제출 #1010187

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1010187		Petrix	A Huge Tower (CEOI10_tower)	C++17	100 / 100	203 ms	12112 KiB

tower

#include <iostream>
#include <algorithm>
using namespace std;

#define MOD 1000000009

long long v[10000001];

int main()
{
    long long n,m,i,rasp,st;
    cin>>n>>m;
    for(i=1;i<=n;i++) cin>>v[i];
    sort(v+1,v+n+1);
    rasp=1;st=1;
    for(i=1;i<=n;i++){
        while(st<i && v[st]+m<v[i])
            st++;
        rasp=(rasp*(i-st+1))%MOD;
    }
    cout<<rasp;
    return 0;
}

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