#include<bits/stdc++.h>
using namespace std;
const int inf = 2e9;
int main()
{
ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
int n, m;
cin >> n >> m;
pair<int, int> a[m];
for(int i = 0; i < m; i++)
{
cin >> a[i].first >> a[i].second;
}
int s = a[0].first, t = a[1].first, adj[n];
fill(adj, adj+n, m);
sort(a, a+m);
for(int i = 0; i < m; i++)
{
if(!i)
{
adj[a[i].first] = i;
}
else if(a[i].first != a[i-1].first)
{
adj[a[i].first] = i;
}
}
int d[n];
fill(d, d+n, inf);
priority_queue<pair<int, int>> pq;
pq.push({d[s]=0, s});
while(pq.size())
{
int v = pq.top().second;
pq.pop();
for(int i = adj[v]; ((i < m)&&(a[i].first == v)); i++)
{
int j = a[i].second, x = 0;
while((v+(x*j) < n) || (v-(x*j) >= 0))
{
if((v+(x*j) < n) && (d[v+(x*j)] > d[v]+x))
{
pq.push({d[v+(x*j)] = d[v]+x, v+(x*j)});
}
if((v-(x*j) >= 0) && (d[v-(x*j)] > d[v]+x))
{
pq.push({d[v-(x*j)] = d[v]+x, v-(x*j)});
}
x++;
}
}
}
if(d[t] != inf)
{
cout << d[t] << '\n';
}
else
{
cout << "-1\n";
}
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
604 KB |
Output is correct |
| 2 |
Correct |
1 ms |
344 KB |
Output is correct |
| 3 |
Correct |
1 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
456 KB |
Output is correct |
| 5 |
Correct |
0 ms |
348 KB |
Output is correct |
| 6 |
Correct |
1 ms |
344 KB |
Output is correct |
| 7 |
Correct |
1 ms |
348 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
600 KB |
Output is correct |
| 2 |
Correct |
0 ms |
408 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
456 KB |
Output is correct |
| 5 |
Correct |
0 ms |
460 KB |
Output is correct |
| 6 |
Correct |
0 ms |
348 KB |
Output is correct |
| 7 |
Correct |
0 ms |
344 KB |
Output is correct |
| 8 |
Correct |
0 ms |
456 KB |
Output is correct |
| 9 |
Correct |
0 ms |
348 KB |
Output is correct |
| 10 |
Correct |
1 ms |
348 KB |
Output is correct |
| 11 |
Correct |
1 ms |
412 KB |
Output is correct |
| 12 |
Correct |
1 ms |
484 KB |
Output is correct |
| 13 |
Correct |
1 ms |
464 KB |
Output is correct |
| 14 |
Correct |
1 ms |
348 KB |
Output is correct |
| 15 |
Correct |
1 ms |
348 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
344 KB |
Output is correct |
| 2 |
Correct |
0 ms |
460 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
344 KB |
Output is correct |
| 5 |
Correct |
0 ms |
348 KB |
Output is correct |
| 6 |
Correct |
0 ms |
348 KB |
Output is correct |
| 7 |
Correct |
0 ms |
348 KB |
Output is correct |
| 8 |
Correct |
0 ms |
348 KB |
Output is correct |
| 9 |
Correct |
0 ms |
348 KB |
Output is correct |
| 10 |
Correct |
1 ms |
452 KB |
Output is correct |
| 11 |
Correct |
1 ms |
348 KB |
Output is correct |
| 12 |
Correct |
1 ms |
348 KB |
Output is correct |
| 13 |
Correct |
1 ms |
348 KB |
Output is correct |
| 14 |
Correct |
1 ms |
460 KB |
Output is correct |
| 15 |
Correct |
1 ms |
348 KB |
Output is correct |
| 16 |
Correct |
1 ms |
344 KB |
Output is correct |
| 17 |
Correct |
20 ms |
348 KB |
