#include <iostream>
#include <vector>
#include <algorithm>
#include <deque>
#include <cassert>
using namespace std;
const short INF = 32767;
int main()
{
cin.tie(0)->sync_with_stdio(0);
int n, m;
cin >> n >> m;
vector<pair<int, int>> doges(m);
for (auto &[b, p] : doges) cin >> b >> p;
const short D = 180;
vector<vector<short>> dp(n, vector<short>(D, INF));
vector<vector<short>> canGet(n), starts(n);
for (auto &[b, p] : doges)
{
starts[b].push_back(p);
if (p >= D) for (int i = b % p; i < n; i += p) canGet[i].push_back(p);
}
for (int i = 0; i < n; ++i)
{
sort(canGet[i].begin(), canGet[i].end());
canGet[i].erase(unique(canGet[i].begin(), canGet[i].end()), canGet[i].end());
sort(starts[i].begin(), starts[i].end());
starts[i].erase(unique(starts[i].begin(), starts[i].end()), starts[i].end());
dp[i].resize(D + canGet[i].size());
for (int j = 0; j < canGet[i].size(); ++j) dp[i][D + j] = INF;
}
auto getInd = [&canGet, &D](short v, short p) -> short
{
if (p < D) return p;
return (short)distance(canGet[v].begin(), lower_bound(canGet[v].begin(), canGet[v].end(), p)) + (short)D;
};
short ind = getInd(doges[0].first, doges[0].second);
dp[doges[0].first][ind] = 0;
deque<pair<short, short>> dq;
dq.emplace_back(doges[0].first, doges[0].second);
while (!dq.empty())
{
auto [i, p] = dq.front();
dq.pop_front();
short ind = getInd(i, p);
for (int j : starts[i])
{
int ind2 = getInd(i, j);
if (dp[i][ind2] > dp[i][ind])
{
dp[i][ind2] = dp[i][ind];
dq.emplace_front(i, j);
}
}
starts[i].clear();
if (i - p >= 0)
{
short ind2 = getInd(i - p, p);
if (dp[i - p][ind2] > dp[i][ind] + 1)
{
dp[i - p][ind2] = dp[i][ind] + 1;
dq.emplace_back(i - p, p);
}
}
if (i + p < n)
{
short ind2 = getInd(i + p, p);
if (dp[i + p][ind2] > dp[i][ind] + 1)
{
dp[i + p][ind2] = dp[i][ind] + 1;
dq.emplace_back(i + p, p);
}
}
}
ind = getInd(doges[1].first, doges[1].second);
if (dp[doges[1].first][ind] == INF) cout << -1;
else cout << dp[doges[1].first][ind];
return 0;
}
//47
Compilation message
skyscraper.cpp: In function 'int main()':
skyscraper.cpp:33:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<short int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
33 | for (int j = 0; j < canGet[i].size(); ++j) dp[i][D + j] = INF;
| ~~^~~~~~~~~~~~~~~~~~
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
212 KB |
Output is correct |
2 |
Correct |
0 ms |
212 KB |
Output is correct |
3 |
Correct |
0 ms |
212 KB |
Output is correct |
4 |
Correct |
0 ms |
212 KB |
Output is correct |
5 |
Correct |
1 ms |
212 KB |
Output is correct |
6 |
Correct |
0 ms |
212 KB |
Output is correct |
7 |
Correct |
0 ms |
212 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
212 KB |
Output is correct |
2 |
Correct |
1 ms |
212 KB |
Output is correct |
3 |
Correct |
0 ms |
212 KB |
Output is correct |
4 |
Correct |
0 ms |
212 KB |
Output is correct |
5 |
Correct |
0 ms |
212 KB |
Output is correct |
6 |
Correct |
0 ms |
212 KB |
Output is correct |
7 |
Correct |
0 ms |
212 KB |
Output is correct |
8 |
Correct |
1 ms |
212 KB |
Output is correct |
9 |
Correct |
0 ms |
340 KB |
Output is correct |
10 |
Correct |
1 ms |
340 KB |
Output is correct |
11 |
Correct |
1 ms |
340 KB |
Output is correct |
12 |
Correct |
1 ms |
340 KB |
Output is correct |
13 |
Correct |
1 ms |
340 KB |
Output is correct |
14 |
Correct |
1 ms |
340 KB |
Output is correct |
15 |
Correct |
1 ms |
340 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
212 KB |
Output is correct |
2 |
Correct |
1 ms |
212 KB |
Output is correct |
3 |
Correct |
1 ms |
212 KB |
