제출 #497496

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
497496		mehdi_farhadian	A Huge Tower (CEOI10_tower)	C++17	100 / 100	126 ms	8732 KiB

tower

#include <bits/stdc++.h>
#define pb push_back
#define endl '\n'
#pragma GCC optimize("unroll-loops")
#pragma GCC optimize("Ofast")
#pragma GCC optimize("O0")
#pragma GCC optimize("O1")
using namespace std;
typedef long long ll;

const int mod = 1e9 + 9;
int n, k;
vector<int> vec;

void solve()
{
    ll res = 1;
    for (int i = 0; i < n; i++) {
        int tmp = vec[i] - k - 1;
        int ind = upper_bound(vec.begin(), vec.end(), tmp) - vec.begin();
        res *= i - ind + 1;
        res %= mod;
    }
    cout << res << endl;
}

int main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);
    cin >> n >> k;
    vec.resize(n);
    for (int i = 0; i < n; i++) {
        cin >> vec[i];
    }
    sort(vec.begin(), vec.end());
    solve();
}

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• Subtask 20: 5 / 5