#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 = 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;
}
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]];
}
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
23 ms |
47316 KB |
Output is correct |
2 |
Correct |
22 ms |
47188 KB |
Output is correct |
3 |
Correct |
23 ms |
47296 KB |
Output is correct |
4 |
Correct |
24 ms |
47228 KB |
Output is correct |
5 |
Correct |
30 ms |
47216 KB |
Output is correct |
6 |
Correct |
22 ms |
47312 KB |
Output is correct |
7 |
Correct |
22 ms |
47188 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
23 ms |
47188 KB |
Output is correct |
2 |
Correct |
24 ms |
47280 KB |
Output is correct |
3 |
Correct |
27 ms |
47280 KB |
Output is correct |
4 |
Correct |
24 ms |
47296 KB |
Output is correct |
5 |
Correct |
31 ms |
47188 KB |
Output is correct |
6 |
Correct |
24 ms |
47204 KB |
Output is correct |
7 |
Correct |
24 ms |
47280 KB |
Output is correct |
8 |
Correct |
30 ms |
47316 KB |
Output is correct |
9 |
Correct |
24 ms |
47304 KB |
Output is correct |
10 |
Correct |
24 ms |
47380 KB |
Output is correct |
11 |
Correct |
26 ms |
47572 KB |
Output is correct |
12 |
Correct |
26 ms |
47248 KB |
Output is correct |
13 |
Correct |
28 ms |
47248 KB |
Output is correct |
14 |
Correct |
36 ms |
47572 KB |
Output is correct |
15 |
Correct |
27 ms |
47552 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
27 ms |
47260 KB |
Output is correct |
2 |
Correct |
25 ms |
47256 KB |
Output is correct |
3 |
Correct |
25 ms |
47180 KB |
Output is correct |
4 |
Correct |
25 ms |
47188 KB |
Output is correct |
5 |
Correct |
27 ms |
47288 KB |
Output is correct |
6 |
Correct |
27 ms |
47188 KB |
Output is correct |
7 |
Correct |
23 ms |
47304 KB |
Output is correct |
8 |
Correct |
22 ms |
47316 KB |
Output is correct |
9 |
Correct |
26 ms |
47224 KB |
Output is correct |
10 |
Correct |
27 ms |
47340 KB |
Output is correct |
11 |
Correct |
27 ms |
47488 KB |
Output is correct |
12 |
Correct |
24 ms |
47284 KB |
Output is correct |
13 |
Correct |
24 ms |
47300 KB |
Output is correct |
14 |
Correct |
27 ms |
47580 KB |
Output is correct |
15 |
Correct |
28 ms |
47516 KB |
Output is correct |
16 |
Correct |
27 ms |
47472 KB |
Output is correct |
17 |
Correct |
30 ms |
48704 KB |
Output is correct |
18 |
Correct |
29 ms |
49112 KB |
Output is correct |
19 |
Correct |
35 ms |
48324 KB |
Output is correct |
20 |
Correct |
26 ms |
47436 KB |
Output is correct |
21 |
Correct |
25 ms |
47564 KB |
Output is correct |
22 |
Correct |
26 ms |
48448 KB |
Output is correct |
23 |
Correct |
28 ms |
48836 KB |
Output is correct |
24 |
Correct |
33 ms |
50380 KB |
Output is correct |
25 |
Correct |
27 ms |
47720 KB |
Output is correct |
26 |
Correct |
37 ms |
49756 KB |
Output is correct |
27 |
Correct |
34 ms |
48848 KB |
Output is correct |
28 |
Correct |
34 ms |
50892 KB |
Output is correct |
29 |
Correct |
45 ms |
50544 KB |
Output is correct |
30 |
Correct |
27 ms |
48152 KB |
Output is correct |
31 |
Correct |
28 ms |
48980 KB |
Output is correct |
32 |
Correct |
27 ms |
48536 KB |
Output is correct |
33 |
Correct |
45 ms |
53748 KB |
Output is correct |
34 |
Correct |
45 ms |
53716 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
25 ms |
47188 KB |
Output is correct |
2 |
Correct |
25 ms |
47188 KB |
Output is correct |
3 |
Correct |
24 ms |
47204 KB |
Output is correct |
4 |
Correct |
26 ms |
47316 KB |
Output is correct |
5 |
Correct |
25 ms |
47256 KB |
Output is correct |
6 |
Correct |
26 ms |
47188 KB |
Output is correct |
7 |
Correct |
26 ms |
47216 KB |
Output is correct |
8 |
Correct |
25 ms |
47252 KB |
Output is correct |
9 |
Correct |
26 ms |
47316 KB |
Output is correct |
10 |
Correct |
26 ms |
47444 KB |
Output is correct |
11 |
Correct |
30 ms |
47548 KB |
Output is correct |
12 |
Correct |
26 ms |
47316 KB |
Output is correct |
13 |
Correct |
25 ms |
47252 KB |
Output is correct |
14 |
Correct |
27 ms |
47572 KB |
Output is correct |
15 |
Correct |
26 ms |
47564 KB |
Output is correct |
16 |
Correct |
29 ms |
47552 KB |
Output is correct |
17 |
Correct |
29 ms |
48596 KB |
Output is correct |
18 |
Correct |
28 ms |