Output is correct |
4 |
Correct |
0 ms |
212 KB |
Output is correct |
5 |
Correct |
1 ms |
212 KB |
Output is correct |
6 |
Correct |
1 ms |
212 KB |
Output is correct |
7 |
Correct |
1 ms |
212 KB |
Output is correct |
8 |
Correct |
0 ms |
212 KB |
Output is correct |
9 |
Correct |
1 ms |
340 KB |
Output is correct |
10 |
Correct |
1 ms |
340 KB |
Output is correct |
11 |
Correct |
1 ms |
340 KB |
Output is correct |
12 |
Correct |
1 ms |
340 KB |
Output is correct |
13 |
Correct |
1 ms |
340 KB |
Output is correct |
14 |
Correct |
1 ms |
340 KB |
Output is correct |
15 |
Correct |
1 ms |
340 KB |
Output is correct |
16 |
Correct |
1 ms |
468 KB |
Output is correct |
17 |
Correct |
3 ms |
852 KB |
Output is correct |
18 |
Correct |
2 ms |
1620 KB |
Output is correct |
19 |
Correct |
2 ms |
1620 KB |
Output is correct |
20 |
Correct |
1 ms |
1236 KB |
Output is correct |
21 |
Correct |
1 ms |
596 KB |
Output is correct |
22 |
Correct |
2 ms |
1492 KB |
Output is correct |
23 |
Correct |
2 ms |
1492 KB |
Output is correct |
24 |
Correct |
4 ms |
1900 KB |
Output is correct |
25 |
Correct |
4 ms |
1876 KB |
Output is correct |
26 |
Correct |
1 ms |
1236 KB |
Output is correct |
27 |
Correct |
2 ms |
1364 KB |
Output is correct |
28 |
Correct |
5 ms |
1876 KB |
Output is correct |
29 |
Correct |
3 ms |
1108 KB |
Output is correct |
30 |
Correct |
1 ms |
1108 KB |
Output is correct |
31 |
Correct |
2 ms |
1108 KB |
Output is correct |
32 |
Correct |
2 ms |
1108 KB |
Output is correct |
33 |
Correct |
5 ms |
1104 KB |
Output is correct |
34 |
Correct |
4 ms |
1108 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
212 KB |
Output is correct |
2 |
Correct |
1 ms |
212 KB |
Output is correct |
3 |
Correct |
1 ms |
212 KB |
Output is correct |
4 |
Correct |
1 ms |
212 KB |
Output is correct |
5 |
Correct |
1 ms |
212 KB |
Output is correct |
6 |
Correct |
1 ms |
212 KB |
Output is correct |
7 |
Correct |
1 ms |
212 KB |
Output is correct |
8 |
Correct |
0 ms |
212 KB |
Output is correct |
9 |
Correct |
1 ms |
340 KB |
Output is correct |
10 |
Correct |
1 ms |
340 KB |
Output is correct |
11 |
Correct |
1 ms |
340 KB |
Output is correct |
12 |
Correct |
1 ms |
340 KB |
Output is correct |
13 |
Correct |
1 ms |
340 KB |
Output is correct |
14 |
Correct |
1 ms |
340 KB |
Output is correct |
15 |
Correct |
1 ms |
340 KB |
Output is correct |
16 |
Correct |
1 ms |
468 KB |
Output is correct |
17 |
Correct |
2 ms |
852 KB |
Output is correct |
18 |
Correct |
2 ms |
1620 KB |
Output is correct |
19 |
Correct |
2 ms |
1620 KB |
Output is correct |
20 |
Correct |
1 ms |
1236 KB |
Output is correct |
21 |
Correct |
1 ms |
596 KB |
Output is correct |
22 |
Correct |
1 ms |
1620 KB |
Output is correct |
23 |
Correct |
2 ms |
1492 KB |
Output is correct |
24 |
Correct |
3 ms |
1876 KB |
Output is correct |
25 |
Correct |
2 ms |
1876 KB |
Output is correct |
26 |
Correct |
2 ms |
1236 KB |
Output is correct |
27 |
Correct |
3 ms |
1364 KB |
Output is correct |
28 |
Correct |
5 ms |
1908 KB |
Output is correct |
29 |
Correct |
2 ms |
1108 KB |
Output is correct |
30 |
Correct |
1 ms |
1108 KB |
Output is correct |
31 |
Correct |
2 ms |
1108 KB |
Output is correct |
32 |
Correct |
2 ms |
1108 KB |
Output is correct |
33 |
Correct |
4 ms |
1108 KB |
Output is correct |
34 |
Correct |
5 ms |
1108 KB |
Output is correct |
35 |
Correct |
21 ms |
2004 KB |
Output is correct |
36 |
Correct |
5 ms |
1236 KB |
Output is correct |
37 |
Correct |
28 ms |
2516 KB |
Output is correct |
38 |
Correct |
