Submission #726414

#	Time	Username	Problem	Language	Result	Execution time	Memory
726414		professionalACer	A Huge Tower (CEOI10_tower)	C++17	100 / 100	273 ms	11140 KiB

tower

#include <bits/stdc++.h>
#define int long long
using namespace std;
const int mod = 1e9 + 9;
signed main() {
  int N, D;
  cin >> N >> D;
  int A[N];
  for (auto &x : A) cin >> x;
  sort(A, A + N);
  int p = 0, ans = 1;
  for (int i = 0; i < N; i++) {
    while (p < N - 1 && A[p + 1] - A[i] <= D) p++;
    int d = p - i + 1;
    ans = (ans * d) % mod;
  }
  cout << ans << endl;
}

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 5 / 5
• Subtask 4: 5 / 5
• Subtask 5: 5 / 5
• Subtask 6: 5 / 5
• Subtask 7: 5 / 5
• Subtask 8: 5 / 5
• Subtask 9: 5 / 5
• Subtask 10: 5 / 5
• Subtask 11: 5 / 5
• Subtask 12: 5 / 5
• Subtask 13: 5 / 5
• Subtask 14: 5 / 5
• Subtask 15: 5 / 5
• Subtask 16: 5 / 5
• Subtask 17: 5 / 5
• Subtask 18: 5 / 5
• Subtask 19: 5 / 5
• Subtask 20: 5 / 5