#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 = 5e6 + 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;
}
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 |
58 ms |
117736 KB |
Output is correct |
2 |
Correct |
62 ms |
117676 KB |
Output is correct |
3 |
Correct |
56 ms |
117736 KB |
Output is correct |
4 |
Correct |
59 ms |
117792 KB |
Output is correct |
5 |
Correct |
59 ms |
117636 KB |
Output is correct |
6 |
Correct |
57 ms |
117720 KB |
Output is correct |
7 |
Correct |
64 ms |
117700 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
58 ms |
117668 KB |
Output is correct |
2 |
Correct |
55 ms |
117732 KB |
Output is correct |
3 |
Correct |
59 ms |
117688 KB |
Output is correct |
4 |
Correct |
54 ms |
117648 KB |
Output is correct |
5 |
Correct |
58 ms |
117720 KB |
Output is correct |
6 |
Correct |
57 ms |
117708 KB |
Output is correct |
7 |
Correct |
56 ms |
117716 KB |
Output is correct |
8 |
Correct |
58 ms |
117648 KB |
Output is correct |
9 |
Correct |
59 ms |
117808 KB |
Output is correct |
10 |
Correct |
56 ms |
117784 KB |
Output is correct |
11 |
Correct |
56 ms |
117900 KB |
Output is correct |
12 |
Correct |
57 ms |
117772 KB |
Output is correct |
13 |
Correct |
57 ms |
117688 KB |
Output is correct |
14 |
Correct |
58 ms |
117964 KB |
Output is correct |
15 |
Correct |
58 ms |
117964 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
58 ms |
117652 KB |
Output is correct |
2 |
Correct |
55 ms |
117696 KB |
Output is correct |
3 |
Correct |
57 ms |
117632 KB |
Output is correct |
4 |
Correct |
57 ms |
117736 KB |
Output is correct |
5 |
Correct |
55 ms |
117740 KB |
Output is correct |
6 |
Correct |
56 ms |
117740 KB |
Output is correct |
7 |
Correct |
57 ms |
117708 KB |
Output is correct |
8 |
Correct |
58 ms |
117724 KB |
Output is correct |
9 |
Correct |
57 ms |
117664 KB |
Output is correct |
10 |
Correct |
58 ms |
117756 KB |
Output is correct |
11 |
Correct |
57 ms |
118028 KB |
Output is correct |
12 |
Correct |
56 ms |
117796 KB |
Output is correct |
13 |
Correct |
58 ms |
117788 KB |
Output is correct |
14 |
Correct |
57 ms |
118048 KB |
Output is correct |
15 |
Correct |
57 ms |
117964 KB |
Output is correct |
16 |
Correct |
60 ms |
117944 KB |
Output is correct |
17 |
Correct |
61 ms |
119104 KB |
Output is correct |
18 |
Correct |
65 ms |
121528 KB |
Output is correct |
19 |
Correct |
65 ms |
122224 KB |
Output is correct |
20 |
Correct |
67 ms |
122220 KB |
Output is correct |
21 |
Correct |
60 ms |
118140 KB |
Output is correct |
22 |
Correct |
68 ms |
121584 KB |
Output is correct |
23 |
Correct |
64 ms |
121028 KB |
Output is correct |
24 |
Correct |
67 ms |
122180 KB |
Output is correct |
25 |
Correct |
67 ms |
122412 KB |
Output is correct |
26 |
Correct |
70 ms |
122380 KB |
Output is correct |
27 |
Correct |
68 ms |
122172 KB |
Output is correct |
28 |
Correct |
71 ms |
122644 KB |
Output is correct |
29 |
Correct |
69 ms |
122140 KB |
Output is correct |
30 |
Correct |
68 ms |
122128 KB |
Output is correct |
31 |
Correct |
67 ms |
122324 KB |
Output is correct |
32 |
Correct |
69 ms |
122748 KB |
Output is correct |
33 |
Correct |
76 ms |
124108 KB |
Output is correct |
34 |
Correct |
78 ms |
124268 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
58 ms |
117736 KB |
Output is correct |
2 |
Correct |
56 ms |
117732 KB |
Output is correct |
3 |
Correct |
56 ms |
117716 KB |
Output is correct |
4 |
Correct |
58 ms |
117736 KB |
Output is correct |
5 |
Correct |
61 ms |
117724 KB |
Output is correct |
6 |
Correct |
57 ms |
117676 KB |
Output is correct |
7 |
Correct |
60 ms |
117708 KB |
Output is correct |
8 |
Correct |
57 ms |
117652 KB |
Output is correct |
9 |
Correct |
58 ms |
117760 KB |
Output is correct |
10 |
Correct |
58 ms |
117804 KB |
Output is correct |
11 |
Correct |
58 ms |
117964 KB |
Output is correct |
12 |
Correct |
57 ms |
117740 KB |
Output is correct |
13 |
Correct |
58 ms |
117708 KB |
Output is correct |
14 |
Correct |
58 ms |
118048 KB |
Output is correct |
15 |
Correct |
58 ms |
117988 KB |
Output is correct |
16 |
Correct |
57 ms |
117996 KB |
Output is correct |
17 |
Correct |
59 ms |
119140 KB |
Output is correct |
18 |
Correct |
66 ms |
121500 KB |
Output is correct |
19 |
