2844 KB |
Output is correct |
| 45 |
Correct |
26 ms |
10808 KB |
Output is correct |
| 46 |
Correct |
27 ms |
10820 KB |
Output is correct |
| 47 |
Correct |
46 ms |
15052 KB |
Output is correct |
| 48 |
Correct |
18 ms |
7664 KB |
Output is correct |
| 49 |
Correct |
14 ms |
6612 KB |
Output is correct |
| 50 |
Correct |
13 ms |
5972 KB |
Output is correct |
| 51 |
Correct |
37 ms |
10668 KB |
Output is correct |
| 52 |
Correct |
37 ms |
11336 KB |
Output is correct |
| 53 |
Correct |
23 ms |
8244 KB |
Output is correct |
| 54 |
Correct |
4 ms |
3212 KB |
Output is correct |
| 55 |
Correct |
7 ms |
3796 KB |
Output is correct |
| 56 |
Correct |
11 ms |
3948 KB |
Output is correct |
| 57 |
Correct |
36 ms |
12100 KB |
Output is correct |
| 58 |
Correct |
10 ms |
4172 KB |
Output is correct |
| 59 |
Correct |
13 ms |
4592 KB |
Output is correct |
| 60 |
Correct |
12 ms |
5144 KB |
Output is correct |
| 61 |
Correct |
11 ms |
4688 KB |
Output is correct |
| 62 |
Correct |
30 ms |
11196 KB |
Output is correct |
| 63 |
Correct |
88 ms |
31708 KB |
Output is correct |
| 64 |
Correct |
93 ms |
40240 KB |
Output is correct |
| 65 |
Correct |
122 ms |
50168 KB |
Output is correct |
| 66 |
Correct |
205 ms |
80056 KB |
Output is correct |
| 67 |
Correct |
202 ms |
80024 KB |
Output is correct |
