Submission #483335

#	Time	Username	Problem	Language	Result	Execution time	Memory
483335		BERNARB01	Global Warming (CEOI18_glo)	C++17	0 / 100	2 ms	460 KiB

glo

#include <bits/stdc++.h>

using namespace std;

const int N = (int) 2e3 + 9;
const int inf = (int) 1e9 + 9;

long long n, x, a[N], lis_dp[N];

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  cin >> n >> x;
  for (int i = 0; i < n; i++) {
    cin >> a[i];
  }
  int ans = 1;
  for (int ii = n - 1; ii >= 0; ii--) {
    a[ii] += x;
    fill(lis_dp, lis_dp + n, inf);
    for (int i = 0; i < n; i++) {
      int j = lower_bound(lis_dp, lis_dp + n, a[i]) - lis_dp;
      lis_dp[j] = a[i];
      ans = max(ans, j + 1);
    }
  }
  for (int ii = 0; ii < n; ii++) {
    a[ii] -= 2 * x;
    fill(lis_dp, lis_dp + n, inf);
    for (int i = 0; i < n; i++) {
      int j = lower_bound(lis_dp, lis_dp + n, a[i]) - lis_dp;
      lis_dp[j] = a[i];
      ans = max(ans, j + 1);
    }
  }
  cout << ans << '\n';
  return 0;
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 10
• Subtask 3: 0 / 13
• Subtask 4: 0 / 10
• Subtask 5: 0 / 20
• Subtask 6: 0 / 17
• Subtask 7: 0 / 25