#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 = 4e6 + 20;
const int inf = 1e9 + 20;
int B[maxN];
int P[maxN];
vector<int> adj0[maxN];
vector<int> adj1[maxC];
int dist[maxC];
int pos[maxC];
bool flag[maxN];
int id[maxN];
void just_do_it() {
fill_n(pos, maxC, -1);
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) {
adj1[cnt].emplace_back(cnt + 1);
adj1[cnt + 1].emplace_back(cnt);
}
if (cur == B[i]) {
adj0[B[i]].emplace_back(cnt);
}
pos[cnt] = cur;
cnt++;
if (cnt == maxC) {
exit(0);
}
}
}
}
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) {
adj1[cnt].emplace_back(cnt + 1);
adj1[cnt + 1].emplace_back(cnt);
}
id[cur] = cnt;
pos[cnt] = cur;
cnt++;
if (cnt == maxC) {
exit(0);
}
}
}
for (int i = 0; i < M; i++) {
if (P[i] == d && !flag[B[i]]) {
flag[B[i]] = true;
adj0[B[i]].emplace_back(id[B[i]]);
}
}
}
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();
if (u == B[1]) {
cout << dist[u];
return;
}
q.pop_front();
if (u < N) {
for (auto v: adj0[u]) {
if (dist[u] < dist[v]) {
dist[v] = dist[u];
q.push_front(v);
}
}
}
else if (pos[u] != -1) {
int v = pos[u];
if (dist[u] < dist[v]) {
dist[v] = dist[u];
q.push_front(v);
}
}
for (auto v: adj1[u]) {
if (dist[u] + 1 < dist[v]) {
dist[v] = dist[u] + 1;
q.push_back(v);
}
}
}
cout << -1;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
52 ms |
110548 KB |
Output is correct |
2 |
Correct |
50 ms |
110520 KB |
Output is correct |
3 |
Correct |
54 ms |
110500 KB |
Output is correct |
4 |
Correct |
50 ms |
110576 KB |
Output is correct |
5 |
Correct |
50 ms |
110600 KB |
Output is correct |
6 |
Correct |
51 ms |
110596 KB |
Output is correct |
7 |
Correct |
57 ms |
110544 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
52 ms |
110540 KB |
Output is correct |
2 |
Correct |
52 ms |
110620 KB |
Output is correct |
3 |
Correct |
51 ms |
110620 KB |
Output is correct |
4 |
Correct |
53 ms |
110540 KB |
Output is correct |
5 |
Correct |
53 ms |
110616 KB |
Output is correct |
6 |
Correct |
54 ms |
110508 KB |
Output is correct |
7 |
Correct |
55 ms |
110612 KB |
Output is correct |
8 |
Correct |
53 ms |
110544 KB |
Output is correct |
9 |
Correct |
60 ms |
110656 KB |
Output is correct |
10 |
Correct |
51 ms |
110580 KB |
Output is correct |
11 |
Correct |
55 ms |
110752 KB |
Output is correct |
12 |
Correct |
55 ms |
110628 KB |
Output is correct |
13 |
Correct |
53 ms |
110584 KB |
Output is correct |
14 |
Correct |
56 ms |
110872 KB |
Output is correct |
15 |
Correct |
55 ms |
110796 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
52 ms |
110684 KB |
Output is correct |
2 |
Correct |
55 ms |
110576 KB |
Output is correct |
3 |
Correct |
53 ms |
110616 KB |
Output is correct |
4 |
Correct |
52 ms |
110520 KB |
Output is correct |
5 |
Correct |
63 ms |
110616 KB |
Output is correct |
6 |
Correct |
55 ms |
110540 KB |
Output is correct |
7 |
Correct |
56 ms |
110620 KB |
Output is correct |
8 |
Correct |
52 ms |
110548 KB |
Output is correct |
9 |
Correct |
52 ms |
110632 KB |
Output is correct |
10 |
Correct |
55 ms |
110616 KB |
Output is correct |
11 |
Correct |
61 ms |
110744 KB |
Output is correct |
12 |
Correct |
56 ms |
110684 KB |
Output is correct |
13 |
Correct |
56 ms |
110644 KB |
Output is correct |
14 |
Correct |
56 ms |
110848 KB |
Output is correct |
15 |
Correct |
55 ms |
110796 KB |
Output is correct |
16 |
Correct |
53 ms |
110744 KB |
Output is correct |
17 |
Correct |
54 ms |
111564 KB |
Output is correct |
18 |
Correct |
60 ms |
111952 KB |
Output is correct |
19 |
Correct |
