제출 #1304695

#제출 시각아이디문제언어결과실행 시간메모리
1304695naperiggersA Huge Tower (CEOI10_tower)C++20
100 / 100
106 ms5184 KiB
#include <bits/stdc++.h> using namespace std; int main() { ios::sync_with_stdio(false); cin.tie(nullptr); long long mod = 1e9 + 9; int n; long long d; cin >> n >> d; vector<long long> a(n); for (auto &x : a) cin >> x; sort(a.begin(), a.end()); long long ans = 1; for (int i = 0; i < n; i++) { long long limit = a[i] + d; long long cnt = upper_bound(a.begin(), a.end(), limit) - (a.begin() + i); ans = (ans*cnt)%mod; } cout << ans << "\n"; return 0; }
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