#include <bits/stdc++.h>
using namespace std;
int main() {
int n, m;
cin >> n >> m;
vector<int> a(m), b(m);
for (int i = 0; i < m; i++) cin >> a[i] >> b[i];
int sn = sqrt(n * __lg(n)) + 1;
vector<vector<int64_t>> d(n, vector<int64_t>(sn + 1, 9e18));
vector<vector<vector<tuple<int, int, int>>>> adj(n, vector<vector<tuple<int, int, int>>>(sn + 1));
for (int i = 0; i < m; i++) {
if (b[i] < sn) {
adj[a[i]][sn].emplace_back(a[i], b[i], 0);
} else {
for (int j = a[i] % b[i]; j < n; j += b[i]) {
adj[a[i]][sn].emplace_back(j, sn, abs(a[i] - j) / b[i]);
}
}
}
d[a[0]][sn] = 0;
priority_queue<tuple<int64_t, int, int>> pq;
pq.emplace(0, a[0], sn);
while (pq.size()) {
auto [du, u, s] = pq.top();
pq.pop();
if (d[u][s] != -du) continue;
du = -du;
if (u == a[1]) return cout << du, 0;
if (s != sn && u - s >= 0) {
int uu = u - s, ss = s, c = 1;
if (d[uu][ss] > du + c) {
d[uu][ss] = du + c;
pq.emplace(-d[uu][ss], uu, ss);
}
ss = sn;
if (d[uu][ss] > du + c) {
d[uu][ss] = du + c;
pq.emplace(-d[uu][ss], uu, ss);
}
}
if (s != sn && u + s < n) {
int uu = u + s, ss = s, c = 1;
if (d[uu][ss] > du + c) {
d[uu][ss] = du + c;
pq.emplace(-d[uu][ss], uu, ss);
}
ss = sn;
if (d[uu][ss] > du + c) {
d[uu][ss] = du + c;
pq.emplace(-d[uu][ss], uu, ss);
}
}
for (auto [uu, ss, c] : adj[u][s]) {
if (d[uu][ss] > du + c) {
d[uu][ss] = du + c;
pq.emplace(-d[uu][ss], uu, ss);
}
}
}
cout << -1;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
212 KB |
Output is correct |
2 |
Correct |
0 ms |
224 KB |
Output is correct |
3 |
Correct |
0 ms |
212 KB |
Output is correct |
4 |
Correct |
0 ms |
212 KB |
Output is correct |
5 |
Correct |
0 ms |
212 KB |
Output is correct |
6 |
Correct |
0 ms |
212 KB |
Output is correct |
7 |
Correct |
0 ms |
212 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
212 KB |
Output is correct |
2 |
Correct |
0 ms |
212 KB |
Output is correct |
3 |
Correct |
0 ms |
212 KB |
Output is correct |
4 |
Correct |
0 ms |
212 KB |
Output is correct |
5 |
Correct |
0 ms |
212 KB |
Output is correct |
6 |
Correct |
0 ms |
212 KB |
Output is correct |
7 |
Correct |
0 ms |
212 KB |
Output is correct |
8 |
Correct |
0 ms |
212 KB |
Output is correct |
9 |
Correct |
1 ms |
340 KB |
Output is correct |
10 |
Correct |
1 ms |
340 KB |
Output is correct |
11 |
Correct |
1 ms |
468 KB |
Output is correct |
12 |
Correct |
1 ms |
340 KB |
Output is correct |
13 |
Correct |
1 ms |
340 KB |
Output is correct |
14 |
Correct |
1 ms |
468 KB |
Output is correct |
15 |
Correct |
2 ms |
468 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
212 KB |
Output is correct |
2 |
Correct |
0 ms |
212 KB |
Output is correct |
3 |
Correct |
0 ms |
212 KB |
Output is correct |
4 |
Correct |
1 ms |
212 KB |
Output is correct |
5 |
Correct |
1 ms |
212 KB |
Output is correct |
6 |
Correct |
0 ms |
212 KB |
Output is correct |
7 |
Correct |
0 ms |
212 KB |
Output is correct |
8 |
Correct |
0 ms |
212 KB |
Output is correct |
9 |
Correct |
0 ms |
212 KB |
Output is correct |
10 |
Correct |
1 ms |
340 KB |
Output is correct |
11 |
Correct |
2 ms |
468 KB |
Output is correct |
