#include <bits/stdc++.h>
using namespace std;
void just_do_it();
int main() {
#ifdef KAMIRULEZ
freopen("kamirulez.inp", "r", stdin);
freopen("kamirulez.out", "w", stdout);
#endif
ios_base::sync_with_stdio(0);
cin.tie(0);
just_do_it();
return 0;
}
const int maxN = 3e4 + 20;
const int maxC = 1e6 + 20;
const int inf = 1e9 + 20;
int B[maxN];
int P[maxN];
vector<pair<int, bool>> adj[maxC];
int dist[maxC];
bool flag[maxN];
int id[maxN];
void just_do_it() {
int N, M;
cin >> N >> M;
const int lim = sqrt(N);
int cnt = N;
for (int i = 0; i < M; i++) {
cin >> B[i] >> P[i];
if (P[i] > lim) {
int cur = B[i] % P[i];
int nxt = cur + P[i];
for (; cur < N; cur += P[i], nxt += P[i]) {
if (nxt < N) {
adj[cnt].emplace_back(cnt + 1, 1);
adj[cnt + 1].emplace_back(cnt, 1);
}
if (cur == B[i]) {
adj[B[i]].emplace_back(cnt, 0);
}
adj[cnt].emplace_back(cur, 0);
cnt++;
}
}
}
for (int d = 1; d <= lim; d++) {
for (int i = 0; i < N; i++) {
flag[i] = false;
}
for (int i = 0; i < d; i++) {
int cur = i;
int nxt = cur + d;
for (; cur < N; cur += d, nxt += d) {
if (nxt < N) {
adj[cnt].emplace_back(cnt + 1, 1);
adj[cnt + 1].emplace_back(cnt, 1);
}
id[cur] = cnt;
adj[cnt].emplace_back(cur, 0);
cnt++;
}
}
for (int i = 0; i < M; i++) {
if (P[i] == d && !flag[B[i]]) {
flag[B[i]] = true;
adj[B[i]].emplace_back(id[B[i]], 0);
}
}
}
assert(cnt < maxC);
for (int i = 0; i < cnt; i++) {
dist[i] = inf;
}
dist[B[0]] = 0;
deque<int> q = {B[0]};
while (!q.empty()) {
int u = q.front();
q.pop_front();
for (auto p: adj[u]) {
int v = p.first;
int w = p.second;
if (dist[u] + w < dist[v]) {
dist[v] = dist[u] + w;
if (w == 0) {
q.push_front(v);
}
else {
q.push_back(v);
}
}
}
}
if (dist[B[1]] == inf) {
cout << -1;
}
else {
cout << dist[B[1]];
}
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
13 ms |
23744 KB |
Output is correct |
2 |
Correct |
13 ms |
23792 KB |
Output is correct |
3 |
Correct |
13 ms |
23764 KB |
Output is correct |
4 |
Correct |
12 ms |
23764 KB |
Output is correct |
5 |
Correct |
14 ms |
23764 KB |
Output is correct |
6 |
Correct |
14 ms |
23804 KB |
Output is correct |
7 |
Correct |
13 ms |
23764 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
13 ms |
23764 KB |
Output is correct |
2 |
Correct |
12 ms |
23768 KB |
Output is correct |
3 |
Correct |
13 ms |
23832 KB |
Output is correct |
4 |
Correct |
12 ms |
23720 KB |
Output is correct |
5 |
Correct |
12 ms |
23764 KB |
Output is correct |
6 |
Correct |
12 ms |
23776 KB |
Output is correct |
7 |
Correct |
13 ms |
23764 KB |
Output is correct |
8 |
Correct |
13 ms |
23764 KB |
Output is correct |
9 |
Correct |
13 ms |
23760 KB |
Output is correct |
10 |
Correct |
15 ms |
23892 KB |
Output is correct |
11 |
Correct |
13 ms |
24020 KB |
Output is correct |
12 |
Correct |
13 ms |
23892 KB |
Output is correct |
13 |
Correct |
15 ms |
23840 KB |
Output is correct |
14 |
Correct |
13 ms |
24020 KB |
Output is correct |
15 |
Correct |
14 ms |
24112 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
14 ms |
23764 KB |
Output is correct |
2 |
Correct |
12 ms |
23764 KB |
Output is correct |
3 |
Correct |
13 ms |
23772 KB |
Output is correct |
4 |
Correct |
14 ms |
23764 KB |
Output is correct |
5 |
Correct |
12 ms |
23764 KB |
Output is correct |
6 |
Correct |
12 ms |
23816 KB |
Output is correct |
7 |
Correct |
