Submission #856619

#	Time	Username	Problem	Language	Result	Execution time	Memory
856619		HanavM	A Huge Tower (CEOI10_tower)	C++17	100 / 100	215 ms	10504 KiB

tower

// Source: https://usaco.guide/general/io

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
ll mod = 1e9 + 9;

int main() {
	ll n, d; cin >> n >> d;
	vector <ll> blocks(n);
	for (int i=0;i<n;i++){
		cin >> blocks[i];
	}
	int left = 0; int right = 0;
	ll ans = 1;
	sort(begin(blocks),end(blocks));
	for (int i=1;i<n;i++){
		ll constant = blocks[i] - d;
		while (left < n){
			if (blocks[left] < constant){
				left++;
			}
			else{
				break;
			}
		}
		right ++;
		// cout <<i <<" " << left << " " << right << endl;
		if (left != right){
			ans = ans * (right - left + 1);
			ans = ans % mod;
		}
	}
	cout << ans % mod;
}

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 5 / 5
• Subtask 4: 5 / 5
• Subtask 5: 5 / 5
• Subtask 6: 5 / 5
• Subtask 7: 5 / 5
• Subtask 8: 5 / 5
• Subtask 9: 5 / 5
• Subtask 10: 5 / 5
• Subtask 11: 5 / 5
• Subtask 12: 5 / 5
• Subtask 13: 5 / 5
• Subtask 14: 5 / 5
• Subtask 15: 5 / 5
• Subtask 16: 5 / 5
• Subtask 17: 5 / 5
• Subtask 18: 5 / 5
• Subtask 19: 5 / 5
• Subtask 20: 5 / 5