제출 #1341045

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1341045		ashikur_	A Huge Tower (CEOI10_tower)	C++20	30 / 100	74 ms	5188 KiB

tower

#include <bits/stdc++.h>
using namespace std;
 
#define inf (ll)1e15
#define ll long long
#define lll __int128_t
#define pi pair<int, int>
#define pl pair<ll, ll>
#define vi vector<int>
#define vl vector<ll>
 
int main(){
    std::ios::sync_with_stdio(false);
    cin.tie(nullptr);
    // static mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
    // uniform_int_distribution<ll> range(0, LLONG_MAX);
    // freopen("art.in", "r", stdin);
    // freopen("art.out", "w", stdout);
 
    long long test = 1; 
    // cin >> test;
    while(test--){
        ll n, d; cin >> n >> d;
        vl vtr(n);
        for(ll i = 0; i < n; i++) cin >> vtr[i];
        sort(vtr.begin(), vtr.end());

        const ll mod = 1000000009;
        ll ans = 1, r = 0;
        for(ll l = 0; l < n; l++){
            while(r < n && vtr[r] - vtr[l] <= d) r++; 
            ans *= (r-l) % mod;
        }
        cout << ans << '\n';
    }
}

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