Submission #672361

#	Time	Username	Problem	Language	Result	Execution time	Memory
672361		scrge	A Huge Tower (CEOI10_tower)	C++17	100 / 100	254 ms	10500 KiB

tower

#include <bits/stdc++.h>
#define int long long
#define MOD (int) 1e9+9
using namespace std;

int n, d;
vector<int> a;

signed main(){
	cin >> n >> d;
	a.resize(n);
	for(int i = 0; i < n; i++)
		cin >> a[i];
	sort(a.rbegin(), a.rend());
	int j = 0;
	int ans = 1;
	for(int i = 0; i < n; i++){
		while(j+1 < n && a[j+1]+d >= a[i]) j++;
		ans *= j+1-i;
		ans %= MOD;
	}

	cout << ans;
}

• 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