#include <bits/stdc++.h>
using namespace std;
int num_buildings, num_dogs, target;
int dis[30000];
unordered_set<int> buildings[30000];
int main(int argc, const char * argv[]) {
int start = 0;
cin>>num_buildings>>num_dogs;
for(int i=0; i<num_dogs; i++){
int b, p; cin>>b>>p;
buildings[b].insert(p);
if(i == 0)
start = b;
if(i == 1)
target = b;
}
memset(dis,0x3f,sizeof dis); dis[start] = 0;
priority_queue<pair<int,int>,vector<pair<int,int>>,greater<pair<int,int>>> q;
q.push({0,start});
while(!q.empty()){
int current_building = q.top().second; q.pop();
if(current_building == target)
continue;
for(int check:buildings[current_building]){
for(int i=1; i*check+current_building<num_buildings; i++){
int next_building = i*check+current_building;
if(dis[next_building] > dis[current_building]+i){
dis[next_building] = dis[current_building]+i;
q.push({dis[next_building],next_building});
if(binary_search(buildings[next_building].begin(),buildings[next_building].end(),check))
break;
}
}
for(int i=1; current_building-i*check>=0; i++){
int next_building = current_building-i*check;
if(dis[next_building] > dis[current_building]+i){
dis[next_building] = dis[current_building]+i;
q.push({dis[next_building],next_building});
if(binary_search(buildings[next_building].begin(),buildings[next_building].end(),check))
break;
}
}
}
}
cout<<(dis[target]==0x3f3f3f3f?-1:dis[target]);
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
4 ms |
2040 KB |
Output is correct |
| 2 |
Correct |
5 ms |
2176 KB |
Output is correct |
| 3 |
Correct |
5 ms |
2256 KB |
Output is correct |
| 4 |
Correct |
5 ms |
2256 KB |
Output is correct |
| 5 |
Correct |
6 ms |
2312 KB |
Output is correct |
| 6 |
Correct |
5 ms |
2312 KB |
Output is correct |
| 7 |
Correct |
6 ms |
2312 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
5 ms |
2320 KB |
Output is correct |
| 2 |
Correct |
5 ms |
2320 KB |
Output is correct |
| 3 |
Correct |
4 ms |
2376 KB |
Output is correct |
| 4 |
Correct |
4 ms |
2376 KB |
Output is correct |
| 5 |
Correct |
5 ms |
2376 KB |
Output is correct |
| 6 |
Correct |
5 ms |
2376 KB |
Output is correct |
| 7 |
Correct |
5 ms |
2376 KB |
Output is correct |
| 8 |
Correct |
6 ms |
2376 KB |
Output is correct |
| 9 |
Correct |
5 ms |
2488 KB |
Output is correct |
| 10 |
Correct |
5 ms |
2488 KB |
Output is correct |
| 11 |
Correct |
6 ms |
2504 KB |
Output is correct |
| 12 |
Correct |
5 ms |
2504 KB |
Output is correct |
| 13 |
Correct |
5 ms |
2504 KB |
Output is correct |
| 14 |
Correct |
7 ms |
2568 KB |
Output is correct |
| 15 |
Correct |
6 ms |
2580 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
4 ms |
2580 KB |
Output is correct |
| 2 |
Correct |
5 ms |
2580 KB |
Output is correct |
| 3 |
Correct |
5 ms |
2580 KB |
Output is correct |
| 4 |
Correct |
4 ms |
2580 KB |
Output is correct |
| 5 |
Correct |
4 ms |
2580 KB |
Output is correct |
| 6 |
Correct |
5 ms |
2612 KB |
Output is correct |
| 7 |
Correct |
5 ms |
2612 KB |
Output is correct |
| 8 |
Correct |
5 ms |
2612 KB |
Output is correct |
| 9 |
Correct |
5 ms |
2612 KB |
Output is correct |
| 10 |
Correct |
7 ms |
2612 KB |
Output is correct |
| 11 |
Correct |
8 ms |
2632 KB |
Output is correct |
| 12 |
Correct |
7 ms |
2632 KB |
Output is correct |
| 13 |
Correct |
5 ms |
2632 KB |
Output is correct |
| 14 |
Correct |
6 ms |
2684 KB |
Output is correct |
| 15 |
Correct |
7 ms |
2696 KB |
Output is correct |
| 16 |
Correct |
6 ms |
2696 KB |
Output is correct |
| 17 |
Correct |
6 ms |
2776 KB |
Output is correct |
| 18 |
Correct |
5 ms |
