#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 = 3e6 + 20;
const int inf = 1e9 + 20;
int B[maxN];
int P[maxN];
vector<pair<int, bool>> adj[maxC];
int dist[maxC];
void just_do_it() {
int N, M;
cin >> N >> M;
const int lim = 0;
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++;
}
}
}
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 |
33 ms |
70736 KB |
Output is correct |
2 |
Correct |
35 ms |
70732 KB |
Output is correct |
3 |
Correct |
34 ms |
70732 KB |
Output is correct |
4 |
Correct |
35 ms |
70768 KB |
Output is correct |
5 |
Correct |
36 ms |
70732 KB |
Output is correct |
6 |
Correct |
35 ms |
70740 KB |
Output is correct |
7 |
Correct |
35 ms |
70780 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
36 ms |
70740 KB |
Output is correct |
2 |
Correct |
36 ms |
70768 KB |
Output is correct |
3 |
Correct |
36 ms |
70716 KB |
Output is correct |
4 |
Correct |
37 ms |
70760 KB |
Output is correct |
5 |
Correct |
36 ms |
70696 KB |
Output is correct |
6 |
Correct |
36 ms |
70648 KB |
Output is correct |
7 |
Correct |
40 ms |
70680 KB |
Output is correct |
8 |
Correct |
35 ms |
70740 KB |
Output is correct |
9 |
Correct |
38 ms |
70696 KB |
Output is correct |
10 |
Correct |
37 ms |
70868 KB |
Output is correct |
11 |
Correct |
36 ms |
71260 KB |
Output is correct |
12 |
Correct |
68 ms |
80704 KB |
Output is correct |
13 |
Correct |
70 ms |
80904 KB |
Output is correct |
14 |
Correct |
35 ms |
71056 KB |
Output is correct |
15 |
Correct |
37 ms |
70976 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
35 ms |
70780 KB |
Output is correct |
2 |
Correct |
37 ms |
70704 KB |
Output is correct |
3 |
Correct |
35 ms |
70644 KB |
Output is correct |
4 |
Correct |
37 ms |
70740 KB |
Output is correct |
5 |
Correct |
35 ms |
70732 KB |
Output is correct |
6 |
Correct |
38 ms |
70672 KB |
Output is correct |
7 |
Correct |
35 ms |
70672 KB |
Output is correct |
8 |
Correct |
35 ms |
70800 KB |
Output is correct |
9 |
Correct |
36 ms |
70740 KB |
Output is correct |
10 |
Correct |
35 ms |
70836 KB |
Output is correct |
11 |
Correct |
37 ms |
71220 KB |
Output is correct |
12 |
Correct |
69 ms |
80704 KB |
Output is correct |
13 |
Correct |
70 ms |
80844 KB |
Output is correct |
14 |
Correct |
35 ms |
70988 KB |
Output is correct |
15 |
Correct |
35 ms |
70988 KB |
Output is correct |
16 |
Correct |
37 ms |
70996 KB |
Output is correct |
17 |
Correct |
38 ms |
71868 KB |
Output is correct |
18 |
Correct |
41 ms |
71068 KB |
Output is correct |
19 |
Correct |
37 ms |
70988 KB |
Output is correct |
20 |
Runtime error |
546 ms |
262144 KB |
Execution killed with signal 11 |
21 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
37 ms |
70836 KB |
Output is correct |
2 |
Correct |
37 ms |
70744 KB |
Output is correct |
3 |
Correct |
37 ms |
70740 KB |
Output is correct |
4 |
Correct |
38 ms |
70660 KB |
Output is correct |
5 |
Correct |
37 ms |
70768 KB |
Output is correct |
6 |
Correct |
37 ms |
70700 KB |
Output is correct |
7 |
Correct |
39 ms |
70684 KB |
Output is correct |
8 |
Correct |
37 ms |
70728 KB |
Output is correct |
9 |
Correct |
37 ms |
70764 KB |
Output is correct |
10 |
Correct |
38 ms |
70848 KB |
Output is correct |
11 |
Correct |
38 ms |
71240 KB |
Output is correct |
12 |
Correct |
71 ms |
80716 KB |
Output is correct |
13 |
Correct |
72 ms |
80948 KB |
Output is correct |
14 |
Correct |
43 ms |
70972 KB |
Output is correct |
15 |
Correct |
38 ms |
71056 KB |
Output is correct |
16 |
Correct |
38 ms |
71072 KB |
Output is correct |
17 |
Correct |
41 ms |
71940 KB |
Output is correct |
18 |
Correct |
38 ms |
71124 KB |
Output is correct |
19 |
Correct |
39 ms |
70984 KB |
Output is correct |
20 |
Runtime error |
515 ms |
262144 KB |
Execution killed with signal 11 |
21 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
36 ms |
70740 KB |
Output is correct |
2 |
Correct |
37 ms |
70724 KB |
Output is correct |
3 |
Correct |
38 ms |
70792 KB |
Output is correct |
4 |
Correct |
41 ms |
70720 KB |
Output is correct |
5 |
Correct |
43 ms |
70652 KB |
Output is correct |
6 |
Correct |
36 ms |
70704 KB |
Output is correct |
7 |
Correct |
42 ms |
70660 KB |
Output is correct |
8 |
Correct |
38 ms |
70708 KB |
Output is correct |
9 |
Correct |
37 ms |
70732 KB |
Output is correct |
10 |
Correct |
37 ms |
70800 KB |
Output is correct |
11 |
Correct |
39 ms |
71244 KB |
Output is correct |
12 |
Correct |
70 ms |
80800 KB |
Output is correct |
13 |
Correct |
72 ms |
80940 KB |
Output is correct |
14 |
Correct |
37 ms |
71060 KB |
Output is correct |
15 |
Correct |
38 ms |
71056 KB |
Output is correct |
16 |
Correct |
38 ms |
71052 KB |
Output is correct |
17 |
Correct |
41 ms |
71884 KB |
Output is correct |
18 |
Correct |
39 ms |
71068 KB |
Output is correct |
19 |
Correct |
41 ms |
70996 KB |
Output is correct |
20 |
Runtime error |
521 ms |
262144 KB |
Execution killed with signal 11 |
21 |
Halted |
0 ms |
0 KB |
- |