#include <cstdio>
#include <queue>
#include <algorithm>
#include <cstring>
using namespace std;
typedef pair<int,int> pp;
int N,M;
int a[30010],P[30010];
int dist[30010];
bool chk[30010];
priority_queue<pp,vector<pp>,greater<pp> > Q;
int main(){
scanf("%d%d",&N,&M);
for(int i=0;i<M;i++){
scanf("%d%d",&a[i],&P[i]);
}
memset(dist,0x3f,sizeof(dist));
int INF=dist[0];
dist[0]=0;
Q.push(pp(0,0));
int v;
while(!Q.empty()){
do{
v=Q.top().second;Q.pop();
}while(!Q.empty()&&chk[v]);
chk[v]=1;
if(v==1)break;
for(int i=0;i<M;i++){
if(abs(a[v]-a[i])%P[v]==0){
if(dist[i]>dist[v]+abs(a[v]-a[i])/P[v]){
dist[i]=dist[v]+abs(a[v]-a[i])/P[v];
Q.push(pp(dist[i],i));
}
}
}
}
if(dist[1]==INF){
puts("-1");
}else{
printf("%d",dist[1]);
}
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 2 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 3 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 4 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 5 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 6 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 7 |
Correct |
0 ms |
1592 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 2 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 3 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 4 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 5 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 6 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 7 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 8 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 9 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 10 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 11 |
Correct |
1 ms |
1592 KB |
Output is correct |
| 12 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 13 |
Correct |
25 ms |
1592 KB |
Output is correct |
| 14 |
Correct |
26 ms |
1592 KB |
Output is correct |
| 15 |
Correct |
26 ms |
1592 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 2 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 3 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 4 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 5 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 6 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 7 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 8 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 9 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 10 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 11 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 12 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 13 |
Correct |
25 ms |
1592 KB |
Output is correct |
| 14 |
Correct |
26 ms |
1592 KB |
Output is correct |
| 15 |
Correct |
26 ms |
1592 KB |
Output is correct |
| 16 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 17 |
Correct |
13 ms |
1592 KB |
Output is correct |
| 18 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 19 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 20 |
Correct |
25 ms |
1592 KB |
Output is correct |
| 21 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 22 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 23 |
Correct |
5 ms |
1592 KB |
Output is correct |
| 24 |
Correct |
20 ms |
1592 KB |
Output is correct |
| 25 |
Correct |
4 ms |
1592 KB |
Output is correct |
| 26 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 27 |
Correct |
2 ms |
1592 KB |
Output is correct |
| 28 |
Correct |
25 ms |
1592 KB |
Output is correct |
| 29 |
Correct |
4 ms |
1592 KB |
Output is correct |
| 30 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 31 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 32 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 33 |
Correct |
26 ms |
1592 KB |
Output is correct |
| 34 |
Correct |
26 ms |
1592 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 2 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 3 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 4 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 5 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 6 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 7 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 8 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 9 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 10 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 11 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 12 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 13 |
Correct |
25 ms |
1592 KB |
Output is correct |
| 14 |
Correct |
26 ms |
1592 KB |
Output is correct |
| 15 |
Correct |
26 ms |
1592 KB |
Output is correct |
| 16 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 17 |
Correct |
13 ms |
1592 KB |
Output is correct |
| 18 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 19 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 20 |
Correct |
25 ms |
1592 KB |
Output is correct |
| 21 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 22 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 23 |
Correct |
5 ms |
1592 KB |
Output is correct |
| 24 |
Correct |
20 ms |
1592 KB |
Output is correct |
| 25 |
Correct |
5 ms |
1592 KB |
Output is correct |
| 26 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 27 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 28 |
Correct |
25 ms |
1592 KB |
Output is correct |
| 29 |
Correct |
4 ms |
1592 KB |
Output is correct |
| 30 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 31 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 32 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 33 |
Correct |
26 ms |
1592 KB |
Output is correct |
| 34 |
Correct |
26 ms |
1592 KB |
Output is correct |
| 35 |
Execution timed out |
1000 ms |
2364 KB |
Program timed out |
| 36 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 2 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 3 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 4 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 5 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 6 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 7 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 8 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 9 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 10 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 11 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 12 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 13 |
Correct |
25 ms |
1592 KB |
Output is correct |
| 14 |
Correct |
26 ms |
1592 KB |
Output is correct |
| 15 |
Correct |
26 ms |
1592 KB |
Output is correct |
| 16 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 17 |
Correct |
12 ms |
1592 KB |
Output is correct |
| 18 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 19 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 20 |
Correct |
25 ms |
1592 KB |
Output is correct |
| 21 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 22 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 23 |
Correct |
3 ms |
1592 KB |
Output is correct |
| 24 |
Correct |
20 ms |
1592 KB |
Output is correct |
| 25 |
Correct |
4 ms |
1592 KB |
Output is correct |
| 26 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 27 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 28 |
Correct |
21 ms |
1592 KB |
Output is correct |
| 29 |
Correct |
4 ms |
1592 KB |
Output is correct |
| 30 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 31 |
Correct |
0 ms |
1592 KB |
Output is correct |
| 32 |
Correct |
2 ms |
1592 KB |
Output is correct |
| 33 |
Correct |
26 ms |
1592 KB |
Output is correct |
| 34 |
Correct |
26 ms |
1592 KB |
Output is correct |
| 35 |
Execution timed out |
1000 ms |
2364 KB |
Program timed out |
| 36 |
Halted |
0 ms |
0 KB |
- |
