제출 #1118772

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1118772		Minbaev	A Huge Tower (CEOI10_tower)	C++17	100 / 100	102 ms	11172 KiB

tower

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
 
#pragma GCC target("avx,avx2,fma")
#pragma GCC optimize("Ofast,unroll-loops")
 
using namespace std;
using namespace __gnu_pbds;
 
#define pb 		push_back
#define all(x) 	x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define f 		first
#define s 		second
#define int 	long long
#define ll 		long long
#define pii 	pair<int,int>
#define ar 		array
#define mps		make_pair
 
template<class T>bool umax(T &a,T b){if(a<b){a=b;return true;}return false;}
template<class T>bool umin(T &a,T b){if(b<a){a=b;return true;}return false;}
 
template<class T> using ste = tree<T, null_type, less_equal<T>,
rb_tree_tag, tree_order_statistics_node_update>;
 
const int inf = 3e18 + 7;
const int mod = 1e9 + 9;
const int N = 2e5 + 5;
const int md = 998244353;
 
int binpow(int a, int b, int m){
	if(b == 0)return 1;
	if(b % 2 == 0){
		int c = binpow(a,b/2,m);
		return (c*c)%m;
	}
	return (binpow(a,b-1,m)*a)%m;
}
 
int divi(int a, int b, int m){
	return (a*(binpow(b,m-2, m)))%m;
}
 
int n,m,k,q;

void solve(){
 
	cin >> n >> k;
	vector<int>v(n);
	for(auto &to:v)cin >> to;
	
	sort(all(v));
	
	int l = 0, r = 0, ans = 1;
	while(l < n){
		while(r < n && v[r]-v[l] <= k)r += 1;
		ans *= (r-l);
		ans %= mod;
		l += 1;
	}
	
	cout << ans << "\n";
 	
 	
 	
 	
 	
 	
 	
}
/*
 
*/
 signed main()
{
//	freopen("seq.in", "r", stdin);
//  freopen("seq.out", "w", stdout);
	ios_base::sync_with_stdio(0);cin.tie(NULL);cout.tie(NULL);
	int tt=1;//cin>>tt;
	while(tt--)solve();
 
}

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