#include <bits/stdc++.h>
#define pb push_back
#define f first
#define sc second
using namespace std;
typedef long long int ll;
typedef string str;
const int inf = 1e9, N = 30000;
int B[N], P[N];
vector<int> residents[N];
bitset<N> bl;
int dis[N];
vector<int> Q[N+1];
int main(){
ios_base::sync_with_stdio(0);
cin.tie(0);
int n, m; cin >> n >> m;
for(int i = 0; i < m; i++){
cin >> B[i] >> P[i];
residents[B[i]].pb(i);
}
fill(dis, dis+m, inf);
for(int x: residents[B[0]]) Q[0].pb(x);
for(int d = 0; d <= N; d++) for(int nd: Q[d]){
if(nd == 1){
cout << d << "\n";
exit(0);
}
if(bl[nd]) continue;
bl[nd] = 1;
for(int i = B[nd]+P[nd], dd = d+1; i < n; i+=P[nd], dd++) for(int x: residents[i]) if(dd < dis[x]){
dis[x] = dd;
Q[dd].pb(x);
}
for(int i = B[nd]-P[nd], dd = d+1; i >= 0; i-=P[nd], dd++) for(int x: residents[i]) if(dd < dis[x]){
dis[x] = dd;
Q[dd].pb(x);
}
}
cout << "-1\n";
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 2 |
Correct |
1 ms |
1620 KB |
Output is correct |
| 3 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 4 |
Correct |
1 ms |
1744 KB |
Output is correct |
| 5 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 6 |
Correct |
1 ms |
1744 KB |
Output is correct |
| 7 |
Correct |
1 ms |
1748 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 2 |
Correct |
1 ms |
1620 KB |
Output is correct |
| 3 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 4 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 5 |
Correct |
1 ms |
1740 KB |
Output is correct |
| 6 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 7 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 8 |
Correct |
1 ms |
1744 KB |
Output is correct |
| 9 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 10 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 11 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 12 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 13 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 14 |
Correct |
2 ms |
1864 KB |
Output is correct |
| 15 |
Correct |
2 ms |
1748 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 2 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 3 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 4 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 5 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 6 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 7 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 8 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 9 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 10 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 11 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 12 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 13 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 14 |
Correct |
2 ms |
1752 KB |
Output is correct |
| 15 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 16 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 17 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 18 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 19 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 20 |
Correct |
13 ms |
1920 KB |
Output is correct |
| 21 |
Correct |
2 ms |
1876 KB |
Output is correct |
| 22 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 23 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 24 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 25 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 26 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 27 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 28 |
Correct |
2 ms |
1876 KB |
Output is correct |
| 29 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 30 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 31 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 32 |
Correct |
2 ms |
1744 KB |
Output is correct |
| 33 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 34 |
Correct |
2 ms |
1748 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 2 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 3 |
Correct |
1 ms |
1744 KB |
Output is correct |
| 4 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 5 |
Correct |
2 ms |
1744 KB |
Output is correct |
| 6 |
Correct |
1 ms |
1740 KB |
Output is correct |
| 7 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 8 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 9 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 10 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 11 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 12 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 13 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 14 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 15 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 16 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 17 |
Correct |
2 ms |
1756 KB |
Output is correct |
| 18 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 19 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 20 |
Correct |
11 ms |
1876 KB |
Output is correct |
| 21 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 22 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 23 |
Correct |
2 ms |
1744 KB |
Output is correct |
| 24 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 25 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 26 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 27 |
Correct |
2 ms |
1756 KB |
Output is correct |
| 28 |
Correct |
2 ms |
1888 KB |
Output is correct |
| 29 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 30 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 31 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 32 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 33 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 34 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 35 |
Correct |
11 ms |
2772 KB |
Output is correct |
| 36 |
Correct |
3 ms |
1876 KB |
Output is correct |
| 37 |
Correct |
10 ms |
2652 KB |
Output is correct |
| 38 |
Correct |
12 ms |
3028 KB |
Output is correct |
| 39 |
Correct |
7 ms |
2644 KB |
Output is correct |
| 40 |
Correct |
9 ms |
2900 KB |
Output is correct |
| 41 |
Correct |
9 ms |
3028 KB |
Output is correct |
| 42 |
Correct |
5 ms |
2516 KB |
Output is correct |
| 43 |
Correct |
5 ms |
2648 KB |
Output is correct |
| 44 |
Correct |
215 ms |
2784 KB |
Output is correct |
| 45 |
Correct |
10 ms |
2952 KB |
Output is correct |
| 46 |
Correct |
10 ms |
2900 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
1620 KB |
Output is correct |
| 2 |
Correct |
1 ms |
1620 KB |
Output is correct |
| 3 |
Correct |
2 ms |
1744 KB |
Output is correct |
| 4 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 5 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 6 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 7 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 8 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 9 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 10 |
Correct |
1 ms |
1744 KB |
Output is correct |
| 11 |
Correct |
2 ms |
1876 KB |
Output is correct |
| 12 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 13 |
Correct |
2 ms |
1744 KB |
Output is correct |
| 14 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 15 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 16 |
Correct |
2 ms |
1752 KB |
Output is correct |
| 17 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 18 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 19 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 20 |
Correct |
12 ms |
1916 KB |
Output is correct |
| 21 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 22 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 23 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 24 |
Correct |
2 ms |
1752 KB |
Output is correct |
| 25 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 26 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 27 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 28 |
Correct |
2 ms |
1876 KB |
Output is correct |
| 29 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 30 |
Correct |
1 ms |
1740 KB |
Output is correct |
| 31 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 32 |
Correct |
1 ms |
1740 KB |
Output is correct |
| 33 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 34 |
Correct |
2 ms |
1752 KB |
Output is correct |
| 35 |
Correct |
10 ms |
2772 KB |
Output is correct |
| 36 |
Correct |
3 ms |
1940 KB |
Output is correct |
| 37 |
Correct |
9 ms |
2648 KB |
Output is correct |
| 38 |
Correct |
14 ms |
3036 KB |
Output is correct |
| 39 |
Correct |
7 ms |
2644 KB |
Output is correct |
| 40 |
Correct |
8 ms |
2912 KB |
Output is correct |
| 41 |
Correct |
9 ms |
3156 KB |
Output is correct |
| 42 |
Correct |
6 ms |
2508 KB |
Output is correct |
| 43 |
Correct |
5 ms |
2644 KB |
Output is correct |
| 44 |
Correct |
211 ms |
2772 KB |
Output is correct |
| 45 |
Correct |
11 ms |
2904 KB |
Output is correct |
| 46 |
Correct |
12 ms |
2900 KB |
Output is correct |
| 47 |
Correct |
16 ms |
3148 KB |
Output is correct |
| 48 |
Correct |
6 ms |
2644 KB |
Output is correct |
| 49 |
Correct |
10 ms |
2648 KB |
Output is correct |
| 50 |
Correct |
5 ms |
2388 KB |
Output is correct |
| 51 |
Correct |
15 ms |
3840 KB |
Output is correct |
| 52 |
Correct |
17 ms |
3608 KB |
Output is correct |
| 53 |
Correct |
9 ms |
3312 KB |
Output is correct |
| 54 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 55 |
Correct |
1 ms |
1744 KB |
Output is correct |
| 56 |
Execution timed out |
1075 ms |
4176 KB |
Time limit exceeded |
| 57 |
Halted |
0 ms |
0 KB |
- |