12 ms |
23764 KB |
Output is correct |
8 |
Correct |
13 ms |
23764 KB |
Output is correct |
9 |
Correct |
13 ms |
23828 KB |
Output is correct |
10 |
Correct |
14 ms |
23892 KB |
Output is correct |
11 |
Correct |
14 ms |
24020 KB |
Output is correct |
12 |
Correct |
13 ms |
23844 KB |
Output is correct |
13 |
Correct |
12 ms |
23892 KB |
Output is correct |
14 |
Correct |
13 ms |
24020 KB |
Output is correct |
15 |
Correct |
14 ms |
24124 KB |
Output is correct |
16 |
Correct |
14 ms |
24020 KB |
Output is correct |
17 |
Correct |
17 ms |
25192 KB |
Output is correct |
18 |
Correct |
22 ms |
27668 KB |
Output is correct |
19 |
Correct |
25 ms |
28412 KB |
Output is correct |
20 |
Correct |
28 ms |
28276 KB |
Output is correct |
21 |
Correct |
15 ms |
24200 KB |
Output is correct |
22 |
Correct |
22 ms |
27692 KB |
Output is correct |
23 |
Correct |
24 ms |
27092 KB |
Output is correct |
24 |
Correct |
28 ms |
28360 KB |
Output is correct |
25 |
Correct |
30 ms |
28496 KB |
Output is correct |
26 |
Correct |
23 ms |
28372 KB |
Output is correct |
27 |
Correct |
23 ms |
28364 KB |
Output is correct |
28 |
Correct |
27 ms |
28804 KB |
Output is correct |
29 |
Correct |
26 ms |
28244 KB |
Output is correct |
30 |
Correct |
24 ms |
28176 KB |
Output is correct |
31 |
Correct |
24 ms |
28344 KB |
Output is correct |
32 |
Correct |
25 ms |
28816 KB |
Output is correct |
33 |
Correct |
35 ms |
30280 KB |
Output is correct |
34 |
Correct |
36 ms |
30224 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
13 ms |
23800 KB |
Output is correct |
2 |
Correct |
12 ms |
23764 KB |
Output is correct |
3 |
Correct |
12 ms |
23764 KB |
Output is correct |
4 |
Correct |
13 ms |
23776 KB |
Output is correct |
5 |
Correct |
13 ms |
23820 KB |
Output is correct |
6 |
Correct |
13 ms |
23764 KB |
Output is correct |
7 |
Correct |
13 ms |
23788 KB |
Output is correct |
8 |
Correct |
13 ms |
23776 KB |
Output is correct |
9 |
Correct |
15 ms |
23780 KB |
Output is correct |
10 |
Correct |
13 ms |
23892 KB |
Output is correct |
11 |
Correct |
14 ms |
24020 KB |
Output is correct |
12 |
Correct |
13 ms |
23892 KB |
Output is correct |
13 |
Correct |
13 ms |
23892 KB |
Output is correct |
14 |
Correct |
13 ms |
24040 KB |
Output is correct |
15 |
Correct |
13 ms |
24020 KB |
Output is correct |
16 |
Correct |
15 ms |
24020 KB |
Output is correct |
17 |
Correct |
17 ms |
25136 KB |
Output is correct |
18 |
Correct |
21 ms |
27604 KB |
Output is correct |
19 |
Correct |
22 ms |
28364 KB |
Output is correct |
20 |
Correct |
24 ms |
28284 KB |
Output is correct |
21 |
Correct |
15 ms |
24276 KB |
Output is correct |
22 |
Correct |
22 ms |
27724 KB |
Output is correct |
23 |
Correct |
21 ms |
27096 KB |
Output is correct |
24 |
Correct |
26 ms |
28284 KB |
Output is correct |
25 |
Correct |
24 ms |
28500 KB |
Output is correct |
26 |
Correct |
24 ms |
28440 KB |
Output is correct |
27 |
Correct |
23 ms |
28384 KB |
Output is correct |
28 |
Correct |
24 ms |
28720 KB |
Output is correct |
29 |
Correct |
26 ms |
28244 KB |
Output is correct |
30 |
Correct |
23 ms |
28284 KB |
Output is correct |
31 |
Correct |
24 ms |
28300 KB |
Output is correct |
32 |
Correct |
25 ms |
28884 KB |
Output is correct |
33 |
Correct |
32 ms |
30260 KB |
Output is correct |
34 |
Correct |
