제출 #879251

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
879251		theghostking	A Huge Tower (CEOI10_tower)	C++17	100 / 100	234 ms	16192 KiB

tower

#include <bits/stdc++.h>
using namespace std;

#define int long long

signed main() {
    int n,d;
    cin >> n >> d;
    int arr[n];
    for (int i = 0; i<n; i++){
        cin >> arr[i];
    }
    sort(arr,arr+n);
    int nxt[n];
    for (int i = 0; i<n; i++){
        auto it = upper_bound(arr,arr+n,arr[i]+d);
        nxt[i] = (it-arr)-i;
    }
    const int MOD = 1e9+9;
    int ans = 1;
    for (int i = 0; i<n; i++){
        //cout << nxt[i] << " ";
        ans *= nxt[i];
        ans %= MOD;
    }
    //cout << "\n\n";
    cout << ans;
    return 0;
}

• Subtask 1: 5 / 5
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• Subtask 20: 5 / 5