Output is correct |
| 18 |
Correct |
0 ms |
348 KB |
Output is correct |
| 19 |
Correct |
0 ms |
348 KB |
Output is correct |
| 20 |
Correct |
4 ms |
348 KB |
Output is correct |
| 21 |
Correct |
0 ms |
348 KB |
Output is correct |
| 22 |
Correct |
0 ms |
348 KB |
Output is correct |
| 23 |
Correct |
4 ms |
348 KB |
Output is correct |
| 24 |
Correct |
26 ms |
348 KB |
Output is correct |
| 25 |
Correct |
4 ms |
348 KB |
Output is correct |
| 26 |
Correct |
5 ms |
572 KB |
Output is correct |
| 27 |
Correct |
4 ms |
344 KB |
Output is correct |
| 28 |
Correct |
1 ms |
344 KB |
Output is correct |
| 29 |
Correct |
2 ms |
532 KB |
Output is correct |
| 30 |
Correct |
1 ms |
348 KB |
Output is correct |
| 31 |
Correct |
1 ms |
528 KB |
Output is correct |
| 32 |
Correct |
1 ms |
456 KB |
Output is correct |
| 33 |
Correct |
2 ms |
604 KB |
Output is correct |
| 34 |
Correct |
2 ms |
604 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
348 KB |
Output is correct |
| 2 |
Correct |
1 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
348 KB |
Output is correct |
| 5 |
Correct |
0 ms |
348 KB |
Output is correct |
| 6 |
Correct |
0 ms |
344 KB |
Output is correct |
| 7 |
Correct |
0 ms |
348 KB |
Output is correct |
| 8 |
Correct |
0 ms |
348 KB |
Output is correct |
| 9 |
Correct |
0 ms |
348 KB |
Output is correct |
| 10 |
Correct |
1 ms |
348 KB |
Output is correct |
| 11 |
Correct |
1 ms |
348 KB |
Output is correct |
| 12 |
Correct |
1 ms |
348 KB |
Output is correct |
| 13 |
Correct |
1 ms |
348 KB |
Output is correct |
| 14 |
Correct |
1 ms |
348 KB |
Output is correct |
| 15 |
Correct |
1 ms |
348 KB |
Output is correct |
| 16 |
Correct |
1 ms |
348 KB |
Output is correct |
| 17 |
Correct |
22 ms |
348 KB |
Output is correct |
| 18 |
Correct |
0 ms |
344 KB |
Output is correct |
| 19 |
Correct |
0 ms |
348 KB |
Output is correct |
| 20 |
Correct |
4 ms |
348 KB |
Output is correct |
| 21 |
Correct |
0 ms |
348 KB |
Output is correct |
| 22 |
Correct |
0 ms |
344 KB |
Output is correct |
| 23 |
Correct |
4 ms |
348 KB |
Output is correct |
| 24 |
Correct |
26 ms |
504 KB |
Output is correct |
| 25 |
Correct |
3 ms |
344 KB |
Output is correct |
| 26 |
Correct |
4 ms |
348 KB |
Output is correct |
| 27 |
Correct |
4 ms |
532 KB |
Output is correct |
| 28 |
Correct |
1 ms |
348 KB |
Output is correct |
| 29 |
Correct |
1 ms |
600 KB |
Output is correct |
| 30 |
Correct |
1 ms |
348 KB |
Output is correct |
| 31 |
Correct |
1 ms |
532 KB |
Output is correct |
| 32 |
Correct |
1 ms |
348 KB |
Output is correct |
| 33 |
Correct |
2 ms |
604 KB |
Output is correct |
| 34 |
Correct |
2 ms |
604 KB |
Output is correct |
| 35 |
Correct |
155 ms |
900 KB |
Output is correct |
| 36 |
Correct |
34 ms |
344 KB |
Output is correct |
| 37 |
Correct |
88 ms |
984 KB |
Output is correct |
| 38 |
Correct |
319 ms |
1008 KB |
Output is correct |
| 39 |
Correct |
297 ms |
1104 KB |
Output is correct |
