oj.uz

Submission #550839

# Submission time Handle Problem Language Result Execution time Memory
550839 2022-04-19T10:14:07 Z Soumya1 Watching (JOI13_watching) C++17
100 / 100
 422 ms 23852 KB 
#include <bits/stdc++.h>
#ifdef __LOCAL__
#include <debug_local.h>
#endif
using namespace std;
const int mxN = 3000;
int dp[mxN][mxN];
int a[mxN];
int to[mxN], to1[mxN];
void testCase() {
  int n, p, q;
  cin >> n >> p >> q;
  p = min(p, n + 50);
  q = min(q, n + 50);
  for (int i = 1; i <= n; i++) cin >> a[i];
  sort(a, a + n + 1);
  auto check = [&](int w) {
    for (int i = 0; i <= n; i++) {
      for (int j = 0; j <= p; j++) {
        dp[i][j] = q + 1;
        if (i == 0) dp[i][j] = 0;
      }
    }
    for (int i = 1; i <= n; i++) {
      to[i] = lower_bound(a, a + n + 1, a[i] - w + 1) - a - 1;
      to1[i] = lower_bound(a, a + n + 1, a[i] - 2 * w + 1) - a - 1;
      to[i] = max(0, to[i]);
      to1[i] = max(0, to1[i]);
    }
    for (int i = 1; i <= n; i++) {
      for (int j = 0; j <= p; j++) {
        if (j) dp[i][j] = dp[to[i]][j - 1];
        if (dp[to1[i]][j] < q) dp[i][j] = min(dp[i][j], dp[to1[i]][j] + 1);
      }
    }
    return (*min_element(dp[n], dp[n] + p + 1) <= q);
  };
  int lo = 1, hi = 1e9;
  while (lo < hi) {
    int mid = (lo + hi) >> 1;
    if (check(mid)) hi = mid;
    else lo = mid + 1;
  }
  cout << lo << "\n";
}
int main() {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  testCase();
  return 0;
}

Subtask #1
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 724 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 3 ms 724 KB Output is correct
5 Correct 1 ms 724 KB Output is correct
6 Correct 4 ms 724 KB Output is correct
7 Correct 1 ms 724 KB Output is correct
8 Correct 1 ms 724 KB Output is correct
9 Correct 1 ms 724 KB Output is correct
10 Correct 1 ms 724 KB Output is correct
11 Correct 1 ms 724 KB Output is correct
12 Correct 1 ms 724 KB Output is correct
13 Correct 1 ms 724 KB Output is correct
14 Correct 1 ms 724 KB Output is correct
15 Correct 1 ms 724 KB Output is correct

Subtask #2
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 8416 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 271 ms 20172 KB Output is correct
4 Correct 422 ms 23764 KB Output is correct
5 Correct 27 ms 8956 KB Output is correct
6 Correct 379 ms 23852 KB Output is correct
7 Correct 14 ms 8404 KB Output is correct
8 Correct 35 ms 9328 KB Output is correct
9 Correct 149 ms 14268 KB Output is correct
10 Correct 325 ms 23228 KB Output is correct
11 Correct 25 ms 9044 KB Output is correct
12 Correct 190 ms 16012 KB Output is correct
13 Correct 13 ms 8472 KB Output is correct
14 Correct 15 ms 8532 KB Output is correct
15 Correct 17 ms 8532 KB Output is correct