#include <bits/stdc++.h>
using namespace std;
int n, m, dist[30002], poz;
set<int>s[30002];
bool viz[30002];
int main()
{
cin >> n >> m;
priority_queue<pair<int, int>, vector<pair<int, int>>, greater<pair<int, int> > > q;
for (int i = 0; i < m; i++) {
int b, p;
cin >> b >> p;
if (i == 1)
poz = b;
s[b].insert(p);
if (i == 0)
q.push({0, b});
}
for (int i = 0; i < n; i++)
dist[i] = 1e9;
dist[q.top().second] = 0;
while (!q.empty()) {
auto x = q.top();
q.pop();
if (dist[x.second] != x.first)
continue;
if (x.second == poz)
break;
for (auto it : s[x.second]) {
for (int i = x.second+it; i < n; i += it) {
if (s[i].size() && dist[i] > dist[x.second] + (i - x.second) / it) {
dist[i] = dist[x.second] + (i - x.second) / it;
q.push({dist[i], i});
}
if (s[i].count(it))
break;
}
for (int i = x.second-it; i >= 0; i -= it) {
if (s[i].size() && dist[i] > dist[x.second] + (x.second - i) / it) {
dist[i] = dist[x.second] + (x.second - i) / it;
q.push({dist[i], i});
}
if (s[i].count(it))
break;
}
}
}
if (dist[poz] == 1e9)
dist[poz] = -1;
cout << dist[poz];
return 0;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
1772 KB |
Output is correct |
| 2 |
Correct |
1 ms |
1772 KB |
Output is correct |
| 3 |
Correct |
1 ms |
1772 KB |
Output is correct |
| 4 |
Correct |
1 ms |
1772 KB |
Output is correct |
| 5 |
Correct |
1 ms |
1772 KB |
Output is correct |
| 6 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 7 |
Correct |
1 ms |
1772 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
1772 KB |
Output is correct |
| 2 |
Correct |
1 ms |
1772 KB |
Output is correct |
| 3 |
Correct |
1 ms |
1772 KB |
Output is correct |
| 4 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 5 |
Correct |
1 ms |
1772 KB |
Output is correct |
| 6 |
Correct |
1 ms |
1772 KB |
Output is correct |
| 7 |
Correct |
1 ms |
1772 KB |
Output is correct |
| 8 |
Correct |
1 ms |
1772 KB |
Output is correct |
| 9 |
Correct |
1 ms |
1772 KB |
Output is correct |
| 10 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 11 |
Correct |
3 ms |
1772 KB |
Output is correct |
| 12 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 13 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 14 |
Correct |
3 ms |
1772 KB |
Output is correct |
| 15 |
Correct |
3 ms |
1772 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
1772 KB |
Output is correct |
| 2 |
Correct |
1 ms |
1772 KB |
Output is correct |
| 3 |
Correct |
1 ms |
1772 KB |
Output is correct |
| 4 |
Correct |
1 ms |
1772 KB |
Output is correct |
| 5 |
Correct |
1 ms |
1772 KB |
Output is correct |
| 6 |
Correct |
1 ms |
1772 KB |
Output is correct |
| 7 |
Correct |
1 ms |
1772 KB |
Output is correct |
| 8 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 9 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 10 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 11 |
Correct |
2 ms |
1792 KB |
Output is correct |
| 12 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 13 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 14 |
Correct |
3 ms |
1772 KB |
Output is correct |
| 15 |
Correct |
3 ms |
1772 KB |
Output is correct |
| 16 |
Correct |
2 ms |
1920 KB |
Output is correct |
| 17 |
Correct |
3 ms |
1900 KB |
Output is correct |
| 18 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 19 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 20 |
Correct |
3 ms |
1772 KB |
Output is correct |
| 21 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 22 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 23 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 24 |
Correct |
3 ms |
1900 KB |
Output is correct |
| 25 |
Correct |
3 ms |
1900 KB |
Output is correct |
| 26 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 27 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 28 |
Correct |
3 ms |
1772 KB |
Output is correct |
| 29 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 30 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 31 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 32 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 33 |
Correct |
3 ms |
1900 KB |
Output is correct |
| 34 |
Correct |
3 ms |
1900 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
1772 KB |
Output is correct |
| 2 |
Correct |
1 ms |
1772 KB |
Output is correct |
| 3 |
Correct |
1 ms |
1772 KB |
Output is correct |
| 4 |
Correct |
1 ms |
1772 KB |
Output is correct |
| 5 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 6 |
Correct |
2 ms |
1920 KB |
Output is correct |
| 7 |
Correct |
1 ms |
1772 KB |
Output is correct |
| 8 |
Correct |
1 ms |
1772 KB |
Output is correct |
| 9 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 10 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 11 |
Correct |
3 ms |
1772 KB |
Output is correct |
| 12 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 13 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 14 |
Correct |
3 ms |
1772 KB |
Output is correct |
| 15 |
Correct |
3 ms |
1772 KB |
Output is correct |
| 16 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 17 |
Correct |
3 ms |
1900 KB |
Output is correct |