49108 KB |
Output is correct |
19 |
Correct |
27 ms |
48340 KB |
Output is correct |
20 |
Correct |
26 ms |
47464 KB |
Output is correct |
21 |
Correct |
26 ms |
47536 KB |
Output is correct |
22 |
Correct |
29 ms |
48364 KB |
Output is correct |
23 |
Correct |
32 ms |
48808 KB |
Output is correct |
24 |
Correct |
35 ms |
50340 KB |
Output is correct |
25 |
Correct |
27 ms |
47804 KB |
Output is correct |
26 |
Correct |
31 ms |
49700 KB |
Output is correct |
27 |
Correct |
30 ms |
48844 KB |
Output is correct |
28 |
Correct |
35 ms |
50932 KB |
Output is correct |
29 |
Correct |
35 ms |
50548 KB |
Output is correct |
30 |
Correct |
27 ms |
48192 KB |
Output is correct |
31 |
Correct |
29 ms |
48980 KB |
Output is correct |
32 |
Correct |
27 ms |
48468 KB |
Output is correct |
33 |
Correct |
43 ms |
53708 KB |
Output is correct |
34 |
Correct |
44 ms |
53716 KB |
Output is correct |
35 |
Correct |
53 ms |
53684 KB |
Output is correct |
36 |
Correct |
32 ms |
49400 KB |
Output is correct |
37 |
Correct |
72 ms |
57804 KB |
Output is correct |
38 |
Correct |
68 ms |
57528 KB |
Output is correct |
39 |
Correct |
74 ms |
57488 KB |
Output is correct |
40 |
Correct |
68 ms |
57548 KB |
Output is correct |
41 |
Correct |
69 ms |
57636 KB |
Output is correct |
42 |
Correct |
36 ms |
50024 KB |
Output is correct |
43 |
Correct |
32 ms |
49124 KB |
Output is correct |
44 |
Correct |
34 ms |
47680 KB |
Output is correct |
45 |
Correct |
161 ms |
71876 KB |
Output is correct |
46 |
Correct |
161 ms |
71860 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
28 ms |
47272 KB |
Output is correct |
2 |
Correct |
24 ms |
47384 KB |
Output is correct |
3 |
Correct |
24 ms |
47200 KB |
Output is correct |
4 |
Correct |
25 ms |
47188 KB |
Output is correct |
5 |
Correct |
27 ms |
47248 KB |
Output is correct |
6 |
Correct |
24 ms |
47312 KB |
Output is correct |
7 |
Correct |
25 ms |
47256 KB |
Output is correct |
8 |
Correct |
25 ms |
47220 KB |
Output is correct |
9 |
Correct |
25 ms |
47316 KB |
Output is correct |
10 |
Correct |
25 ms |
47360 KB |
Output is correct |
11 |
Correct |
28 ms |
47552 KB |
Output is correct |
12 |
Correct |
28 ms |
47312 KB |
Output is correct |
13 |
Correct |
25 ms |
47268 KB |
Output is correct |
14 |
Correct |
26 ms |
47532 KB |
Output is correct |
15 |
Correct |
31 ms |
47564 KB |
Output is correct |
16 |
Correct |
26 ms |
47488 KB |
Output is correct |
17 |
Correct |
31 ms |
48612 KB |
Output is correct |
18 |
Correct |
28 ms |
49076 KB |
Output is correct |
19 |
Correct |
27 ms |
48372 KB |
Output is correct |
20 |
Correct |
25 ms |
47440 KB |
Output is correct |
21 |
Correct |
25 ms |
47544 KB |
Output is correct |
22 |
Correct |
27 ms |
48404 KB |
Output is correct |
23 |
Correct |
28 ms |
48816 KB |
Output is correct |
24 |
Correct |
33 ms |
50384 KB |
Output is correct |
25 |
Correct |
26 ms |
47840 KB |
Output is correct |
26 |
Correct |
31 ms |
49796 KB |
Output is correct |
27 |
Correct |
28 ms |
48836 KB |
Output is correct |
28 |
Correct |
33 ms |
50900 KB |
Output is correct |
29 |
Correct |
34 ms |
50508 KB |
Output is correct |
30 |
Correct |
29 ms |
48212 KB |
Output is correct |
31 |
Correct |
29 ms |
48956 KB |
Output is correct |
32 |
Correct |
28 ms |
48468 KB |
Output is correct |
33 |
Correct |
45 ms |
53700 KB |
Output is correct |
34 |
Correct |
45 ms |
53716 KB |
Output is correct |
35 |
Correct |
52 ms |
53760 KB |
Output is correct |
36 |
Correct |
31 ms |
49468 KB |
Output is correct |
37 |
Correct |
74 ms |
57876 KB |
Output is correct |
38 |
Correct |
67 ms |
57584 KB |
Output is correct |
39 |
Correct |
69 ms |
57516 KB |
Output is correct |
40 |
Correct |
68 ms |
57652 KB |
Output is correct |
41 |
Correct |
67 ms |
57548 KB |
Output is correct |
42 |
Correct |
35 ms |
49936 KB |
Output is correct |
43 |
Correct |
32 ms |
49128 KB |
Output is correct |
44 |
Correct |
29 ms |
47700 KB |
Output is correct |
45 |
Correct |
161 ms |
71760 KB |
Output is correct |
46 |
Correct |
163 ms |
71860 KB |
Output is correct |
47 |
Correct |
304 ms |
136480 KB |
Output is correct |
48 |
Runtime error |
336 ms |
262144 KB |
Execution killed with signal 11 |
49 |
Halted |
0 ms |
0 KB |
- |