#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 = 2e6 + 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 = 500;
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;
}
bool found = false;
for (int i = 0; i < M; i++) {
if (P[i] == d) {
found = true;
break;
}
}
if (!found) {
continue;
}
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 |
23 ms |
47188 KB |
Output is correct |
2 |
Correct |
26 ms |
47188 KB |
Output is correct |
3 |
Correct |
23 ms |
47216 KB |
Output is correct |
4 |
Correct |
25 ms |
47208 KB |
Output is correct |
5 |
Correct |
25 ms |
47180 KB |
Output is correct |
6 |
Correct |
24 ms |
47300 KB |
Output is correct |
7 |
Correct |
25 ms |
47276 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
24 ms |
47316 KB |
Output is correct |
2 |
Correct |
24 ms |
47280 KB |
Output is correct |
3 |
Correct |
25 ms |
47316 KB |
Output is correct |
4 |
Correct |
25 ms |
47272 KB |
Output is correct |
5 |
Correct |
24 ms |
47248 KB |
Output is correct |
6 |
Correct |
26 ms |
47304 KB |
Output is correct |
7 |
Correct |
25 ms |
47188 KB |
Output is correct |
8 |
Correct |
24 ms |
47256 KB |
Output is correct |
9 |
Correct |
27 ms |
47392 KB |
Output is correct |
10 |
Correct |
25 ms |
47664 KB |
Output is correct |
11 |
Correct |
27 ms |
47700 KB |
Output is correct |
12 |
Correct |
26 ms |
47344 KB |
Output is correct |
13 |
Correct |
25 ms |
47316 KB |
Output is correct |
14 |
Correct |
26 ms |
47548 KB |
Output is correct |
15 |
Correct |
26 ms |
47516 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
24 ms |
47188 KB |
Output is correct |
2 |
Correct |
25 ms |
47248 KB |
Output is correct |
3 |
Correct |
27 ms |
47268 KB |
Output is correct |
4 |
Correct |
27 ms |
47180 KB |
Output is correct |
5 |
Correct |
25 ms |
47308 KB |
Output is correct |
6 |
Correct |
25 ms |
47336 KB |
Output is correct |
7 |
Correct |
26 ms |
47188 KB |
Output is correct |
8 |
Correct |
26 ms |
47296 KB |
Output is correct |
9 |
Correct |
25 ms |
47316 KB |
Output is correct |
10 |
Correct |
26 ms |
47700 KB |
Output is correct |
11 |
Correct |
26 ms |
47692 KB |
Output is correct |
12 |
Correct |
25 ms |
47392 KB |
Output is correct |
13 |
Correct |
25 ms |
47316 KB |
Output is correct |
14 |
Correct |
27 ms |
47544 KB |
Output is correct |
15 |
Correct |
27 ms |
47560 KB |
Output is correct |
16 |
Correct |
28 ms |
48868 KB |
Output is correct |
17 |
Correct |
59 ms |
60744 KB |
Output is correct |
18 |
Correct |
64 ms |
63704 KB |
Output is correct |
19 |
Correct |
51 ms |
59300 KB |
Output is correct |
20 |
Correct |
27 ms |
47488 KB |
Output is correct |
21 |
Correct |
30 ms |
50392 KB |
Output is correct |
22 |
Correct |
52 ms |
59800 KB |
Output is correct |
23 |
Correct |
58 ms |
61644 KB |
Output is correct |
24 |
Correct |
87 ms |
75040 KB |
Output is correct |
25 |
Correct |
27 ms |
47828 KB |
Output is correct |
26 |
Correct |
46 ms |
57408 KB |
Output is correct |
27 |
Correct |
45 ms |
56396 KB |
Output is correct |
28 |
Correct |
68 ms |
65596 KB |
Output is correct |
29 |
Correct |
35 ms |
50488 KB |
Output is correct |
30 |
Correct |
27 ms |
48172 KB |
Output is correct |
31 |
Correct |
30 ms |
48924 KB |
Output is correct |
32 |
Correct |
27 ms |
48468 KB |
Output is correct |
33 |
Correct |
47 ms |
53804 KB |
Output is correct |
34 |
Correct |
49 ms |
53796 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
24 ms |
47188 KB |
Output is correct |
2 |
Correct |
25 ms |
47188 KB |
Output is correct |
3 |
Correct |
25 ms |
47216 KB |
Output is correct |
4 |
Correct |
26 ms |
47220 KB |
Output is correct |
5 |
Correct |
30 ms |
47208 KB |
Output is correct |
6 |
Correct |
25 ms |
47272 KB |
Output is correct |
7 |
Correct |
25 ms |
47188 KB |
Output is correct |
8 |
Correct |
26 ms |
47316 KB |
Output is correct |
9 |
Correct |
29 ms |
47284 KB |
Output is correct |
10 |
Correct |
26 ms |
47688 KB |
Output is correct |
11 |
Correct |
26 ms |
47728 KB |
Output is correct |
12 |
Correct |
25 ms |
47308 KB |
Output is correct |
13 |
Correct |
24 ms |
47288 KB |
Output is correct |
14 |
Correct |
27 ms |
47572 KB |
Output is correct |
15 |
Correct |
26 ms |
47596 KB |
Output is correct |
16 |
Correct |
30 ms |
48852 KB |
Output is correct |