59 ms |
111440 KB |
Output is correct |
20 |
Correct |
55 ms |
110668 KB |
Output is correct |
21 |
Correct |
51 ms |
110756 KB |
Output is correct |
22 |
Correct |
54 ms |
111416 KB |
Output is correct |
23 |
Correct |
54 ms |
111724 KB |
Output is correct |
24 |
Correct |
64 ms |
112808 KB |
Output is correct |
25 |
Correct |
52 ms |
110984 KB |
Output is correct |
26 |
Correct |
55 ms |
112284 KB |
Output is correct |
27 |
Correct |
58 ms |
111740 KB |
Output is correct |
28 |
Correct |
58 ms |
113164 KB |
Output is correct |
29 |
Correct |
74 ms |
112872 KB |
Output is correct |
30 |
Correct |
56 ms |
111296 KB |
Output is correct |
31 |
Correct |
60 ms |
111844 KB |
Output is correct |
32 |
Correct |
56 ms |
111484 KB |
Output is correct |
33 |
Correct |
70 ms |
115108 KB |
Output is correct |
34 |
Correct |
66 ms |
115052 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
55 ms |
110600 KB |
Output is correct |
2 |
Correct |
66 ms |
110612 KB |
Output is correct |
3 |
Correct |
59 ms |
110620 KB |
Output is correct |
4 |
Correct |
57 ms |
110544 KB |
Output is correct |
5 |
Correct |
58 ms |
110540 KB |
Output is correct |
6 |
Correct |
58 ms |
110544 KB |
Output is correct |
7 |
Correct |
54 ms |
110668 KB |
Output is correct |
8 |
Correct |
53 ms |
110512 KB |
Output is correct |
9 |
Correct |
55 ms |
110540 KB |
Output is correct |
10 |
Correct |
61 ms |
110696 KB |
Output is correct |
11 |
Correct |
56 ms |
110780 KB |
Output is correct |
12 |
Correct |
53 ms |
110588 KB |
Output is correct |
13 |
Correct |
52 ms |
110648 KB |
Output is correct |
14 |
Correct |
52 ms |
110768 KB |
Output is correct |
15 |
Correct |
56 ms |
110804 KB |
Output is correct |
16 |
Correct |
54 ms |
110696 KB |
Output is correct |
17 |
Correct |
58 ms |
111556 KB |
Output is correct |
18 |
Correct |
59 ms |
111940 KB |
Output is correct |
19 |
Correct |
54 ms |
111552 KB |
Output is correct |
20 |
Correct |
59 ms |
110904 KB |
Output is correct |
21 |
Correct |
57 ms |
110664 KB |
Output is correct |
22 |
Correct |
57 ms |
111432 KB |
Output is correct |
23 |
Correct |
57 ms |
111720 KB |
Output is correct |
24 |
Correct |
59 ms |
112756 KB |
Output is correct |
25 |
Correct |
58 ms |
110964 KB |
Output is correct |
26 |
Correct |
65 ms |
112380 KB |
Output is correct |
27 |
Correct |
60 ms |
111648 KB |
Output is correct |
28 |
Correct |
61 ms |
113100 KB |
Output is correct |
29 |
Correct |
64 ms |
112904 KB |
Output is correct |
30 |
Correct |
59 ms |
111268 KB |
Output is correct |
31 |
Correct |
64 ms |
111848 KB |
Output is correct |
32 |
Correct |
65 ms |
111464 KB |
Output is correct |
33 |
Correct |
70 ms |
115144 KB |
Output is correct |
34 |
Correct |
72 ms |
115144 KB |
Output is correct |
35 |
Correct |
70 ms |
115172 KB |
Output is correct |
36 |
Correct |
61 ms |
112032 KB |
Output is correct |
37 |
Correct |
80 ms |
118504 KB |
Output is correct |
38 |
Correct |
82 ms |
118052 KB |
Output is correct |
39 |
Correct |
74 ms |
117964 KB |
Output is correct |
40 |
Correct |
79 ms |
118052 KB |
Output is correct |
41 |
Correct |
83 ms |
118124 KB |
Output is correct |
42 |
Correct |
65 ms |
112600 KB |
Output is correct |
43 |
Correct |
60 ms |
111872 KB |
Output is correct |
44 |
Correct |
58 ms |
111004 KB |
Output is correct |
45 |
Correct |
156 ms |
128372 KB |
Output is correct |
46 |
Correct |
155 ms |
128316 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
53 ms |
110620 KB |
Output is correct |
2 |
Correct |
54 ms |
110604 KB |
Output is correct |