| 40 |
Correct |
191 ms |
1104 KB |
Output is correct |
| 41 |
Correct |
37 ms |
944 KB |
Output is correct |
| 42 |
Correct |
61 ms |
980 KB |
Output is correct |
| 43 |
Correct |
55 ms |
860 KB |
Output is correct |
| 44 |
Correct |
59 ms |
912 KB |
Output is correct |
| 45 |
Correct |
10 ms |
1112 KB |
Output is correct |
| 46 |
Correct |
10 ms |
1116 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
348 KB |
Output is correct |
| 2 |
Correct |
0 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
600 KB |
Output is correct |
| 4 |
Correct |
0 ms |
348 KB |
Output is correct |
| 5 |
Correct |
0 ms |
348 KB |
Output is correct |
| 6 |
Correct |
0 ms |
348 KB |
Output is correct |
| 7 |
Correct |
0 ms |
348 KB |
Output is correct |
| 8 |
Correct |
0 ms |
456 KB |
Output is correct |
| 9 |
Correct |
1 ms |
536 KB |
Output is correct |
| 10 |
Correct |
1 ms |
348 KB |
Output is correct |
| 11 |
Correct |
1 ms |
348 KB |
Output is correct |
| 12 |
Correct |
1 ms |
348 KB |
Output is correct |
| 13 |
Correct |
1 ms |
348 KB |
Output is correct |
| 14 |
Correct |
1 ms |
348 KB |
Output is correct |
| 15 |
Correct |
1 ms |
348 KB |
Output is correct |
| 16 |
Correct |
0 ms |
348 KB |
Output is correct |
| 17 |
Correct |
19 ms |
504 KB |
Output is correct |
| 18 |
Correct |
0 ms |
348 KB |
Output is correct |
| 19 |
Correct |
0 ms |
348 KB |
Output is correct |
| 20 |
Correct |
4 ms |
344 KB |
Output is correct |
| 21 |
Correct |
1 ms |
348 KB |
Output is correct |
| 22 |
Correct |
0 ms |
348 KB |
Output is correct |
| 23 |
Correct |
4 ms |
348 KB |
Output is correct |
| 24 |
Correct |
28 ms |
468 KB |
Output is correct |
| 25 |
Correct |
3 ms |
344 KB |
Output is correct |
| 26 |
Correct |
4 ms |
348 KB |
Output is correct |
| 27 |
Correct |
4 ms |
348 KB |
Output is correct |
| 28 |
Correct |
1 ms |
464 KB |
Output is correct |
| 29 |
Correct |
1 ms |
348 KB |
Output is correct |
| 30 |
Correct |
1 ms |
348 KB |
Output is correct |
| 31 |
Correct |
1 ms |
348 KB |
Output is correct |
| 32 |
Correct |
1 ms |
348 KB |
Output is correct |
| 33 |
Correct |
2 ms |
604 KB |
Output is correct |
| 34 |
Correct |
2 ms |
856 KB |
Output is correct |
| 35 |
Correct |
157 ms |
860 KB |
Output is correct |
| 36 |
Correct |
30 ms |
600 KB |
Output is correct |
| 37 |
Correct |
90 ms |
848 KB |
Output is correct |
| 38 |
Correct |
292 ms |
1108 KB |
Output is correct |
| 39 |
Correct |
286 ms |
856 KB |
Output is correct |
| 40 |
Correct |
197 ms |
1108 KB |
Output is correct |
| 41 |
Correct |
38 ms |
1104 KB |
Output is correct |
| 42 |
Correct |
59 ms |
860 KB |
Output is correct |
| 43 |
Correct |
56 ms |
920 KB |
Output is correct |
| 44 |
Correct |
62 ms |
860 KB |
Output is correct |
| 45 |
Correct |
10 ms |
1116 KB |
Output is correct |
| 46 |
Correct |
10 ms |
980 KB |
Output is correct |
| 47 |
Execution timed out |
1032 ms |
1112 KB |
Time limit exceeded |
| 48 |
Halted |
0 ms |
0 KB |
- |
