제출 #768788

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
768788		orcslop	A Huge Tower (CEOI10_tower)	C++17	100 / 100	99 ms	14980 KiB

tower

#include <bits/stdc++.h>
using namespace std;
#define sz(x) (int)(x).size() 

const int MOD = 1e9 + 9; 

int n, d; 
vector<int> blocks, v;  

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL); cout.tie(NULL);
    cin >> n >> d; 
    for(int i = 0; i < n; i++){
        int a; cin >> a; 
        blocks.push_back(a); 
    }
    sort(blocks.begin(), blocks.end()); 
    int index = 0; 
    for(int i = 0; i < n; i++){
        while(index < n && blocks[index] + d < blocks[i]) index++; 
        v.push_back(i - index); 
    }
    long long ans = 1; 
    for(auto x : v) ans = ans * (x + 1) % MOD; 
    cout << ans; 
    return 0; 
}

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