12 |
Correct |
1 ms |
340 KB |
Output is correct |
13 |
Correct |
1 ms |
340 KB |
Output is correct |
14 |
Correct |
2 ms |
468 KB |
Output is correct |
15 |
Correct |
1 ms |
468 KB |
Output is correct |
16 |
Correct |
1 ms |
596 KB |
Output is correct |
17 |
Correct |
3 ms |
2388 KB |
Output is correct |
18 |
Correct |
5 ms |
7764 KB |
Output is correct |
19 |
Correct |
6 ms |
9412 KB |
Output is correct |
20 |
Correct |
7 ms |
9428 KB |
Output is correct |
21 |
Correct |
2 ms |
980 KB |
Output is correct |
22 |
Correct |
5 ms |
7892 KB |
Output is correct |
23 |
Correct |
5 ms |
6868 KB |
Output is correct |
24 |
Correct |
7 ms |
8788 KB |
Output is correct |
25 |
Correct |
7 ms |
9428 KB |
Output is correct |
26 |
Correct |
7 ms |
9428 KB |
Output is correct |
27 |
Correct |
10 ms |
9428 KB |
Output is correct |
28 |
Correct |
8 ms |
9508 KB |
Output is correct |
29 |
Correct |
12 ms |
9428 KB |
Output is correct |
30 |
Correct |
7 ms |
9300 KB |
Output is correct |
31 |
Correct |
13 ms |
9432 KB |
Output is correct |
32 |
Correct |
9 ms |
9364 KB |
Output is correct |
33 |
Correct |
21 ms |
9428 KB |
Output is correct |
34 |
Correct |
14 ms |
9428 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
212 KB |
Output is correct |
2 |
Correct |
0 ms |
212 KB |
Output is correct |
3 |
Correct |
1 ms |
212 KB |
Output is correct |
4 |
Correct |
1 ms |
212 KB |
Output is correct |
5 |
Correct |
0 ms |
212 KB |
Output is correct |
6 |
Correct |
0 ms |
212 KB |
Output is correct |
7 |
Correct |
1 ms |
212 KB |
Output is correct |
8 |
Correct |
0 ms |
212 KB |
Output is correct |
9 |
Correct |
1 ms |
212 KB |
Output is correct |
10 |
Correct |
1 ms |
340 KB |
Output is correct |
11 |
Correct |
1 ms |
468 KB |
Output is correct |
12 |
Correct |
1 ms |
340 KB |
Output is correct |
13 |
Correct |
1 ms |
340 KB |
Output is correct |
14 |
Correct |
2 ms |
468 KB |
Output is correct |
15 |
Correct |
1 ms |
468 KB |
Output is correct |
16 |
Correct |
1 ms |
596 KB |
Output is correct |
17 |
Correct |
3 ms |
2388 KB |
Output is correct |
18 |
Correct |
6 ms |
7780 KB |
Output is correct |
19 |
Correct |
7 ms |
9300 KB |
Output is correct |
20 |
Correct |
7 ms |
9428 KB |
Output is correct |
21 |
Correct |
1 ms |
980 KB |
Output is correct |
22 |
Correct |
5 ms |
7892 KB |
Output is correct |
23 |
Correct |
5 ms |
6868 KB |
Output is correct |
24 |
Correct |
7 ms |
8788 KB |
Output is correct |
25 |
Correct |
7 ms |
9428 KB |
Output is correct |
26 |
Correct |
7 ms |
9376 KB |
Output is correct |
27 |
Correct |
7 ms |
9448 KB |
Output is correct |
28 |
Correct |
8 ms |
9428 KB |
Output is correct |
29 |
Correct |
12 ms |
9428 KB |
Output is correct |
30 |
Correct |
7 ms |
9300 KB |
Output is correct |
31 |
Correct |
10 ms |
9340 KB |
Output is correct |
32 |
Correct |
8 ms |
9300 KB |
Output is correct |
33 |
Correct |
21 ms |
9428 KB |
Output is correct |
34 |
Correct |
14 ms |
9536 KB |
Output is correct |
35 |
Correct |
17 ms |
7160 KB |
Output is correct |
36 |
Correct |
5 ms |
4180 KB |
Output is correct |
37 |
Correct |
16 ms |
