#include <bits/stdc++.h>
#define ll long long
#define endl "\n"
using namespace std;
void solve()
{
ll n, m;
cin >> n >> m;
ll b[m], p[m];
vector<ll> eq[n];
for (ll i = 0; i < m; i++)
cin >> b[i] >> p[i], eq[b[i]].push_back(p[i]);
for (ll i = 0; i < n; i++)
sort(eq[i].begin(), eq[i].end(), greater());
ll dist[n];
for (ll i = 0; i < n; i++)
dist[i] = 1e18;
dist[b[0]] = 0;
priority_queue<pair<ll, ll>, vector<pair<ll, ll>>, greater<pair<ll, ll>>> q;
q.push(make_pair(0, b[0]));
while (!q.empty())
{
auto [w, i] = q.top();
q.pop();
if (dist[i] < w)
continue;
for (ll j : eq[i])
{
for (ll k = i - j, cur = 0; k >= 0; k -= j)
{
cur++;
if (dist[k] > w + cur)
q.push(make_pair(dist[k] = w + cur, k));
}
for (ll k = i + j, cur = 0; k < n; k += j)
{
cur++;
if (dist[k] > w + cur)
q.push(make_pair(dist[k] = w + cur, k));
}
}
eq[i].clear();
}
if (dist[b[1]] == 1e18)
dist[b[1]] = -1;
cout << dist[b[1]] << endl;
}
signed main()
{
ios_base::sync_with_stdio(0);
cin.tie(0);
ll t = 1;
// precomp();
// cin >> t;
for (ll i = 1; i <= t; i++)
solve();
cerr << "\nTime elapsed: " << clock() * 1000.0 / CLOCKS_PER_SEC << " ms\n";
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
348 KB |
Output is correct |
| 2 |
Correct |
0 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
344 KB |
Output is correct |
| 5 |
Correct |
1 ms |
348 KB |
Output is correct |
| 6 |
Correct |
0 ms |
348 KB |
Output is correct |
| 7 |
Correct |
1 ms |
344 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
348 KB |
Output is correct |
| 2 |
Correct |
0 ms |
348 KB |
Output is correct |
| 3 |
Correct |
1 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 |
344 KB |
Output is correct |
| 10 |
Correct |
0 ms |
348 KB |
Output is correct |
| 11 |
Correct |
1 ms |
344 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 |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
348 KB |
Output is correct |
| 2 |
Correct |
0 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 |
1 ms |
344 KB |
Output is correct |
| 8 |
Correct |
0 ms |
344 KB |
Output is correct |
| 9 |
Correct |
0 ms |
344 KB |
Output is correct |
| 10 |
Correct |
0 ms |
344 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 |
344 KB |
Output is correct |
| 16 |
Correct |
0 ms |
348 KB |
Output is correct |
| 17 |
Correct |
1 ms |
348 KB |
Output is correct |
| 18 |
Correct |
1 ms |
348 KB |
Output is correct |
| 19 |
Correct |
0 ms |
348 KB |
Output is correct |
| 20 |
Correct |
2 ms |
800 KB |
Output is correct |
| 21 |
Correct |
1 ms |
348 KB |
Output is correct |
| 22 |
Correct |
1 ms |
348 KB |
Output is correct |
| 23 |
Correct |
1 ms |
348 KB |
Output is correct |
| 24 |
Correct |
1 ms |
604 KB |
Output is correct |
| 25 |
Correct |
2 ms |
604 KB |
Output is correct |
| 26 |
Correct |
2 ms |
348 KB |
Output is correct |
| 27 |
Correct |
2 ms |
604 KB |
Output is correct |
| 28 |
Correct |
1 ms |
604 KB |
Output is correct |
| 29 |
Correct |
1 ms |
604 KB |
Output is correct |
| 30 |
Correct |
1 ms |
604 KB |
Output is correct |
| 31 |
Correct |
1 ms |
604 KB |
Output is correct |
| 32 |
Correct |
1 ms |
604 KB |
Output is correct |
| 33 |
Correct |
2 ms |
604 KB |
Output is correct |
| 34 |
Correct |
1 ms |
604 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
344 KB |
Output is correct |
| 2 |
Correct |
0 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 |
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 |
0 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 |
1 ms |
348 KB |
Output is correct |
| 18 |
Correct |
1 ms |
600 KB |
Output is correct |
| 19 |
Correct |
1 ms |
348 KB |
Output is correct |
| 20 |
Correct |
3 ms |
604 KB |
Output is correct |
| 21 |
Correct |
1 ms |
348 KB |
Output is correct |
| 22 |
Correct |
0 ms |
348 KB |
Output is correct |
| 23 |
Correct |
1 ms |
348 KB |
Output is correct |
| 24 |
Correct |
1 ms |
600 KB |
Output is correct |
| 25 |
Correct |
1 ms |
604 KB |
Output is correct |
| 26 |
Correct |
2 ms |
348 KB |
Output is correct |
| 27 |
Correct |
2 ms |
604 KB |
Output is correct |
| 28 |
Correct |
1 ms |
604 KB |
Output is correct |
| 29 |
Correct |
1 ms |
604 KB |
Output is correct |
| 30 |
Correct |
1 ms |
604 KB |
Output is correct |
| 31 |
