#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<int> adj0[maxC];
vector<int> adj1[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) {
adj1[cnt].emplace_back(cnt + 1);
adj1[cnt + 1].emplace_back(cnt);
}
if (cur == B[i]) {
adj0[B[i]].emplace_back(cnt);
}
adj0[cnt].emplace_back(cur);
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) {
adj1[cnt].emplace_back(cnt + 1);
adj1[cnt + 1].emplace_back(cnt);
}
id[cur] = cnt;
adj0[cnt].emplace_back(cur);
cnt++;
}
}
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]]);
}
}
}
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 v: adj0[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);
}
}
}
if (dist[B[1]] == inf) {
cout << -1;
}
else {
cout << dist[B[1]];
}
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
56 ms |
94152 KB |
Output is correct |
2 |
Correct |
52 ms |
94252 KB |
Output is correct |
3 |
Correct |
45 ms |
94200 KB |
Output is correct |
4 |
Correct |
43 ms |
94252 KB |
Output is correct |
5 |
Correct |
45 ms |
94132 KB |
Output is correct |
6 |
Correct |
44 ms |
94156 KB |
Output is correct |
7 |
Correct |
45 ms |
94152 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
46 ms |
94252 KB |
Output is correct |
2 |
Correct |
48 ms |
94272 KB |
Output is correct |
3 |
Correct |
46 ms |
94256 KB |
Output is correct |
4 |
Correct |
51 ms |
94148 KB |
Output is correct |
5 |
Correct |
51 ms |
94148 KB |
Output is correct |
6 |
Correct |
44 ms |
94180 KB |
Output is correct |
7 |
Correct |
44 ms |
94240 KB |
Output is correct |
8 |
Correct |
50 ms |
94176 KB |
Output is correct |
9 |
Correct |
46 ms |
94292 KB |
Output is correct |
10 |
Correct |
46 ms |
94284 KB |
Output is correct |
11 |
Correct |
50 ms |
94628 KB |
Output is correct |
12 |
Correct |
50 ms |
94308 KB |
Output is correct |
13 |
Correct |
46 ms |
94228 KB |
Output is correct |
14 |
Correct |
45 ms |
94664 KB |
Output is correct |
15 |
Correct |
47 ms |
94700 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
44 ms |
94228 KB |
Output is correct |
2 |
Correct |
49 ms |
94188 KB |
Output is correct |
3 |
Correct |
49 ms |
94260 KB |
Output is correct |
4 |
Correct |
44 ms |
94176 KB |
Output is correct |
5 |
Correct |
47 ms |
94252 KB |
Output is correct |
6 |
Correct |
45 ms |
94256 KB |
Output is correct |
7 |
Correct |
47 ms |
94156 KB |
Output is correct |
8 |
Correct |
46 ms |
94200 KB |
Output is correct |
9 |
Correct |
43 ms |
94164 KB |
Output is correct |
10 |
Correct |
46 ms |
94392 KB |
Output is correct |
11 |
Correct |
46 ms |
94588 KB |
Output is correct |
12 |
Correct |
47 ms |
94264 KB |
Output is correct |
13 |
Correct |
50 ms |
94224 KB |
Output is correct |
14 |
Correct |
47 ms |
94700 KB |
Output is correct |
15 |
Correct |
47 ms |
94688 KB |
Output is correct |
16 |
Correct |
50 ms |
94540 KB |
Output is correct |
17 |
Correct |
61 ms |
96140 KB |
Output is correct |
18 |
Correct |
49 ms |
96676 KB |
Output is correct |
19 |
Correct |
47 ms |
95692 KB |
Output is correct |
20 |
Correct |
45 ms |
94480 KB |
Output is correct |
21 |
Correct |
45 ms |
94452 KB |
Output is correct |
22 |
Correct |
49 ms |
95692 KB |
Output is correct |
23 |
Correct |
51 ms |
96304 KB |
Output is correct |
24 |
Correct |
58 ms |
98320 KB |
Output is correct |
25 |
Correct |
46 ms |
94948 KB |
Output is correct |
26 |
Correct |
52 ms |
97476 KB |
Output is correct |
27 |
Correct |
48 ms |
96340 KB |
Output is correct |
28 |
Correct |
56 ms |
99020 KB |
Output is correct |
29 |
Correct |
62 ms |
98496 KB |
Output is correct |
30 |
Correct |
46 ms |
95440 KB |
Output is correct |
31 |
Correct |
49 ms |
96452 KB |
Output is correct |
32 |
Correct |
48 ms |
95820 KB |
Output is correct |
33 |
Correct |
71 ms |
102708 KB |
Output is correct |
34 |
Correct |
67 ms |
102708 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
45 ms |
94252 KB |
Output is correct |
2 |
Correct |
45 ms |
94156 KB |
Output is correct |
3 |
Correct |
48 ms |
94248 KB |
Output is correct |
4 |
Correct |
44 ms |
94212 KB |
Output is correct |
5 |
Correct |
48 ms |
94228 KB |
Output is correct |
6 |
Correct |
45 ms |
94156 KB |
Output is correct |
7 |
Correct |
50 ms |
94168 KB |
Output is correct |
8 |
Correct |
44 ms |
94140 KB |
Output is correct |
9 |
Correct |
47 ms |
94152 KB |
Output is correct |
10 |
Correct |
45 ms |
94292 KB |
Output is correct |
11 |
Correct |
46 ms |
94552 KB |
Output is correct |
12 |
Correct |
47 ms |
94408 KB |
Output is correct |
13 |
Correct |
44 ms |
94168 KB |