2776 KB |
Output is correct |
| 19 |
Correct |
6 ms |
2776 KB |
Output is correct |
| 20 |
Correct |
13 ms |
2776 KB |
Output is correct |
| 21 |
Correct |
6 ms |
2784 KB |
Output is correct |
| 22 |
Correct |
6 ms |
2796 KB |
Output is correct |
| 23 |
Correct |
7 ms |
2796 KB |
Output is correct |
| 24 |
Correct |
7 ms |
2816 KB |
Output is correct |
| 25 |
Correct |
7 ms |
2836 KB |
Output is correct |
| 26 |
Correct |
8 ms |
2836 KB |
Output is correct |
| 27 |
Correct |
6 ms |
2856 KB |
Output is correct |
| 28 |
Correct |
7 ms |
2872 KB |
Output is correct |
| 29 |
Correct |
9 ms |
3044 KB |
Output is correct |
| 30 |
Correct |
5 ms |
3044 KB |
Output is correct |
| 31 |
Correct |
7 ms |
3044 KB |
Output is correct |
| 32 |
Correct |
6 ms |
3044 KB |
Output is correct |
| 33 |
Correct |
10 ms |
3160 KB |
Output is correct |
| 34 |
Correct |
9 ms |
3196 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
4 ms |
3196 KB |
Output is correct |
| 2 |
Correct |
6 ms |
3196 KB |
Output is correct |
| 3 |
Correct |
5 ms |
3196 KB |
Output is correct |
| 4 |
Correct |
5 ms |
3196 KB |
Output is correct |
| 5 |
Correct |
5 ms |
3196 KB |
Output is correct |
| 6 |
Correct |
11 ms |
3196 KB |
Output is correct |
| 7 |
Correct |
5 ms |
3196 KB |
Output is correct |
| 8 |
Correct |
4 ms |
3196 KB |
Output is correct |
| 9 |
Correct |
5 ms |
3196 KB |
Output is correct |
| 10 |
Correct |
5 ms |
3196 KB |
Output is correct |
| 11 |
Correct |
7 ms |
3196 KB |
Output is correct |
| 12 |
Correct |
6 ms |
3196 KB |
Output is correct |
| 13 |
Correct |
7 ms |
3196 KB |
Output is correct |
| 14 |
Correct |
6 ms |
3196 KB |
Output is correct |
| 15 |
Correct |
6 ms |
3196 KB |
Output is correct |
| 16 |
Correct |
6 ms |
3196 KB |
Output is correct |
| 17 |
Correct |
8 ms |
3196 KB |
Output is correct |
| 18 |
Correct |
6 ms |
3196 KB |
Output is correct |
| 19 |
Correct |
5 ms |
3196 KB |
Output is correct |
| 20 |
Correct |
21 ms |
3196 KB |
Output is correct |
| 21 |
Correct |
6 ms |
3196 KB |
Output is correct |
| 22 |
Correct |
6 ms |
3196 KB |
Output is correct |
| 23 |
Correct |
7 ms |
3196 KB |
Output is correct |
| 24 |
Correct |
7 ms |
3252 KB |
Output is correct |
| 25 |
Correct |
8 ms |
3252 KB |
Output is correct |
| 26 |
Correct |
7 ms |
3252 KB |
Output is correct |
| 27 |
Correct |
8 ms |
3252 KB |
Output is correct |
| 28 |
Correct |
9 ms |
3252 KB |
Output is correct |
| 29 |
Correct |
8 ms |
3396 KB |
Output is correct |
| 30 |
Correct |
7 ms |
3396 KB |
Output is correct |
| 31 |
Correct |
19 ms |
3396 KB |
Output is correct |
| 32 |
Correct |
7 ms |
3396 KB |
Output is correct |
| 33 |
Correct |
10 ms |
3576 KB |
Output is correct |
| 34 |
Correct |
9 ms |
3576 KB |
Output is correct |
| 35 |
Correct |
45 ms |
4636 KB |
Output is correct |
| 36 |
Correct |
9 ms |
4636 KB |
Output is correct |
| 37 |
Correct |
30 ms |
4636 KB |
Output is correct |
| 38 |
Correct |
41 ms |
5244 KB |
Output is correct |
| 39 |
Correct |
42 ms |
5508 KB |
Output is correct |
| 40 |
Correct |
46 ms |
5772 KB |
Output is correct |
| 41 |
Correct |
43 ms |
6040 KB |
Output is correct |
| 42 |
Correct |
23 ms |
6040 KB |
Output is correct |
| 43 |
Correct |
22 ms |
6040 KB |
Output is correct |
| 44 |
Correct |
30 ms |
6040 KB |
Output is correct |
| 45 |
Correct |
39 ms |
6924 KB |
Output is correct |
| 46 |
Correct |
62 ms |
7328 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
6 ms |
7328 KB |
Output is correct |
| 2 |
Correct |
4 ms |
7328 KB |
Output is correct |
| 3 |
Correct |
6 ms |
