Submission #383796

#	Time	Username	Problem	Language	Result	Execution time	Memory
383796		wabadabakalakaboo	A Huge Tower (CEOI10_tower)	C++17	100 / 100	298 ms	5228 KiB

tower

#include <bits/stdc++.h>

using namespace std;

long long n, d, a[1000005], p = 1;

int main() {
	cin >> n >> d;
	for (int i = 0; i < n; i++) cin >> a[i];
	sort(a,a+n);
	for (int i = 0, j = 0; i < n; i++) {
		for (; a[i]-d > a[j]; j++);
		p = (p * (i-j+1)) % 1000000009;
	}
	cout << p;
}

• Subtask 1: 5 / 5
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• Subtask 19: 5 / 5
• Subtask 20: 5 / 5