#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];
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 |
59 ms |
117708 KB |
Output is correct |
2 |
Correct |
66 ms |
117616 KB |
Output is correct |
3 |
Correct |
63 ms |
117708 KB |
Output is correct |
4 |
Correct |
60 ms |
117656 KB |
Output is correct |
5 |
Correct |
63 ms |
117684 KB |
Output is correct |
6 |
Correct |
59 ms |
117664 KB |
Output is correct |
7 |
Correct |
60 ms |
117656 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
57 ms |
117612 KB |
Output is correct |
2 |
Correct |
61 ms |
117708 KB |
Output is correct |
3 |
Correct |
60 ms |
117728 KB |
Output is correct |
4 |
Correct |
54 ms |
117708 KB |
Output is correct |
5 |
Correct |
57 ms |
117612 KB |
Output is correct |
6 |
Correct |
59 ms |
117732 KB |
Output is correct |
7 |
Correct |
62 ms |
117612 KB |
Output is correct |
8 |
Correct |
59 ms |
117624 KB |
Output is correct |
9 |
Correct |
58 ms |
117648 KB |
Output is correct |
10 |
Correct |
57 ms |
117836 KB |
Output is correct |
11 |
Correct |
60 ms |
118224 KB |
Output is correct |
12 |
Correct |
90 ms |
127784 KB |
Output is correct |
13 |
Correct |
90 ms |
127908 KB |
Output is correct |
14 |
Correct |
61 ms |
117984 KB |
Output is correct |
15 |
Correct |
58 ms |
117968 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
63 ms |
117716 KB |
Output is correct |
2 |
Correct |
63 ms |
117732 KB |
Output is correct |
3 |
Correct |
57 ms |
117728 KB |
Output is correct |
4 |
Correct |
64 ms |
117708 KB |
Output is correct |
5 |
Correct |
57 ms |
117676 KB |
Output is correct |
6 |
Correct |
56 ms |
117692 KB |
Output is correct |
7 |
Correct |
56 ms |
117672 KB |
Output is correct |
8 |
Correct |
56 ms |
117668 KB |
Output is correct |
9 |
Correct |
55 ms |
117708 KB |
Output is correct |
10 |
Correct |
62 ms |
117844 KB |
Output is correct |
11 |
Correct |
58 ms |
118232 KB |
Output is correct |
12 |
Correct |
87 ms |
127680 KB |
Output is correct |
13 |
Correct |
90 ms |
127880 KB |
Output is correct |
14 |
Correct |
57 ms |
117936 KB |
Output is correct |
15 |
Correct |
58 ms |
117964 KB |
Output is correct |
16 |
Correct |
57 ms |
117908 KB |
Output is correct |
17 |
Correct |
60 ms |
118860 KB |
Output is correct |
18 |
Correct |
56 ms |
118052 KB |
Output is correct |
19 |
Correct |
59 ms |
117988 KB |
Output is correct |
20 |
Runtime error |
312 ms |
262144 KB |
Execution killed with signal 9 |
21 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
58 ms |
117708 KB |
Output is correct |
2 |
Correct |
58 ms |
117716 KB |
Output is correct |
3 |
Correct |
64 ms |
117648 KB |
Output is correct |
4 |
Correct |
56 ms |
117636 KB |
Output is correct |
5 |
Correct |
56 ms |
117648 KB |
Output is correct |
6 |
Correct |
55 ms |
117628 KB |
Output is correct |
7 |
Correct |
57 ms |
117680 KB |
Output is correct |
8 |
Correct |
58 ms |
117708 KB |
Output is correct |
9 |
Correct |
62 ms |
117712 KB |
Output is correct |
10 |
Correct |
59 ms |
117752 KB |
Output is correct |
11 |
Correct |
62 ms |
118124 KB |
Output is correct |
12 |
Correct |
89 ms |
127688 KB |
Output is correct |
13 |
Correct |
93 ms |
127900 KB |
Output is correct |
14 |
Correct |
58 ms |
117940 KB |
Output is correct |
15 |
Correct |
62 ms |
118004 KB |
Output is correct |
16 |
Correct |
57 ms |
118032 KB |
Output is correct |
17 |
Correct |
67 ms |
118832 KB |
Output is correct |
18 |
Correct |
55 ms |
118088 KB |
Output is correct |
19 |
Correct |
56 ms |
117964 KB |
Output is correct |
20 |
Runtime error |
317 ms |
262144 KB |
Execution killed with signal 9 |
21 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
56 ms |
117708 KB |
Output is correct |
2 |
Correct |
57 ms |
117620 KB |
Output is correct |
3 |
Correct |
61 ms |
117680 KB |
Output is correct |
4 |
Correct |
57 ms |
117668 KB |
Output is correct |
5 |
Correct |
57 ms |
117692 KB |
Output is correct |
6 |
Correct |
61 ms |
117652 KB |
Output is correct |
7 |
Correct |
57 ms |
117732 KB |
Output is correct |
8 |
Correct |
59 ms |
117680 KB |
Output is correct |
9 |
Correct |
56 ms |
117712 KB |
Output is correct |
10 |
Correct |
57 ms |
117724 KB |
Output is correct |
11 |
Correct |
59 ms |
118332 KB |
Output is correct |
12 |
Correct |
91 ms |
127772 KB |
Output is correct |
13 |
Correct |
91 ms |
127844 KB |
Output is correct |
14 |
Correct |
57 ms |
118040 KB |
Output is correct |
15 |
Correct |
58 ms |
117984 KB |
Output is correct |
16 |
Correct |
57 ms |
117992 KB |
Output is correct |
17 |
Correct |
60 ms |
118796 KB |
Output is correct |
18 |
Correct |
59 ms |
118112 KB |
Output is correct |
19 |
Correct |
57 ms |
117988 KB |
Output is correct |
20 |
Runtime error |
330 ms |
262144 KB |
Execution killed with signal 9 |
21 |
Halted |
0 ms |
0 KB |
- |