7328 KB |
Output is correct |
| 4 |
Correct |
6 ms |
7328 KB |
Output is correct |
| 5 |
Correct |
5 ms |
7328 KB |
Output is correct |
| 6 |
Correct |
4 ms |
7328 KB |
Output is correct |
| 7 |
Correct |
5 ms |
7328 KB |
Output is correct |
| 8 |
Correct |
4 ms |
7328 KB |
Output is correct |
| 9 |
Correct |
5 ms |
7328 KB |
Output is correct |
| 10 |
Correct |
7 ms |
7328 KB |
Output is correct |
| 11 |
Correct |
8 ms |
7328 KB |
Output is correct |
| 12 |
Correct |
8 ms |
7328 KB |
Output is correct |
| 13 |
Correct |
7 ms |
7328 KB |
Output is correct |
| 14 |
Correct |
6 ms |
7328 KB |
Output is correct |
| 15 |
Correct |
7 ms |
7328 KB |
Output is correct |
| 16 |
Correct |
6 ms |
7328 KB |
Output is correct |
| 17 |
Correct |
7 ms |
7328 KB |
Output is correct |
| 18 |
Correct |
9 ms |
7328 KB |
Output is correct |
| 19 |
Correct |
6 ms |
7328 KB |
Output is correct |
| 20 |
Correct |
12 ms |
7328 KB |
Output is correct |
| 21 |
Correct |
5 ms |
7328 KB |
Output is correct |
| 22 |
Correct |
5 ms |
7328 KB |
Output is correct |
| 23 |
Correct |
6 ms |
7328 KB |
Output is correct |
| 24 |
Correct |
9 ms |
7328 KB |
Output is correct |
| 25 |
Correct |
7 ms |
7328 KB |
Output is correct |
| 26 |
Correct |
7 ms |
7328 KB |
Output is correct |
| 27 |
Correct |
7 ms |
7328 KB |
Output is correct |
| 28 |
Correct |
7 ms |
7328 KB |
Output is correct |
| 29 |
Correct |
7 ms |
7328 KB |
Output is correct |
| 30 |
Correct |
6 ms |
7328 KB |
Output is correct |
| 31 |
Correct |
7 ms |
7328 KB |
Output is correct |
| 32 |
Correct |
8 ms |
7328 KB |
Output is correct |
| 33 |
Correct |
9 ms |
7328 KB |
Output is correct |
| 34 |
Correct |
8 ms |
7328 KB |
Output is correct |
| 35 |
Correct |
44 ms |
7428 KB |
Output is correct |
| 36 |
Correct |
13 ms |
7428 KB |
Output is correct |
| 37 |
Correct |
29 ms |
7448 KB |
Output is correct |
| 38 |
Correct |
64 ms |
8248 KB |
Output is correct |
| 39 |
Correct |
48 ms |
8512 KB |
Output is correct |
| 40 |
Correct |
43 ms |
8836 KB |
Output is correct |
| 41 |
Correct |
70 ms |
9032 KB |
Output is correct |
| 42 |
Correct |
40 ms |
9032 KB |
Output is correct |
| 43 |
Correct |
24 ms |
9032 KB |
Output is correct |
| 44 |
Correct |
27 ms |
9032 KB |
Output is correct |
| 45 |
Correct |
67 ms |
9932 KB |
Output is correct |
| 46 |
Correct |
52 ms |
10208 KB |
Output is correct |
| 47 |
Correct |
79 ms |
10736 KB |
Output is correct |
| 48 |
Correct |
37 ms |
10736 KB |
Output is correct |
| 49 |
Correct |
32 ms |
10736 KB |
Output is correct |
| 50 |
Correct |
27 ms |
10736 KB |
Output is correct |
| 51 |
Correct |
113 ms |
12092 KB |
Output is correct |
| 52 |
Correct |
95 ms |
12324 KB |
Output is correct |
| 53 |
Correct |
50 ms |
12324 KB |
Output is correct |
| 54 |
Correct |
7 ms |
12324 KB |
Output is correct |
| 55 |
Correct |
7 ms |
12324 KB |
Output is correct |
| 56 |
Correct |
767 ms |
12648 KB |
Output is correct |
| 57 |
Correct |
151 ms |
13108 KB |
Output is correct |
| 58 |
Correct |
27 ms |
13108 KB |
Output is correct |
| 59 |
Correct |
26 ms |
13108 KB |
Output is correct |
| 60 |
Correct |
37 ms |
13108 KB |
Output is correct |
| 61 |
Correct |
28 ms |
13108 KB |
Output is correct |
| 62 |
Correct |
54 ms |
13832 KB |
Output is correct |
| 63 |
Correct |
94 ms |
14548 KB |
Output is correct |
| 64 |
Correct |
80 ms |
14908 KB |
Output is correct |
| 65 |
Correct |
105 ms |
16032 KB |
Output is correct |
| 66 |
Correct |
224 ms |
16308 KB |
Output is correct |
| 67 |
Correct |
131 ms |
16468 KB |
Output is correct |
