#include <iostream>
#include <vector>
#include <algorithm>
#include <queue>
#include <map>
#include <cmath>
using namespace std;
long long N, M, A[30009], P[30009]; int cnt = 0;
vector<int>X[30009];
map<pair<long long, long long>, int>MM, MM2, dist; queue<pair<int, int>>Q;
void refresh(int to, int dst, int val) {
if (to < 0 || to >= N) return;
int F = dist[make_pair(to, dst)];
if (F == 0) {
dist[make_pair(to, dst)] = val;
Q.push(make_pair(to, dst));
}
}
int main() {
cin >> N >> M;
for (int i = 1; i <= M; i++) {
cin >> A[i] >> P[i];
long long G = A[i] % P[i]; MM2[make_pair(A[i], P[i])] = 1;
if (MM[make_pair(G, P[i])] == 1) continue;
MM[make_pair(G, P[i])] = 1;
for (int j = G; j + P[i] < N; j++) {
X[j].push_back(j + P[i]);
X[j + P[i]].push_back(j);
}
}
Q.push(make_pair(A[1], 0)); dist[make_pair(A[1], 0)] = 1;
while (!Q.empty()) {
pair<int, int> pos1 = Q.front(); Q.pop();
int pos = pos1.first, state = pos1.second;
if (state == 0) {
for (int i = 0; i < X[pos].size(); i++) {
int to = X[pos][i], dst = abs(pos - to); cnt++; if (MM2[make_pair(pos, dst)] == 0) continue;
refresh(to, dst, dist[pos1] + 1);
refresh(to, 0, dist[pos1] + 1);
}
}
else {
refresh(pos - state, state, dist[pos1] + 1);
refresh(pos + state, state, dist[pos1] + 1);
refresh(pos - state, 0, dist[pos1] + 1);
refresh(pos + state, 0, dist[pos1] + 1);
}
}
cout << dist[make_pair(A[2], 0)] - 1 << endl;
return 0;
}
Compilation message
skyscraper.cpp: In function 'int main()':
skyscraper.cpp:41:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for (int i = 0; i < X[pos].size(); i++) {
~~^~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
1016 KB |
Output is correct |
| 2 |
Correct |
2 ms |
1124 KB |
Output is correct |
| 3 |
Correct |
3 ms |
1220 KB |
Output is correct |
| 4 |
Correct |
2 ms |
1220 KB |
Output is correct |
| 5 |
Correct |
2 ms |
1220 KB |
Output is correct |
| 6 |
Correct |
2 ms |
1220 KB |
Output is correct |
| 7 |
Correct |
2 ms |
1220 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
1220 KB |
Output is correct |
| 2 |
Correct |
2 ms |
1220 KB |
Output is correct |
| 3 |
Correct |
2 ms |
1220 KB |
Output is correct |
| 4 |
Correct |
2 ms |
1248 KB |
Output is correct |
| 5 |
Correct |
2 ms |
1436 KB |
Output is correct |
| 6 |
Correct |
2 ms |
1436 KB |
Output is correct |
| 7 |
Correct |
3 ms |
1436 KB |
Output is correct |
| 8 |
Correct |
3 ms |
1436 KB |
Output is correct |
| 9 |
Correct |
3 ms |
1436 KB |
Output is correct |
| 10 |
Correct |
8 ms |
1892 KB |
Output is correct |
| 11 |
Correct |
20 ms |
2532 KB |
Output is correct |
| 12 |
Correct |
5 ms |
2532 KB |
Output is correct |
| 13 |
Correct |
3 ms |
2532 KB |
Output is correct |
| 14 |
Correct |
29 ms |
2952 KB |
Output is correct |
| 15 |
Correct |
35 ms |
2952 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
3 ms |
2952 KB |
Output is correct |
| 2 |
Correct |
2 ms |
2952 KB |
Output is correct |
| 3 |
Correct |
2 ms |
2952 KB |
Output is correct |
| 4 |
Correct |
2 ms |
2952 KB |
Output is correct |
| 5 |
Correct |
2 ms |
2952 KB |
Output is correct |
| 6 |
Correct |
3 ms |
2952 KB |
Output is correct |
| 7 |
Correct |
2 ms |
2952 KB |
Output is correct |
| 8 |
Correct |
2 ms |
2952 KB |
Output is correct |
| 9 |
Correct |
3 ms |
2952 KB |
Output is correct |
| 10 |
Correct |
10 ms |
2952 KB |
Output is correct |
| 11 |
Correct |
21 ms |
2952 KB |
Output is correct |
| 12 |
Correct |
4 ms |
2952 KB |
Output is correct |
| 13 |
Correct |
3 ms |
2952 KB |
Output is correct |
| 14 |
Correct |
26 ms |
2952 KB |
Output is correct |
| 15 |
Correct |
26 ms |
2952 KB |
Output is correct |
| 16 |
Correct |
5 ms |
2952 KB |
Output is correct |
| 17 |
Correct |
247 ms |
28156 KB |
Output is correct |
| 18 |
Correct |
23 ms |
28156 KB |
Output is correct |
| 19 |
Correct |
18 ms |
28156 KB |
Output is correct |
| 20 |
Correct |
6 ms |
28156 KB |
Output is correct |
| 21 |
Correct |
6 ms |
28156 KB |
Output is correct |
| 22 |
Correct |
20 ms |
28156 KB |
Output is correct |
| 23 |
Correct |
234 ms |
38860 KB |
Output is correct |
| 24 |
Correct |
599 ms |
90376 KB |
Output is correct |
| 25 |
Correct |
455 ms |
90376 KB |
Output is correct |
| 26 |
Correct |
93 ms |
90376 KB |
Output is correct |