3 |
Correct |
68 ms |
110540 KB |
Output is correct |
4 |
Correct |
62 ms |
110516 KB |
Output is correct |
5 |
Correct |
55 ms |
110544 KB |
Output is correct |
6 |
Correct |
53 ms |
110584 KB |
Output is correct |
7 |
Correct |
52 ms |
110580 KB |
Output is correct |
8 |
Correct |
56 ms |
110540 KB |
Output is correct |
9 |
Correct |
56 ms |
110528 KB |
Output is correct |
10 |
Correct |
56 ms |
110704 KB |
Output is correct |
11 |
Correct |
53 ms |
110836 KB |
Output is correct |
12 |
Correct |
54 ms |
110632 KB |
Output is correct |
13 |
Correct |
52 ms |
110620 KB |
Output is correct |
14 |
Correct |
55 ms |
110852 KB |
Output is correct |
15 |
Correct |
60 ms |
110844 KB |
Output is correct |
16 |
Correct |
56 ms |
110704 KB |
Output is correct |
17 |
Correct |
55 ms |
111564 KB |
Output is correct |
18 |
Correct |
62 ms |
111960 KB |
Output is correct |
19 |
Correct |
53 ms |
111372 KB |
Output is correct |
20 |
Correct |
55 ms |
110720 KB |
Output is correct |
21 |
Correct |
64 ms |
110756 KB |
Output is correct |
22 |
Correct |
65 ms |
111436 KB |
Output is correct |
23 |
Correct |
57 ms |
111752 KB |
Output is correct |
24 |
Correct |
63 ms |
112732 KB |
Output is correct |
25 |
Correct |
55 ms |
110924 KB |
Output is correct |
26 |
Correct |
58 ms |
112284 KB |
Output is correct |
27 |
Correct |
57 ms |
111736 KB |
Output is correct |
28 |
Correct |
63 ms |
113168 KB |
Output is correct |
29 |
Correct |
63 ms |
112796 KB |
Output is correct |
30 |
Correct |
58 ms |
111260 KB |
Output is correct |
31 |
Correct |
59 ms |
111844 KB |
Output is correct |
32 |
Correct |
61 ms |
111396 KB |
Output is correct |
33 |
Correct |
78 ms |
115020 KB |
Output is correct |
34 |
Correct |
71 ms |
115040 KB |
Output is correct |
35 |
Correct |
74 ms |
115204 KB |
Output is correct |
36 |
Correct |
56 ms |
112132 KB |
Output is correct |
37 |
Correct |
75 ms |
118336 KB |
Output is correct |
38 |
Correct |
76 ms |
118104 KB |
Output is correct |
39 |
Correct |
75 ms |
117964 KB |
Output is correct |
40 |
Correct |
86 ms |
118032 KB |
Output is correct |
41 |
Correct |
88 ms |
118056 KB |
Output is correct |
42 |
Correct |
61 ms |
112524 KB |
Output is correct |
43 |
Correct |
59 ms |
111972 KB |
Output is correct |
44 |
Correct |
55 ms |
110912 KB |
Output is correct |
45 |
Correct |
200 ms |
128244 KB |
Output is correct |
46 |
Correct |
152 ms |
128340 KB |
Output is correct |
47 |
Correct |
203 ms |
173208 KB |
Output is correct |
48 |
Correct |
256 ms |
192012 KB |
Output is correct |
49 |
Correct |
204 ms |
176244 KB |
Output is correct |
50 |
Correct |
242 ms |
177620 KB |
Output is correct |
51 |
Correct |
333 ms |
232088 KB |
Output is correct |
52 |
Correct |
366 ms |
247392 KB |
Output is correct |
53 |
Correct |
69 ms |
115648 KB |
Output is correct |
54 |
Correct |
56 ms |
111864 KB |
Output is correct |
55 |
Correct |
65 ms |
113980 KB |
Output is correct |
56 |
Correct |
68 ms |
113224 KB |
Output is correct |
57 |
Correct |
94 ms |
126836 KB |
Output is correct |
58 |
Correct |
88 ms |
124868 KB |
Output is correct |
59 |
Correct |
137 ms |
146224 KB |
Output is correct |
60 |
Correct |
259 ms |
205212 KB |
Output is correct |
61 |
Correct |
152 ms |
155340 KB |
Output is correct |
62 |
Correct |
272 ms |
205188 KB |
Output is correct |
63 |
Correct |
586 ms |
192024 KB |
Output is correct |
64 |
Correct |
787 ms |
210268 KB |
Output is correct |
65 |
Incorrect |
385 ms |
235728 KB |
Output isn't correct |
66 |
Halted |
0 ms |
0 KB |
- |