Correct |
1 ms |
744 KB |
Output is correct |
| 32 |
Correct |
1 ms |
604 KB |
Output is correct |
| 33 |
Correct |
2 ms |
604 KB |
Output is correct |
| 34 |
Correct |
1 ms |
604 KB |
Output is correct |
| 35 |
Correct |
5 ms |
1236 KB |
Output is correct |
| 36 |
Correct |
1 ms |
604 KB |
Output is correct |
| 37 |
Correct |
4 ms |
1116 KB |
Output is correct |
| 38 |
Correct |
6 ms |
1628 KB |
Output is correct |
| 39 |
Correct |
6 ms |
1628 KB |
Output is correct |
| 40 |
Correct |
6 ms |
1628 KB |
Output is correct |
| 41 |
Correct |
7 ms |
1628 KB |
Output is correct |
| 42 |
Correct |
30 ms |
1244 KB |
Output is correct |
| 43 |
Correct |
29 ms |
1368 KB |
Output is correct |
| 44 |
Correct |
32 ms |
1284 KB |
Output is correct |
| 45 |
Correct |
6 ms |
1372 KB |
Output is correct |
| 46 |
Correct |
6 ms |
1372 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
348 KB |
Output is correct |
| 2 |
Correct |
0 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 |
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 |
352 KB |
Output is correct |
| 10 |
Correct |
1 ms |
352 KB |
Output is correct |
| 11 |
Correct |
1 ms |
356 KB |
Output is correct |
| 12 |
Correct |
1 ms |
360 KB |
Output is correct |
| 13 |
Correct |
1 ms |
360 KB |
Output is correct |
| 14 |
Correct |
1 ms |
360 KB |
Output is correct |
| 15 |
Correct |
1 ms |
360 KB |
Output is correct |
| 16 |
Correct |
0 ms |
360 KB |
Output is correct |
| 17 |
Correct |
1 ms |
360 KB |
Output is correct |
| 18 |
Correct |
1 ms |
532 KB |
Output is correct |
| 19 |
Correct |
1 ms |
360 KB |
Output is correct |
| 20 |
Correct |
3 ms |
616 KB |
Output is correct |
| 21 |
Correct |
1 ms |
360 KB |
Output is correct |
| 22 |
Correct |
0 ms |
348 KB |
Output is correct |
| 23 |
Correct |
1 ms |
348 KB |
Output is correct |
| 24 |
Correct |
1 ms |
604 KB |
Output is correct |
| 25 |
Correct |
1 ms |
604 KB |
Output is correct |
| 26 |
Correct |
2 ms |
604 KB |
Output is correct |
| 27 |
Correct |
2 ms |
348 KB |
Output is correct |
| 28 |
Correct |
1 ms |
604 KB |
Output is correct |
| 29 |
Correct |
2 ms |
604 KB |
Output is correct |
| 30 |
Correct |
1 ms |
604 KB |
Output is correct |
| 31 |
Correct |
1 ms |
604 KB |
Output is correct |
| 32 |
Correct |
1 ms |
604 KB |
Output is correct |
| 33 |
Correct |
1 ms |
604 KB |
Output is correct |
| 34 |
Correct |
2 ms |
604 KB |
Output is correct |
| 35 |
Correct |
5 ms |
1388 KB |
Output is correct |
| 36 |
Correct |
1 ms |
604 KB |
Output is correct |
| 37 |
Correct |
4 ms |
1196 KB |
Output is correct |
| 38 |
Correct |
6 ms |
1628 KB |
Output is correct |
| 39 |
Correct |
6 ms |
1628 KB |
Output is correct |
| 40 |
Correct |
6 ms |
1628 KB |
Output is correct |
| 41 |
Correct |
7 ms |
1628 KB |
Output is correct |
| 42 |
Correct |
30 ms |
1312 KB |
Output is correct |
| 43 |
Correct |
32 ms |
1244 KB |
Output is correct |
| 44 |
Correct |
35 ms |
1284 KB |
Output is correct |
| 45 |
Correct |
7 ms |
1372 KB |
Output is correct |
| 46 |
Correct |
5 ms |
1372 KB |
Output is correct |
| 47 |
Correct |
13 ms |
2780 KB |
Output is correct |
| 48 |
Correct |
5 ms |
1884 KB |
Output is correct |
| 49 |
Correct |
5 ms |
1884 KB |
Output is correct |
| 50 |
Correct |
4 ms |
1884 KB |
Output is correct |
| 51 |
Correct |
21 ms |
4532 KB |
Output is correct |
| 52 |
Correct |
20 ms |
3544 KB |
Output is correct |
| 53 |
Correct |
11 ms |
3644 KB |
Output is correct |
| 54 |
Correct |
2 ms |
1760 KB |
Output is correct |
| 55 |
Correct |
2 ms |
1628 KB |
Output is correct |
| 56 |
Correct |
352 ms |
3292 KB |
Output is correct |
| 57 |
Correct |
38 ms |
6088 KB |
Output is correct |
| 58 |
Correct |
286 ms |
2396 KB |
Output is correct |
| 59 |
Correct |
443 ms |
2392 KB |
Output is correct |
| 60 |
Correct |
314 ms |
2396 KB |
Output is correct |
| 61 |
Correct |
356 ms |
2388 KB |
Output is correct |
| 62 |
Correct |
7 ms |
2652 KB |
Output is correct |
| 63 |
Correct |
25 ms |
4304 KB |
Output is correct |
| 64 |
Correct |
24 ms |
4312 KB |
Output is correct |
| 65 |
Correct |
28 ms |
6604 KB |
Output is correct |
| 66 |
Correct |
30 ms |
7120 KB |
Output is correct |
| 67 |
Correct |
32 ms |
7120 KB |
Output is correct |