23 ms |
2644 KB |
Output is correct |
39 |
Correct |
28 ms |
2644 KB |
Output is correct |
40 |
Correct |
24 ms |
2620 KB |
Output is correct |
41 |
Correct |
25 ms |
2644 KB |
Output is correct |
42 |
Correct |
5 ms |
1492 KB |
Output is correct |
43 |
Correct |
6 ms |
1748 KB |
Output is correct |
44 |
Correct |
5 ms |
1492 KB |
Output is correct |
45 |
Correct |
41 ms |
2892 KB |
Output is correct |
46 |
Correct |
29 ms |
2900 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
212 KB |
Output is correct |
2 |
Correct |
1 ms |
212 KB |
Output is correct |
3 |
Correct |
1 ms |
212 KB |
Output is correct |
4 |
Correct |
1 ms |
212 KB |
Output is correct |
5 |
Correct |
0 ms |
212 KB |
Output is correct |
6 |
Correct |
1 ms |
212 KB |
Output is correct |
7 |
Correct |
0 ms |
212 KB |
Output is correct |
8 |
Correct |
0 ms |
212 KB |
Output is correct |
9 |
Correct |
1 ms |
340 KB |
Output is correct |
10 |
Correct |
1 ms |
340 KB |
Output is correct |
11 |
Correct |
1 ms |
340 KB |
Output is correct |
12 |
Correct |
1 ms |
340 KB |
Output is correct |
13 |
Correct |
1 ms |
340 KB |
Output is correct |
14 |
Correct |
2 ms |
340 KB |
Output is correct |
15 |
Correct |
1 ms |
340 KB |
Output is correct |
16 |
Correct |
1 ms |
340 KB |
Output is correct |
17 |
Correct |
2 ms |
852 KB |
Output is correct |
18 |
Correct |
2 ms |
1620 KB |
Output is correct |
19 |
Correct |
3 ms |
1620 KB |
Output is correct |
20 |
Correct |
1 ms |
1236 KB |
Output is correct |
21 |
Correct |
1 ms |
596 KB |
Output is correct |
22 |
Correct |
2 ms |
1544 KB |
Output is correct |
23 |
Correct |
2 ms |
1492 KB |
Output is correct |
24 |
Correct |
3 ms |
1876 KB |
Output is correct |
25 |
Correct |
3 ms |
1876 KB |
Output is correct |
26 |
Correct |
2 ms |
1236 KB |
Output is correct |
27 |
Correct |
2 ms |
1364 KB |
Output is correct |
28 |
Correct |
3 ms |
1876 KB |
Output is correct |
29 |
Correct |
3 ms |
1108 KB |
Output is correct |
30 |
Correct |
1 ms |
1108 KB |
Output is correct |
31 |
Correct |
2 ms |
1108 KB |
Output is correct |
32 |
Correct |
2 ms |
1108 KB |
Output is correct |
33 |
Correct |
4 ms |
1108 KB |
Output is correct |
34 |
Correct |
3 ms |
1108 KB |
Output is correct |
35 |
Correct |
15 ms |
2004 KB |
Output is correct |
36 |
Correct |
4 ms |
1236 KB |
Output is correct |
37 |
Correct |
23 ms |
2504 KB |
Output is correct |
38 |
Correct |
25 ms |
2612 KB |
Output is correct |
39 |
Correct |
29 ms |
2644 KB |
Output is correct |
40 |
Correct |
23 ms |
2580 KB |
Output is correct |
41 |
Correct |
25 ms |
2648 KB |
Output is correct |
42 |
Correct |
9 ms |
1556 KB |
Output is correct |
43 |
Correct |
9 ms |
1720 KB |
Output is correct |
44 |
Correct |
6 ms |
1492 KB |
Output is correct |
45 |
Correct |
28 ms |
2900 KB |
Output is correct |
46 |
Correct |
29 ms |
2960 KB |
Output is correct |
47 |
Correct |
140 ms |
12048 KB |
Output is correct |
48 |
Correct |
38 ms |
20172 KB |
Output is correct |
49 |
Correct |
39 ms |
21780 KB |
Output is correct |
50 |
Correct |
38 ms |
23376 KB |
Output is correct |
51 |
Correct |
105 ms |
26168 KB |
Output is correct |
52 |
Correct |
106 ms |
26060 KB |
Output is correct |
53 |
Correct |
37 ms |
23704 KB |
Output is correct |
54 |
Correct |
10 ms |
13240 KB |
Output is correct |
55 |
Correct |
9 ms |
13252 KB |
Output is correct |
56 |
Correct |
20 ms |
14548 KB |
Output is correct |
57 |
Correct |
35 ms |
13260 KB |
Output is correct |
58 |
Incorrect |
14 ms |
13644 KB |
Output isn't correct |
59 |
Halted |
0 ms |
0 KB |
- |