| 18 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 19 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 20 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 21 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 22 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 23 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 24 |
Correct |
3 ms |
1900 KB |
Output is correct |
| 25 |
Correct |
3 ms |
1900 KB |
Output is correct |
| 26 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 27 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 28 |
Correct |
3 ms |
1772 KB |
Output is correct |
| 29 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 30 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 31 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 32 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 33 |
Correct |
3 ms |
1900 KB |
Output is correct |
| 34 |
Correct |
3 ms |
1900 KB |
Output is correct |
| 35 |
Correct |
22 ms |
3052 KB |
Output is correct |
| 36 |
Correct |
5 ms |
2028 KB |
Output is correct |
| 37 |
Correct |
18 ms |
2796 KB |
Output is correct |
| 38 |
Correct |
24 ms |
3180 KB |
Output is correct |
| 39 |
Correct |
21 ms |
3180 KB |
Output is correct |
| 40 |
Correct |
23 ms |
3180 KB |
Output is correct |
| 41 |
Correct |
29 ms |
3308 KB |
Output is correct |
| 42 |
Correct |
14 ms |
1772 KB |
Output is correct |
| 43 |
Correct |
15 ms |
1792 KB |
Output is correct |
| 44 |
Correct |
15 ms |
1772 KB |
Output is correct |
| 45 |
Correct |
25 ms |
3180 KB |
Output is correct |
| 46 |
Correct |
25 ms |
3180 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
1772 KB |
Output is correct |
| 2 |
Correct |
1 ms |
1772 KB |
Output is correct |
| 3 |
Correct |
1 ms |
1772 KB |
Output is correct |
| 4 |
Correct |
1 ms |
1772 KB |
Output is correct |
| 5 |
Correct |
1 ms |
1772 KB |
Output is correct |
| 6 |
Correct |
1 ms |
1772 KB |
Output is correct |
| 7 |
Correct |
1 ms |
1772 KB |
Output is correct |
| 8 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 9 |
Correct |
1 ms |
1772 KB |
Output is correct |
| 10 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 11 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 12 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 13 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 14 |
Correct |
3 ms |
1772 KB |
Output is correct |
| 15 |
Correct |
3 ms |
1772 KB |
Output is correct |
| 16 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 17 |
Correct |
3 ms |
1900 KB |
Output is correct |
| 18 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 19 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 20 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 21 |
Correct |
2 ms |
1792 KB |
Output is correct |
| 22 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 23 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 24 |
Correct |
3 ms |
1900 KB |
Output is correct |
| 25 |
Correct |
3 ms |
1900 KB |
Output is correct |
| 26 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 27 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 28 |
Correct |
3 ms |
1772 KB |
Output is correct |
| 29 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 30 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 31 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 32 |
Correct |
2 ms |
1772 KB |
Output is correct |
| 33 |
Correct |
3 ms |
1900 KB |
Output is correct |
| 34 |
Correct |
3 ms |
1900 KB |
Output is correct |
| 35 |
Correct |
23 ms |
3052 KB |
Output is correct |
| 36 |
Correct |
4 ms |
2028 KB |
Output is correct |
| 37 |
Correct |
19 ms |
2796 KB |
Output is correct |
| 38 |
Correct |
24 ms |
3180 KB |
Output is correct |
| 39 |
Correct |
21 ms |
3180 KB |
Output is correct |
| 40 |
Correct |
22 ms |
3180 KB |
Output is correct |
| 41 |
Correct |
22 ms |
3180 KB |
Output is correct |
| 42 |
Correct |
14 ms |
1920 KB |
Output is correct |
| 43 |
Correct |
17 ms |
1772 KB |
Output is correct |
| 44 |
Correct |
14 ms |
1772 KB |
Output is correct |
| 45 |
Correct |
30 ms |
3184 KB |
Output is correct |
| 46 |
Correct |
25 ms |
3180 KB |
Output is correct |
| 47 |
Correct |
27 ms |
3308 KB |
Output is correct |
| 48 |
Correct |
17 ms |
2924 KB |
Output is correct |
| 49 |
Correct |
16 ms |
2796 KB |
Output is correct |
| 50 |
Correct |
12 ms |
2540 KB |
Output is correct |
| 51 |
Correct |
31 ms |
3948 KB |
Output is correct |
| 52 |
Correct |
32 ms |
3948 KB |
Output is correct |
| 53 |
Correct |
23 ms |
3436 KB |
Output is correct |
| 54 |
Correct |
2 ms |
1900 KB |
Output is correct |
| 55 |
Correct |
2 ms |
1900 KB |
Output is correct |
| 56 |
Correct |
19 ms |
3308 KB |
Output is correct |
| 57 |
Correct |
3 ms |
2028 KB |
Output is correct |
| 58 |
Correct |
12 ms |
1900 KB |
Output is correct |
| 59 |
Correct |
17 ms |
2028 KB |
Output is correct |
| 60 |
Correct |
19 ms |
2156 KB |
Output is correct |
| 61 |
Correct |
16 ms |
2284 KB |
Output is correct |
| 62 |
Correct |
26 ms |
3584 KB |
Output is correct |
| 63 |
Correct |
35 ms |
3436 KB |
Output is correct |
| 64 |
Correct |
36 ms |
3436 KB |
Output is correct |
| 65 |
Correct |
42 ms |
3436 KB |
Output is correct |
| 66 |
Correct |
52 ms |
3436 KB |
Output is correct |
| 67 |
Correct |
55 ms |
3436 KB |
Output is correct |