35 ms |
30304 KB |
Output is correct |
35 |
Correct |
41 ms |
30404 KB |
Output is correct |
36 |
Correct |
21 ms |
26232 KB |
Output is correct |
37 |
Correct |
65 ms |
34608 KB |
Output is correct |
38 |
Correct |
68 ms |
34344 KB |
Output is correct |
39 |
Correct |
60 ms |
34368 KB |
Output is correct |
40 |
Correct |
61 ms |
34340 KB |
Output is correct |
41 |
Correct |
62 ms |
34444 KB |
Output is correct |
42 |
Correct |
29 ms |
28784 KB |
Output is correct |
43 |
Correct |
28 ms |
28788 KB |
Output is correct |
44 |
Correct |
28 ms |
28756 KB |
Output is correct |
45 |
Correct |
126 ms |
48588 KB |
Output is correct |
46 |
Correct |
134 ms |
48604 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
15 ms |
23764 KB |
Output is correct |
2 |
Correct |
14 ms |
23716 KB |
Output is correct |
3 |
Correct |
13 ms |
23712 KB |
Output is correct |
4 |
Correct |
13 ms |
23764 KB |
Output is correct |
5 |
Correct |
14 ms |
23776 KB |
Output is correct |
6 |
Correct |
13 ms |
23816 KB |
Output is correct |
7 |
Correct |
12 ms |
23796 KB |
Output is correct |
8 |
Correct |
12 ms |
23768 KB |
Output is correct |
9 |
Correct |
12 ms |
23764 KB |
Output is correct |
10 |
Correct |
13 ms |
23816 KB |
Output is correct |
11 |
Correct |
13 ms |
24020 KB |
Output is correct |
12 |
Correct |
13 ms |
23892 KB |
Output is correct |
13 |
Correct |
14 ms |
23796 KB |
Output is correct |
14 |
Correct |
14 ms |
24132 KB |
Output is correct |
15 |
Correct |
14 ms |
24148 KB |
Output is correct |
16 |
Correct |
14 ms |
24020 KB |
Output is correct |
17 |
Correct |
18 ms |
25172 KB |
Output is correct |
18 |
Correct |
22 ms |
27604 KB |
Output is correct |
19 |
Correct |
23 ms |
28376 KB |
Output is correct |
20 |
Correct |
25 ms |
28372 KB |
Output is correct |
21 |
Correct |
14 ms |
24212 KB |
Output is correct |
22 |
Correct |
22 ms |
27696 KB |
Output is correct |
23 |
Correct |
20 ms |
27088 KB |
Output is correct |
24 |
Correct |
24 ms |
28296 KB |
Output is correct |
25 |
Correct |
23 ms |
28500 KB |
Output is correct |
26 |
Correct |
23 ms |
28412 KB |
Output is correct |
27 |
Correct |
23 ms |
28372 KB |
Output is correct |
28 |
Correct |
24 ms |
28824 KB |
Output is correct |
29 |
Correct |
25 ms |
28368 KB |
Output is correct |
30 |
Correct |
23 ms |
28244 KB |
Output is correct |
31 |
Correct |
25 ms |
28304 KB |
Output is correct |
32 |
Correct |
26 ms |
28840 KB |
Output is correct |
33 |
Correct |
32 ms |
30172 KB |
Output is correct |
34 |
Correct |
33 ms |
30232 KB |
Output is correct |
35 |
Correct |
40 ms |
30480 KB |
Output is correct |
36 |
Correct |
20 ms |
26264 KB |
Output is correct |
37 |
Correct |
59 ms |
34528 KB |
Output is correct |
38 |
Correct |
59 ms |
34308 KB |
Output is correct |
39 |
Correct |
59 ms |
34376 KB |
Output is correct |
40 |
Correct |
58 ms |
34480 KB |
Output is correct |
41 |
Correct |
57 ms |
34360 KB |
Output is correct |
42 |
Correct |
27 ms |
28884 KB |
Output is correct |
43 |
Correct |
26 ms |
28756 KB |
Output is correct |
44 |
Correct |
26 ms |
28752 KB |
Output is correct |
45 |
Correct |
153 ms |
48540 KB |
Output is correct |
46 |
Correct |
149 ms |
48484 KB |
Output is correct |
47 |
Runtime error |
170 ms |
142140 KB |
Execution killed with signal 11 |
48 |
Halted |
0 ms |
0 KB |
- |