17 |
Correct |
57 ms |
60788 KB |
Output is correct |
18 |
Correct |
64 ms |
63668 KB |
Output is correct |
19 |
Correct |
52 ms |
59352 KB |
Output is correct |
20 |
Correct |
26 ms |
47460 KB |
Output is correct |
21 |
Correct |
31 ms |
50436 KB |
Output is correct |
22 |
Correct |
55 ms |
59764 KB |
Output is correct |
23 |
Correct |
59 ms |
61800 KB |
Output is correct |
24 |
Correct |
89 ms |
75132 KB |
Output is correct |
25 |
Correct |
27 ms |
47820 KB |
Output is correct |
26 |
Correct |
46 ms |
57488 KB |
Output is correct |
27 |
Correct |
45 ms |
56416 KB |
Output is correct |
28 |
Correct |
66 ms |
65596 KB |
Output is correct |
29 |
Correct |
35 ms |
50524 KB |
Output is correct |
30 |
Correct |
30 ms |
48120 KB |
Output is correct |
31 |
Correct |
29 ms |
49000 KB |
Output is correct |
32 |
Correct |
27 ms |
48468 KB |
Output is correct |
33 |
Correct |
45 ms |
53712 KB |
Output is correct |
34 |
Correct |
47 ms |
53716 KB |
Output is correct |
35 |
Correct |
123 ms |
81508 KB |
Output is correct |
36 |
Correct |
76 ms |
68800 KB |
Output is correct |
37 |
Correct |
159 ms |
94112 KB |
Output is correct |
38 |
Correct |
167 ms |
96572 KB |
Output is correct |
39 |
Correct |
171 ms |
96584 KB |
Output is correct |
40 |
Correct |
168 ms |
96540 KB |
Output is correct |
41 |
Correct |
168 ms |
96492 KB |
Output is correct |
42 |
Correct |
57 ms |
57676 KB |
Output is correct |
43 |
Correct |
54 ms |
56632 KB |
Output is correct |
44 |
Correct |
33 ms |
47700 KB |
Output is correct |
45 |
Correct |
159 ms |
71960 KB |
Output is correct |
46 |
Correct |
151 ms |
71984 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
24 ms |
47256 KB |
Output is correct |
2 |
Correct |
25 ms |
47292 KB |
Output is correct |
3 |
Correct |
25 ms |
47288 KB |
Output is correct |
4 |
Correct |
28 ms |
47312 KB |
Output is correct |
5 |
Correct |
28 ms |
47288 KB |
Output is correct |
6 |
Correct |
24 ms |
47316 KB |
Output is correct |
7 |
Correct |
24 ms |
47188 KB |
Output is correct |
8 |
Correct |
25 ms |
47232 KB |
Output is correct |
9 |
Correct |
27 ms |
47368 KB |
Output is correct |
10 |
Correct |
29 ms |
47604 KB |
Output is correct |
11 |
Correct |
29 ms |
47692 KB |
Output is correct |
12 |
Correct |
26 ms |
47388 KB |
Output is correct |
13 |
Correct |
25 ms |
47256 KB |
Output is correct |
14 |
Correct |
30 ms |
47572 KB |
Output is correct |
15 |
Correct |
27 ms |
47556 KB |
Output is correct |
16 |
Correct |
32 ms |
48840 KB |
Output is correct |
17 |
Correct |
57 ms |
60784 KB |
Output is correct |
18 |
Correct |
62 ms |
63764 KB |
Output is correct |
19 |
Correct |
52 ms |
59420 KB |
Output is correct |
20 |
Correct |
28 ms |
47444 KB |
Output is correct |
21 |
Correct |
32 ms |
50364 KB |
Output is correct |
22 |
Correct |
52 ms |
59868 KB |
Output is correct |
23 |
Correct |
60 ms |
61644 KB |
Output is correct |
24 |
Correct |
91 ms |
75076 KB |
Output is correct |
25 |
Correct |
28 ms |
47924 KB |
Output is correct |
26 |
Correct |
52 ms |
57420 KB |
Output is correct |
27 |
Correct |
47 ms |
56376 KB |
Output is correct |
28 |
Correct |
66 ms |
65612 KB |
Output is correct |
29 |
Correct |
34 ms |
50564 KB |
Output is correct |
30 |
Correct |
27 ms |
48212 KB |
Output is correct |
31 |
Correct |
29 ms |
48948 KB |
Output is correct |
32 |
Correct |
27 ms |
48516 KB |
Output is correct |
33 |
Correct |
46 ms |
53728 KB |
Output is correct |
34 |
Correct |
44 ms |
53708 KB |
Output is correct |
35 |
Correct |
121 ms |
81492 KB |
Output is correct |
36 |
Correct |
75 ms |
68904 KB |
Output is correct |
37 |
Correct |
169 ms |
94160 KB |
Output is correct |
38 |
Correct |
173 ms |
96632 KB |
Output is correct |
39 |
Correct |
177 ms |
96524 KB |
Output is correct |
40 |
Correct |
168 ms |
96616 KB |
Output is correct |
41 |
Correct |
168 ms |
96620 KB |
Output is correct |
42 |
Correct |
56 ms |
57608 KB |
Output is correct |
43 |
Correct |
57 ms |
56580 KB |
Output is correct |
44 |
Correct |
33 ms |
47688 KB |
Output is correct |
45 |
Correct |
150 ms |
72024 KB |
Output is correct |
46 |
Correct |
151 ms |
72068 KB |
Output is correct |
47 |
Runtime error |
339 ms |
262144 KB |
Execution killed with signal 11 |
48 |
Halted |
0 ms |
0 KB |
- |