#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();
if (u == B[1]) {
cout << dist[u];
return;
}
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);
}
}
}
cout << -1;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
51 ms |
94136 KB |
Output is correct |
2 |
Correct |
45 ms |
94256 KB |
Output is correct |
3 |
Correct |
53 ms |
94252 KB |
Output is correct |
4 |
Correct |
44 ms |
94144 KB |
Output is correct |
5 |
Correct |
46 ms |
94252 KB |
Output is correct |
6 |
Correct |
45 ms |
94156 KB |
Output is correct |
7 |
Correct |
44 ms |
94164 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
47 ms |
94156 KB |
Output is correct |
2 |
Correct |
46 ms |
94156 KB |
Output is correct |
3 |
Correct |
49 ms |
94228 KB |
Output is correct |
4 |
Correct |
45 ms |
94140 KB |
Output is correct |
5 |
Correct |
43 ms |
94192 KB |
Output is correct |
6 |
Correct |
46 ms |
94236 KB |
Output is correct |
7 |
Correct |
46 ms |
94208 KB |
Output is correct |
8 |
Correct |
47 ms |
94268 KB |
Output is correct |
9 |
Correct |
48 ms |
94272 KB |
Output is correct |
10 |
Correct |
47 ms |
94312 KB |
Output is correct |
11 |
Correct |
48 ms |
94540 KB |
Output is correct |
12 |
Correct |
44 ms |
94204 KB |
Output is correct |
13 |
Correct |
51 ms |
94264 KB |
Output is correct |
14 |
Correct |
51 ms |
94632 KB |
Output is correct |
15 |
Correct |
46 ms |
94636 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
48 ms |
94148 KB |
Output is correct |
2 |
Correct |
44 ms |
94144 KB |
Output is correct |
3 |
Correct |
46 ms |
94144 KB |
Output is correct |
4 |
Correct |
45 ms |
94156 KB |
Output is correct |
5 |
Correct |
47 ms |
94208 KB |
Output is correct |
6 |
Correct |
49 ms |
94208 KB |
Output is correct |
7 |
Correct |
46 ms |
94196 KB |
Output is correct |
8 |
Correct |
44 ms |
94160 KB |
Output is correct |
9 |
Correct |
44 ms |
94208 KB |
Output is correct |
10 |
Correct |
46 ms |
94360 KB |
Output is correct |
11 |
Correct |
48 ms |
94644 KB |
Output is correct |
12 |
Correct |
44 ms |
94284 KB |
Output is correct |
13 |
Correct |
45 ms |
94184 KB |
Output is correct |
14 |
Correct |
46 ms |
94676 KB |
Output is correct |
15 |
Correct |
45 ms |
94684 KB |
Output is correct |
16 |
Correct |
46 ms |
94612 KB |
Output is correct |
17 |
Correct |
48 ms |
96076 KB |
Output is correct |
18 |
Correct |
50 ms |
96716 KB |
Output is correct |
19 |
Correct |
49 ms |
95688 KB |
Output is correct |
20 |
Correct |
47 ms |
94444 KB |
Output is correct |
21 |
Correct |
51 ms |
94540 KB |
Output is correct |
22 |
Correct |
47 ms |
95772 KB |
Output is correct |
23 |
Correct |
49 ms |
96280 KB |
Output is correct |
24 |
Correct |
58 ms |
98268 KB |
Output is correct |
25 |
Correct |
56 ms |
94864 KB |
Output is correct |
26 |
Correct |
54 ms |
97516 KB |
Output is correct |
27 |
Correct |
53 ms |
96376 KB |
Output is correct |
28 |
Correct |
55 ms |
98968 KB |
Output is correct |
29 |
Correct |
61 ms |
98548 KB |
Output is correct |
30 |
Correct |
58 ms |
95392 KB |
Output is correct |
31 |
Correct |
53 ms |
96432 KB |
Output is correct |
32 |
Correct |
49 ms |
95748 KB |
Output is correct |
33 |
Correct |
80 ms |
102628 KB |
Output is correct |
34 |
Correct |
64 ms |
102696 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
44 ms |
94136 KB |
Output is correct |
2 |
Correct |
46 ms |
94152 KB |
Output is correct |
3 |
Correct |
45 ms |
94172 KB |
Output is correct |
4 |
Correct |
48 ms |
94220 KB |
Output is correct |
5 |
Correct |
46 ms |
94180 KB |
Output is correct |
6 |
Correct |
49 ms |
94156 KB |
Output is correct |
7 |
Correct |
53 ms |
94152 KB |
Output is correct |
8 |
Correct |
46 ms |
94156 KB |
Output is correct |
9 |
Correct |
45 ms |
94272 KB |
Output is correct |
10 |
Correct |
50 ms |
94284 KB |
Output is correct |
11 |
Correct |
46 ms |
94648 KB |
Output is correct |
12 |
Correct |
44 ms |
94260 KB |
Output is correct |
13 |
Correct |
54 ms |
94240 KB |
Output is correct |
14 |
Correct |
53 ms |
94796 KB |
Output is correct |
15 |
Correct |
46 ms |
94668 KB |
Output is correct |
16 |
Correct |
46 ms |
94604 KB |
Output is correct |
17 |
Correct |
53 ms |
96076 KB |
Output is correct |
18 |
Correct |
54 ms |
96664 KB |
