#include <bits/stdc++.h>
using namespace std;
using ll = long long int;
#define F first
#define S second
#define fast_io ios::sync_with_stdio(false);cin.tie(nullptr);cout.tie(nullptr);
const int N=5e4+10,LN=30,SQ=550,M=1e5+10;
const ll INF=1e15;
const int MOD=1000000007 /*998244353*/;
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
using pll=pair<ll,ll>;
using pii=pair<int,int>;
#define ordered_set tree<pll, null_type,less<pll>, rb_tree_tag,tree_order_statistics_node_update>
ll pow(ll x, ll y, ll mod){
ll ans=1;
while (y != 0) {
if (y & 1) ans = ans * x % mod;
y >>= 1;
x = x * x % mod;
}
return ans;
}
ll n,m,s,t,h[N];
vector<ll> adj[N];
priority_queue<pll> q;
int main(){
fast_io;
cin >> n >> m;
for(ll i=0; i<m; i++){
ll b,p;
cin >> b >> p;
if(i==0) s=b;
if(i==1) t=b;
adj[b].push_back(p);
}
memset(h,63,sizeof h);
h[s]=0;
q.push({0,s});
while(!q.empty()){
ll v=q.top().S,x=-q.top().F;
q.pop();
if(h[v]<x) continue;
for(ll t : adj[v]){
for(ll u=v-t,j=1; u>=0; u-=t,j++){
if(h[u]<=x+j) continue;
h[u]=x+j;
q.push({-h[u],u});
}
for(ll u=v+t,j=1; u<n; u+=t,j++){
if(h[u]<=x+j) continue;
h[u]=x+j;
q.push({-h[u],u});
}
}
}
if(h[t]<=INF) cout << h[t] << '\n';
else cout << -1 << '\n';
return 0;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
1920 KB |
Output is correct |
2 |
Correct |
1 ms |
1920 KB |
Output is correct |
3 |
Correct |
1 ms |
1920 KB |
Output is correct |
4 |
Correct |
1 ms |
1920 KB |
Output is correct |
5 |
Correct |
2 ms |
1920 KB |
Output is correct |
6 |
Correct |
1 ms |
1920 KB |
Output is correct |
7 |
Correct |
1 ms |
1920 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
1920 KB |
Output is correct |
2 |
Correct |
1 ms |
1920 KB |
Output is correct |
3 |
Correct |
1 ms |
1920 KB |
Output is correct |
4 |
Correct |
2 ms |
1920 KB |
Output is correct |
5 |
Correct |
1 ms |
1920 KB |
Output is correct |
6 |
Correct |
2 ms |
1920 KB |
Output is correct |
7 |
Correct |
1 ms |
1920 KB |
Output is correct |
8 |
Correct |
1 ms |
1920 KB |
Output is correct |
9 |
Correct |
1 ms |
1920 KB |
Output is correct |
10 |
Correct |
2 ms |
1920 KB |
Output is correct |
11 |
Correct |
2 ms |
1920 KB |
Output is correct |
12 |
Correct |
2 ms |
1920 KB |
Output is correct |
13 |
Correct |
2 ms |
1920 KB |
Output is correct |
14 |
Correct |
2 ms |
1920 KB |
Output is correct |
15 |
Correct |
2 ms |
1920 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
1920 KB |
Output is correct |
2 |
Correct |
1 ms |
1920 KB |
Output is correct |
3 |
Correct |
1 ms |
1920 KB |
Output is correct |
4 |
Correct |
1 ms |
1920 KB |
Output is correct |
5 |
Correct |
2 ms |
1920 KB |
Output is correct |
6 |
Correct |
2 ms |
2048 KB |
Output is correct |
7 |
Correct |
1 ms |
1920 KB |
Output is correct |
8 |
Correct |
1 ms |
1920 KB |
Output is correct |
9 |
Correct |
2 ms |
1920 KB |
Output is correct |
10 |
Correct |
2 ms |
1920 KB |
Output is correct |
11 |
Correct |
2 ms |
1920 KB |
Output is correct |
12 |
Correct |
2 ms |
1920 KB |
Output is correct |
13 |
Correct |
2 ms |
1828 KB |
Output is correct |
14 |
Correct |
2 ms |
1920 KB |
Output is correct |
15 |
Correct |
2 ms |
1920 KB |
Output is correct |
16 |
Correct |
