#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";
}
# |
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 |
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 |
# |
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 |
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 |
# |
Verdict |
Execution time |
Memory |
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 |
# |
Verdict |
Execution time |
Memory |
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 |
# |
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 |
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 |