Correct |
66 ms |
122216 KB |
Output is correct |
20 |
Correct |
68 ms |
122176 KB |
Output is correct |
21 |
Correct |
61 ms |
118204 KB |
Output is correct |
22 |
Correct |
67 ms |
121640 KB |
Output is correct |
23 |
Correct |
72 ms |
120984 KB |
Output is correct |
24 |
Correct |
68 ms |
122176 KB |
Output is correct |
25 |
Correct |
67 ms |
122324 KB |
Output is correct |
26 |
Correct |
71 ms |
122376 KB |
Output is correct |
27 |
Correct |
68 ms |
122180 KB |
Output is correct |
28 |
Correct |
68 ms |
122656 KB |
Output is correct |
29 |
Correct |
70 ms |
122180 KB |
Output is correct |
30 |
Correct |
67 ms |
122204 KB |
Output is correct |
31 |
Correct |
70 ms |
122308 KB |
Output is correct |
32 |
Correct |
68 ms |
122700 KB |
Output is correct |
33 |
Correct |
76 ms |
124076 KB |
Output is correct |
34 |
Correct |
76 ms |
124168 KB |
Output is correct |
35 |
Correct |
87 ms |
124144 KB |
Output is correct |
36 |
Correct |
65 ms |
120104 KB |
Output is correct |
37 |
Correct |
99 ms |
128460 KB |
Output is correct |
38 |
Correct |
110 ms |
128028 KB |
Output is correct |
39 |
Correct |
110 ms |
127960 KB |
Output is correct |
40 |
Correct |
104 ms |
128220 KB |
Output is correct |
41 |
Correct |
101 ms |
128096 KB |
Output is correct |
42 |
Correct |
70 ms |
122572 KB |
Output is correct |
43 |
Correct |
71 ms |
122448 KB |
Output is correct |
44 |
Correct |
78 ms |
122496 KB |
Output is correct |
45 |
Correct |
191 ms |
142308 KB |
Output is correct |
46 |
Correct |
189 ms |
142268 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
57 ms |
117668 KB |
Output is correct |
2 |
Correct |
58 ms |
117696 KB |
Output is correct |
3 |
Correct |
58 ms |
117708 KB |
Output is correct |
4 |
Correct |
57 ms |
117744 KB |
Output is correct |
5 |
Correct |
61 ms |
117688 KB |
Output is correct |
6 |
Correct |
67 ms |
117736 KB |
Output is correct |
7 |
Correct |
62 ms |
117704 KB |
Output is correct |
8 |
Correct |
57 ms |
117676 KB |
Output is correct |
9 |
Correct |
57 ms |
117756 KB |
Output is correct |
10 |
Correct |
57 ms |
117812 KB |
Output is correct |
11 |
Correct |
59 ms |
118004 KB |
Output is correct |
12 |
Correct |
57 ms |
117684 KB |
Output is correct |
13 |
Correct |
58 ms |
117732 KB |
Output is correct |
14 |
Correct |
59 ms |
118052 KB |
Output is correct |
15 |
Correct |
59 ms |
118048 KB |
Output is correct |
16 |
Correct |
57 ms |
117964 KB |
Output is correct |
17 |
Correct |
62 ms |
119116 KB |
Output is correct |
18 |
Correct |
72 ms |
121572 KB |
Output is correct |
19 |
Correct |
70 ms |
122316 KB |
Output is correct |
20 |
Correct |
67 ms |
122172 KB |
Output is correct |
21 |
Correct |
59 ms |
118124 KB |
Output is correct |
22 |
Correct |
66 ms |
121576 KB |
Output is correct |
23 |
Correct |
64 ms |
121080 KB |
Output is correct |
24 |
Correct |
73 ms |
122216 KB |
Output is correct |
25 |
Correct |
68 ms |
122284 KB |
Output is correct |
26 |
Correct |
69 ms |
122260 KB |
Output is correct |
27 |
Correct |
67 ms |
122208 KB |
Output is correct |
28 |
Correct |
69 ms |
122644 KB |
Output is correct |
29 |
Correct |
69 ms |
122160 KB |
Output is correct |
30 |
Correct |
72 ms |
122136 KB |
Output is correct |
31 |
Correct |
72 ms |
122288 KB |
Output is correct |
32 |
Correct |
75 ms |
122796 KB |
Output is correct |
33 |
Correct |
81 ms |
124208 KB |
Output is correct |
34 |
Correct |
76 ms |
124144 KB |
Output is correct |
35 |
Correct |
82 ms |
124192 KB |
Output is correct |
36 |
Correct |
68 ms |
120268 KB |
Output is correct |
37 |
Correct |
106 ms |
128284 KB |
Output is correct |
38 |
Correct |
103 ms |
127940 KB |
Output is correct |
39 |
Correct |
101 ms |
128008 KB |
Output is correct |
40 |
Correct |
101 ms |
128028 KB |
Output is correct |
41 |
Correct |
101 ms |
128076 KB |
Output is correct |
42 |
Correct |
82 ms |
122588 KB |
Output is correct |
43 |
Correct |
73 ms |
122504 KB |
Output is correct |
44 |
Correct |
77 ms |
122428 KB |
Output is correct |
45 |
Correct |
192 ms |
142280 KB |
Output is correct |
46 |
Correct |
199 ms |
142320 KB |
Output is correct |
47 |
Correct |
345 ms |
207020 KB |
Output is correct |
48 |
Runtime error |
333 ms |
262144 KB |
Execution killed with signal 9 |
49 |
Halted |
0 ms |
0 KB |
- |