2 ms |
1920 KB |
Output is correct |
17 |
Correct |
2 ms |
1920 KB |
Output is correct |
18 |
Correct |
2 ms |
1920 KB |
Output is correct |
19 |
Correct |
2 ms |
1920 KB |
Output is correct |
20 |
Correct |
7 ms |
2048 KB |
Output is correct |
21 |
Correct |
2 ms |
1920 KB |
Output is correct |
22 |
Correct |
2 ms |
1920 KB |
Output is correct |
23 |
Correct |
2 ms |
1920 KB |
Output is correct |
24 |
Correct |
3 ms |
2048 KB |
Output is correct |
25 |
Correct |
2 ms |
2048 KB |
Output is correct |
26 |
Correct |
6 ms |
1920 KB |
Output is correct |
27 |
Correct |
6 ms |
1920 KB |
Output is correct |
28 |
Correct |
2 ms |
1920 KB |
Output is correct |
29 |
Correct |
3 ms |
2176 KB |
Output is correct |
30 |
Correct |
2 ms |
2048 KB |
Output is correct |
31 |
Correct |
2 ms |
2048 KB |
Output is correct |
32 |
Correct |
2 ms |
2048 KB |
Output is correct |
33 |
Correct |
3 ms |
2176 KB |
Output is correct |
34 |
Correct |
4 ms |
2304 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
1920 KB |
Output is correct |
2 |
Correct |
1 ms |
1920 KB |
Output is correct |
3 |
Correct |
1 ms |
1920 KB |
Output is correct |
4 |
Correct |
2 ms |
1920 KB |
Output is correct |
5 |
Correct |
1 ms |
1920 KB |
Output is correct |
6 |
Correct |
2 ms |
1920 KB |
Output is correct |
7 |
Correct |
2 ms |
1920 KB |
Output is correct |
8 |
Correct |
1 ms |
1920 KB |
Output is correct |
9 |
Correct |
1 ms |
1920 KB |
Output is correct |
10 |
Correct |
2 ms |
1920 KB |
Output is correct |
11 |
Correct |
2 ms |
1920 KB |
Output is correct |
12 |
Correct |
3 ms |
1920 KB |
Output is correct |
13 |
Correct |
2 ms |
1920 KB |
Output is correct |
14 |
Correct |
2 ms |
1920 KB |
Output is correct |
15 |
Correct |
2 ms |
1920 KB |
Output is correct |
16 |
Correct |
2 ms |
1920 KB |
Output is correct |
17 |
Correct |
2 ms |
2048 KB |
Output is correct |
18 |
Correct |
2 ms |
1920 KB |
Output is correct |
19 |
Correct |
2 ms |
1920 KB |
Output is correct |
20 |
Correct |
7 ms |
2048 KB |
Output is correct |
21 |
Correct |
2 ms |
1920 KB |
Output is correct |
22 |
Correct |
1 ms |
1920 KB |
Output is correct |
23 |
Correct |
2 ms |
2048 KB |
Output is correct |
24 |
Correct |
2 ms |
2048 KB |
Output is correct |
25 |
Correct |
3 ms |
2048 KB |
Output is correct |
26 |
Correct |
6 ms |
1920 KB |
Output is correct |
27 |
Correct |
6 ms |
1920 KB |
Output is correct |
28 |
Correct |
2 ms |
1920 KB |
Output is correct |
29 |
Correct |
3 ms |
2176 KB |
Output is correct |
30 |
Correct |
2 ms |
2048 KB |
Output is correct |
31 |
Correct |
2 ms |
2084 KB |
Output is correct |
32 |
Correct |
2 ms |
2048 KB |
Output is correct |
33 |
Correct |
4 ms |
2176 KB |
Output is correct |
34 |
Correct |
3 ms |
2304 KB |
Output is correct |
35 |
Correct |
8 ms |
2304 KB |
Output is correct |
36 |
Correct |
3 ms |
2048 KB |
Output is correct |
37 |
Correct |
7 ms |
2432 KB |
Output is correct |
38 |
Correct |
10 ms |
2560 KB |
Output is correct |
39 |
Correct |
9 ms |
2560 KB |
Output is correct |
40 |
Correct |
10 ms |
2560 KB |
Output is correct |
41 |
Correct |
10 ms |
2560 KB |
Output is correct |
42 |
Correct |
68 ms |
2304 KB |
Output is correct |
43 |