10708 KB |
Output is correct |
38 |
Correct |
25 ms |
11348 KB |
Output is correct |
39 |
Correct |
21 ms |
11084 KB |
Output is correct |
40 |
Correct |
21 ms |
11280 KB |
Output is correct |
41 |
Correct |
24 ms |
11412 KB |
Output is correct |
42 |
Correct |
17 ms |
10116 KB |
Output is correct |
43 |
Correct |
17 ms |
10132 KB |
Output is correct |
44 |
Correct |
18 ms |
10116 KB |
Output is correct |
45 |
Correct |
56 ms |
14100 KB |
Output is correct |
46 |
Correct |
32 ms |
14212 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
212 KB |
Output is correct |
2 |
Correct |
0 ms |
212 KB |
Output is correct |
3 |
Correct |
1 ms |
212 KB |
Output is correct |
4 |
Correct |
0 ms |
212 KB |
Output is correct |
5 |
Correct |
1 ms |
212 KB |
Output is correct |
6 |
Correct |
1 ms |
212 KB |
Output is correct |
7 |
Correct |
1 ms |
212 KB |
Output is correct |
8 |
Correct |
0 ms |
212 KB |
Output is correct |
9 |
Correct |
0 ms |
340 KB |
Output is correct |
10 |
Correct |
1 ms |
340 KB |
Output is correct |
11 |
Correct |
1 ms |
468 KB |
Output is correct |
12 |
Correct |
1 ms |
340 KB |
Output is correct |
13 |
Correct |
1 ms |
340 KB |
Output is correct |
14 |
Correct |
1 ms |
468 KB |
Output is correct |
15 |
Correct |
1 ms |
468 KB |
Output is correct |
16 |
Correct |
1 ms |
468 KB |
Output is correct |
17 |
Correct |
3 ms |
2388 KB |
Output is correct |
18 |
Correct |
5 ms |
7764 KB |
Output is correct |
19 |
Correct |
7 ms |
9428 KB |
Output is correct |
20 |
Correct |
7 ms |
9428 KB |
Output is correct |
21 |
Correct |
2 ms |
980 KB |
Output is correct |
22 |
Correct |
6 ms |
7892 KB |
Output is correct |
23 |
Correct |
5 ms |
6868 KB |
Output is correct |
24 |
Correct |
7 ms |
8760 KB |
Output is correct |
25 |
Correct |
7 ms |
9428 KB |
Output is correct |
26 |
Correct |
9 ms |
9428 KB |
Output is correct |
27 |
Correct |
7 ms |
9428 KB |
Output is correct |
28 |
Correct |
8 ms |
9428 KB |
Output is correct |
29 |
Correct |
14 ms |
9428 KB |
Output is correct |
30 |
Correct |
7 ms |
9300 KB |
Output is correct |
31 |
Correct |
9 ms |
9300 KB |
Output is correct |
32 |
Correct |
9 ms |
9300 KB |
Output is correct |
33 |
Correct |
19 ms |
9536 KB |
Output is correct |
34 |
Correct |
14 ms |
9536 KB |
Output is correct |
35 |
Correct |
17 ms |
7124 KB |
Output is correct |
36 |
Correct |
5 ms |
4180 KB |
Output is correct |
37 |
Correct |
17 ms |
10684 KB |
Output is correct |
38 |
Correct |
22 ms |
11348 KB |
Output is correct |
39 |
Correct |
21 ms |
11156 KB |
Output is correct |
40 |
Correct |
21 ms |
11284 KB |
Output is correct |
41 |
Correct |
23 ms |
11412 KB |
Output is correct |
42 |
Correct |
19 ms |
10072 KB |
Output is correct |
43 |
Correct |
18 ms |
10056 KB |
Output is correct |
44 |
Correct |
18 ms |
10100 KB |
Output is correct |
45 |
Correct |
55 ms |
14028 KB |
Output is correct |
46 |
Correct |
32 ms |
14216 KB |
Output is correct |
47 |
Correct |
105 ms |
161440 KB |
Output is correct |
48 |
Runtime error |
121 ms |
262144 KB |
Execution killed with signal 9 |
49 |
Halted |
0 ms |
0 KB |
- |