Submission #847675

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
847675	2023-09-10 06:37:16	handlename	A Huge Tower (CEOI10_tower)	C++17	90 / 100	17 ms	4212 KiB

tower

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#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define mp make_pair
#define float long double
const int MOD=1e9+9;
//const int MOD=998244353;
const int sqn=450;
const long double eps=1e-6;
int n,d,arr[200001];
void runtc(){
  cin>>n>>d;
  for (int i=1;i<=n;i++){
    cin>>arr[i];
  }
  sort(arr+1,arr+n+1);
  reverse(arr+1,arr+n+1);
  long long ans=1;
  int id=1;
  for (int i=1;i<=n;i++){
    while (arr[id]>arr[i]+d) id++;
    ans*=i-id+1;
    ans%=MOD;
  }
  cout<<ans;
}
int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
 
 
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