Output is correct |
19 |
Correct |
49 ms |
95700 KB |
Output is correct |
20 |
Correct |
48 ms |
94412 KB |
Output is correct |
21 |
Correct |
45 ms |
94600 KB |
Output is correct |
22 |
Correct |
49 ms |
95824 KB |
Output is correct |
23 |
Correct |
56 ms |
96204 KB |
Output is correct |
24 |
Correct |
56 ms |
98288 KB |
Output is correct |
25 |
Correct |
50 ms |
94968 KB |
Output is correct |
26 |
Correct |
53 ms |
97548 KB |
Output is correct |
27 |
Correct |
57 ms |
96332 KB |
Output is correct |
28 |
Correct |
63 ms |
99028 KB |
Output is correct |
29 |
Correct |
65 ms |
98508 KB |
Output is correct |
30 |
Correct |
49 ms |
95480 KB |
Output is correct |
31 |
Correct |
52 ms |
96548 KB |
Output is correct |
32 |
Correct |
54 ms |
95820 KB |
Output is correct |
33 |
Correct |
70 ms |
102736 KB |
Output is correct |
34 |
Correct |
75 ms |
102732 KB |
Output is correct |
35 |
Correct |
69 ms |
102860 KB |
Output is correct |
36 |
Correct |
54 ms |
97020 KB |
Output is correct |
37 |
Correct |
85 ms |
108664 KB |
Output is correct |
38 |
Correct |
77 ms |
108136 KB |
Output is correct |
39 |
Correct |
87 ms |
107980 KB |
Output is correct |
40 |
Correct |
82 ms |
108136 KB |
Output is correct |
41 |
Correct |
84 ms |
108180 KB |
Output is correct |
42 |
Correct |
66 ms |
97768 KB |
Output is correct |
43 |
Correct |
57 ms |
96496 KB |
Output is correct |
44 |
Correct |
62 ms |
94700 KB |
Output is correct |
45 |
Correct |
206 ms |
127244 KB |
Output is correct |
46 |
Correct |
174 ms |
127360 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
55 ms |
94168 KB |
Output is correct |
2 |
Correct |
50 ms |
94228 KB |
Output is correct |
3 |
Correct |
58 ms |
94252 KB |
Output is correct |
4 |
Correct |
51 ms |
94268 KB |
Output is correct |
5 |
Correct |
45 ms |
94136 KB |
Output is correct |
6 |
Correct |
51 ms |
94136 KB |
Output is correct |
7 |
Correct |
46 ms |
94240 KB |
Output is correct |
8 |
Correct |
47 ms |
94176 KB |
Output is correct |
9 |
Correct |
47 ms |
94332 KB |
Output is correct |
10 |
Correct |
48 ms |
94312 KB |
Output is correct |
11 |
Correct |
46 ms |
94540 KB |
Output is correct |
12 |
Correct |
45 ms |
94256 KB |
Output is correct |
13 |
Correct |
47 ms |
94236 KB |
Output is correct |
14 |
Correct |
50 ms |
94664 KB |
Output is correct |
15 |
Correct |
47 ms |
94668 KB |
Output is correct |
16 |
Correct |
48 ms |
94548 KB |
Output is correct |
17 |
Correct |
50 ms |
96076 KB |
Output is correct |
18 |
Correct |
50 ms |
96644 KB |
Output is correct |
19 |
Correct |
47 ms |
95648 KB |
Output is correct |
20 |
Correct |
46 ms |
94424 KB |
Output is correct |
21 |
Correct |
47 ms |
94512 KB |
Output is correct |
22 |
Correct |
54 ms |
95688 KB |
Output is correct |
23 |
Correct |
52 ms |
96204 KB |
Output is correct |
24 |
Correct |
56 ms |
98252 KB |
Output is correct |
25 |
Correct |
49 ms |
94912 KB |
Output is correct |
26 |
Correct |
52 ms |
97560 KB |
Output is correct |
27 |
Correct |
49 ms |
96340 KB |
Output is correct |
28 |
Correct |
53 ms |
98984 KB |
Output is correct |
29 |
Correct |
57 ms |
98548 KB |
Output is correct |
30 |
Correct |
50 ms |
95396 KB |
Output is correct |
31 |
Correct |
54 ms |
96480 KB |
Output is correct |
32 |
Correct |
48 ms |
95880 KB |
Output is correct |
33 |
Correct |
71 ms |
102672 KB |
Output is correct |
34 |
Correct |
70 ms |
102752 KB |
Output is correct |
35 |
Correct |
69 ms |
102796 KB |
Output is correct |
36 |
Correct |
56 ms |
97124 KB |
Output is correct |
37 |
Correct |
90 ms |
108548 KB |
Output is correct |
38 |
Correct |
82 ms |
108088 KB |
Output is correct |
39 |
Correct |
79 ms |
107996 KB |
Output is correct |
40 |
Correct |
79 ms |
108080 KB |
Output is correct |
41 |
Correct |
79 ms |
108212 KB |
Output is correct |
42 |
Correct |
61 ms |
97708 KB |
Output is correct |
43 |
Correct |
58 ms |
96520 KB |
Output is correct |
44 |
Correct |
50 ms |
94668 KB |
Output is correct |
45 |
Correct |
190 ms |
127244 KB |
Output is correct |
46 |
Correct |
166 ms |
127204 KB |
Output is correct |
47 |
Correct |
280 ms |
211792 KB |
Output is correct |
48 |
Runtime error |
459 ms |
262144 KB |
Execution killed with signal 11 |
49 |
Halted |
0 ms |
0 KB |
- |