| 27 |
Correct |
135 ms |
90376 KB |
Output is correct |
| 28 |
Correct |
460 ms |
90376 KB |
Output is correct |
| 29 |
Correct |
379 ms |
90376 KB |
Output is correct |
| 30 |
Correct |
81 ms |
90376 KB |
Output is correct |
| 31 |
Correct |
244 ms |
90376 KB |
Output is correct |
| 32 |
Correct |
177 ms |
90376 KB |
Output is correct |
| 33 |
Execution timed out |
1056 ms |
90376 KB |
Time limit exceeded |
| 34 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
90376 KB |
Output is correct |
| 2 |
Correct |
2 ms |
90376 KB |
Output is correct |
| 3 |
Correct |
2 ms |
90376 KB |
Output is correct |
| 4 |
Correct |
2 ms |
90376 KB |
Output is correct |
| 5 |
Correct |
3 ms |
90376 KB |
Output is correct |
| 6 |
Correct |
2 ms |
90376 KB |
Output is correct |
| 7 |
Correct |
3 ms |
90376 KB |
Output is correct |
| 8 |
Correct |
2 ms |
90376 KB |
Output is correct |
| 9 |
Correct |
3 ms |
90376 KB |
Output is correct |
| 10 |
Correct |
8 ms |
90376 KB |
Output is correct |
| 11 |
Correct |
19 ms |
90376 KB |
Output is correct |
| 12 |
Correct |
4 ms |
90376 KB |
Output is correct |
| 13 |
Correct |
3 ms |
90376 KB |
Output is correct |
| 14 |
Correct |
26 ms |
90376 KB |
Output is correct |
| 15 |
Correct |
26 ms |
90376 KB |
Output is correct |
| 16 |
Correct |
5 ms |
90376 KB |
Output is correct |
| 17 |
Correct |
251 ms |
90376 KB |
Output is correct |
| 18 |
Correct |
26 ms |
90376 KB |
Output is correct |
| 19 |
Correct |
17 ms |
90376 KB |
Output is correct |
| 20 |
Correct |
6 ms |
90376 KB |
Output is correct |
| 21 |
Correct |
6 ms |
90376 KB |
Output is correct |
| 22 |
Correct |
21 ms |
90376 KB |
Output is correct |
| 23 |
Correct |
218 ms |
90376 KB |
Output is correct |
| 24 |
Correct |
600 ms |
90408 KB |
Output is correct |
| 25 |
Correct |
421 ms |
90408 KB |
Output is correct |
| 26 |
Correct |
83 ms |
90408 KB |
Output is correct |
| 27 |
Correct |
130 ms |
90408 KB |
Output is correct |
| 28 |
Correct |
446 ms |
90408 KB |
Output is correct |
| 29 |
Correct |
379 ms |
90408 KB |
Output is correct |
| 30 |
Correct |
77 ms |
90408 KB |
Output is correct |
| 31 |
Correct |
242 ms |
90408 KB |
Output is correct |
| 32 |
Correct |
165 ms |
90408 KB |
Output is correct |
| 33 |
Execution timed out |
1053 ms |
90408 KB |
Time limit exceeded |
| 34 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
90408 KB |
Output is correct |
| 2 |
Correct |
2 ms |
90408 KB |
Output is correct |
| 3 |
Correct |
2 ms |
90408 KB |
Output is correct |
| 4 |
Correct |
2 ms |
90408 KB |
Output is correct |
| 5 |
Correct |
2 ms |
90408 KB |
Output is correct |
| 6 |
Correct |
2 ms |
90408 KB |
Output is correct |
| 7 |
Correct |
2 ms |
90408 KB |
Output is correct |
| 8 |
Correct |
2 ms |
90408 KB |
Output is correct |
| 9 |
Correct |
3 ms |
90408 KB |
Output is correct |
| 10 |
Correct |
8 ms |
90408 KB |
Output is correct |
| 11 |
Correct |
19 ms |
90408 KB |
Output is correct |
| 12 |
Correct |
4 ms |
90408 KB |
Output is correct |
| 13 |
Correct |
3 ms |
90408 KB |
Output is correct |
| 14 |
Correct |
27 ms |
90408 KB |
Output is correct |
| 15 |
Correct |
26 ms |
90408 KB |
Output is correct |
| 16 |
Correct |
6 ms |
90408 KB |
Output is correct |
| 17 |
Correct |
261 ms |
90408 KB |
Output is correct |
| 18 |
Correct |
23 ms |
90408 KB |
Output is correct |
| 19 |
Correct |
18 ms |
90408 KB |
Output is correct |
| 20 |
Correct |
6 ms |
90408 KB |
Output is correct |
| 21 |
Correct |
5 ms |
90408 KB |
Output is correct |
| 22 |
Correct |
19 ms |
90408 KB |
Output is correct |
| 23 |
Correct |
222 ms |
90408 KB |
Output is correct |
| 24 |
Correct |
594 ms |
90408 KB |
Output is correct |
| 25 |
Correct |
428 ms |
90408 KB |
Output is correct |
| 26 |
Correct |
86 ms |
90408 KB |
Output is correct |
| 27 |
Correct |
129 ms |
90408 KB |
Output is correct |
| 28 |
Correct |
467 ms |
90408 KB |
Output is correct |
| 29 |
Correct |
396 ms |
90408 KB |
Output is correct |
| 30 |
Correct |
83 ms |
90408 KB |
Output is correct |
| 31 |
Correct |
239 ms |
90408 KB |
Output is correct |
| 32 |
Correct |
171 ms |
90408 KB |
Output is correct |
| 33 |
Execution timed out |
1085 ms |
90408 KB |
Time limit exceeded |
| 34 |
Halted |
0 ms |
0 KB |
- |