Output is correct |
14 |
Correct |
45 ms |
94624 KB |
Output is correct |
15 |
Correct |
49 ms |
94668 KB |
Output is correct |
16 |
Correct |
50 ms |
94612 KB |
Output is correct |
17 |
Correct |
51 ms |
96204 KB |
Output is correct |
18 |
Correct |
52 ms |
96716 KB |
Output is correct |
19 |
Correct |
47 ms |
95672 KB |
Output is correct |
20 |
Correct |
46 ms |
94408 KB |
Output is correct |
21 |
Correct |
46 ms |
94516 KB |
Output is correct |
22 |
Correct |
49 ms |
95788 KB |
Output is correct |
23 |
Correct |
50 ms |
96196 KB |
Output is correct |
24 |
Correct |
57 ms |
98296 KB |
Output is correct |
25 |
Correct |
46 ms |
94848 KB |
Output is correct |
26 |
Correct |
56 ms |
97516 KB |
Output is correct |
27 |
Correct |
50 ms |
96376 KB |
Output is correct |
28 |
Correct |
56 ms |
99020 KB |
Output is correct |
29 |
Correct |
60 ms |
98536 KB |
Output is correct |
30 |
Correct |
49 ms |
95396 KB |
Output is correct |
31 |
Correct |
54 ms |
96464 KB |
Output is correct |
32 |
Correct |
49 ms |
95820 KB |
Output is correct |
33 |
Correct |
72 ms |
102744 KB |
Output is correct |
34 |
Correct |
71 ms |
102704 KB |
Output is correct |
35 |
Correct |
74 ms |
102760 KB |
Output is correct |
36 |
Correct |
51 ms |
97132 KB |
Output is correct |
37 |
Correct |
96 ms |
108616 KB |
Output is correct |
38 |
Correct |
103 ms |
108124 KB |
Output is correct |
39 |
Correct |
105 ms |
108264 KB |
Output is correct |
40 |
Correct |
97 ms |
108168 KB |
Output is correct |
41 |
Correct |
101 ms |
108224 KB |
Output is correct |
42 |
Correct |
72 ms |
97680 KB |
Output is correct |
43 |
Correct |
61 ms |
96588 KB |
Output is correct |
44 |
Correct |
49 ms |
94620 KB |
Output is correct |
45 |
Correct |
195 ms |
127208 KB |
Output is correct |
46 |
Correct |
195 ms |
127236 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
47 ms |
94244 KB |
Output is correct |
2 |
Correct |
56 ms |
94236 KB |
Output is correct |
3 |
Correct |
45 ms |
94156 KB |
Output is correct |
4 |
Correct |
45 ms |
94348 KB |
Output is correct |
5 |
Correct |
47 ms |
94172 KB |
Output is correct |
6 |
Correct |
48 ms |
94304 KB |
Output is correct |
7 |
Correct |
48 ms |
94192 KB |
Output is correct |
8 |
Correct |
50 ms |
94220 KB |
Output is correct |
9 |
Correct |
46 ms |
94156 KB |
Output is correct |
10 |
Correct |
45 ms |
94392 KB |
Output is correct |
11 |
Correct |
46 ms |
94776 KB |
Output is correct |
12 |
Correct |
45 ms |
94252 KB |
Output is correct |
13 |
Correct |
44 ms |
94292 KB |
Output is correct |
14 |
Correct |
48 ms |
94668 KB |
Output is correct |
15 |
Correct |
48 ms |
94624 KB |
Output is correct |
16 |
Correct |
48 ms |
94592 KB |
Output is correct |
17 |
Correct |
53 ms |
96132 KB |
Output is correct |
18 |
Correct |
69 ms |
96688 KB |
Output is correct |
19 |
Correct |
57 ms |
95692 KB |
Output is correct |
20 |
Correct |
48 ms |
94364 KB |
Output is correct |
21 |
Correct |
46 ms |
94572 KB |
Output is correct |
22 |
Correct |
47 ms |
95692 KB |
Output is correct |
23 |
Correct |
52 ms |
96400 KB |
Output is correct |
24 |
Correct |
54 ms |
98308 KB |
Output is correct |
25 |
Correct |
49 ms |
94924 KB |
Output is correct |
26 |
Correct |
52 ms |
97560 KB |
Output is correct |
27 |
Correct |
51 ms |
96268 KB |
Output is correct |
28 |
Correct |
58 ms |
99020 KB |
Output is correct |
29 |
Correct |
58 ms |
98512 KB |
Output is correct |
30 |
Correct |
51 ms |
95444 KB |
Output is correct |
31 |
Correct |
52 ms |
96460 KB |
Output is correct |
32 |
Correct |
52 ms |
95820 KB |
Output is correct |
33 |
Correct |
68 ms |
102732 KB |
Output is correct |
34 |
Correct |
69 ms |
102680 KB |
Output is correct |
35 |
Correct |
75 ms |
102756 KB |
Output is correct |
36 |
Correct |
52 ms |
97228 KB |
Output is correct |
37 |
Correct |
99 ms |
108700 KB |
Output is correct |
38 |
Correct |
97 ms |
108196 KB |
Output is correct |
39 |
Correct |
94 ms |
108196 KB |
Output is correct |
40 |
Correct |
103 ms |
108260 KB |
Output is correct |
41 |
Correct |
98 ms |
108376 KB |
Output is correct |
42 |
Correct |
56 ms |
97844 KB |
Output is correct |
43 |
Correct |
56 ms |
96592 KB |
Output is correct |
44 |
Correct |
54 ms |
94672 KB |
Output is correct |
45 |
Correct |
197 ms |
127228 KB |
Output is correct |
46 |
Correct |
199 ms |
127368 KB |
Output is correct |
47 |
Correct |
391 ms |
211888 KB |
Output is correct |
48 |
Runtime error |
481 ms |
262144 KB |
Execution killed with signal 11 |
49 |
Halted |
0 ms |
0 KB |
- |