Correct |
69 ms |
2304 KB |
Output is correct |
44 |
Correct |
66 ms |
2340 KB |
Output is correct |
45 |
Correct |
8 ms |
2432 KB |
Output is correct |
46 |
Correct |
8 ms |
2464 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
1920 KB |
Output is correct |
2 |
Correct |
1 ms |
1920 KB |
Output is correct |
3 |
Correct |
1 ms |
1920 KB |
Output is correct |
4 |
Correct |
1 ms |
1920 KB |
Output is correct |
5 |
Correct |
1 ms |
1920 KB |
Output is correct |
6 |
Correct |
1 ms |
1920 KB |
Output is correct |
7 |
Correct |
1 ms |
1920 KB |
Output is correct |
8 |
Correct |
2 ms |
1920 KB |
Output is correct |
9 |
Correct |
1 ms |
1920 KB |
Output is correct |
10 |
Correct |
2 ms |
1920 KB |
Output is correct |
11 |
Correct |
3 ms |
2048 KB |
Output is correct |
12 |
Correct |
2 ms |
1920 KB |
Output is correct |
13 |
Correct |
2 ms |
1920 KB |
Output is correct |
14 |
Correct |
2 ms |
1920 KB |
Output is correct |
15 |
Correct |
2 ms |
1920 KB |
Output is correct |
16 |
Correct |
2 ms |
1920 KB |
Output is correct |
17 |
Correct |
3 ms |
1920 KB |
Output is correct |
18 |
Correct |
2 ms |
1920 KB |
Output is correct |
19 |
Correct |
2 ms |
1920 KB |
Output is correct |
20 |
Correct |
7 ms |
2048 KB |
Output is correct |
21 |
Correct |
2 ms |
1920 KB |
Output is correct |
22 |
Correct |
2 ms |
1920 KB |
Output is correct |
23 |
Correct |
2 ms |
1920 KB |
Output is correct |
24 |
Correct |
3 ms |
2048 KB |
Output is correct |
25 |
Correct |
2 ms |
2048 KB |
Output is correct |
26 |
Correct |
5 ms |
1920 KB |
Output is correct |
27 |
Correct |
7 ms |
2048 KB |
Output is correct |
28 |
Correct |
2 ms |
1920 KB |
Output is correct |
29 |
Correct |
3 ms |
2176 KB |
Output is correct |
30 |
Correct |
2 ms |
2048 KB |
Output is correct |
31 |
Correct |
2 ms |
2084 KB |
Output is correct |
32 |
Correct |
2 ms |
2048 KB |
Output is correct |
33 |
Correct |
3 ms |
2176 KB |
Output is correct |
34 |
Correct |
3 ms |
2304 KB |
Output is correct |
35 |
Correct |
8 ms |
2304 KB |
Output is correct |
36 |
Correct |
3 ms |
2048 KB |
Output is correct |
37 |
Correct |
7 ms |
2432 KB |
Output is correct |
38 |
Correct |
9 ms |
2560 KB |
Output is correct |
39 |
Correct |
9 ms |
2560 KB |
Output is correct |
40 |
Correct |
10 ms |
2560 KB |
Output is correct |
41 |
Correct |
9 ms |
2560 KB |
Output is correct |
42 |
Correct |
65 ms |
2304 KB |
Output is correct |
43 |
Correct |
72 ms |
2304 KB |
Output is correct |
44 |
Correct |
67 ms |
2340 KB |
Output is correct |
45 |
Correct |
8 ms |
2432 KB |
Output is correct |
46 |
Correct |
8 ms |
2560 KB |
Output is correct |
47 |
Correct |
18 ms |
3452 KB |
Output is correct |
48 |
Correct |
9 ms |
2432 KB |
Output is correct |
49 |
Correct |
9 ms |
2304 KB |
Output is correct |
50 |
Correct |
5 ms |
2304 KB |
Output is correct |
51 |
Correct |
31 ms |
4728 KB |
Output is correct |
52 |
Correct |
29 ms |
3708 KB |
Output is correct |
53 |
Correct |
16 ms |
3708 KB |
Output is correct |
54 |
Correct |
3 ms |
2304 KB |
Output is correct |
55 |
Correct |
3 ms |
2304 KB |
Output is correct |
56 |
Execution timed out |
1095 ms |
3456 KB |
Time limit exceeded |
57 |
Halted |
0 ms |
0 KB |
- |