Submission #856864

#	Time	Username	Problem	Language	Result	Execution time	Memory
856864		Euclid73	A Huge Tower (CEOI10_tower)	C++17	100 / 100	204 ms	10504 KiB

tower

#include <bits/stdc++.h>
using namespace std;

#define ll long long

const ll MOD=1e9+9;

int main()
{
    ll n, d;
    cin >> n >> d;
    ll a[n];
    for (int i=0; i<n; i++)
    {
        cin >> a[i];
    }
    sort(a, a+n);
    ll r=0, ans=1;
    for (ll i=0; i<n; i++)
    {
        while (r+1<n && a[r+1]<=a[i]+d)
        {
            r++;
        }
        ans=ans*(r-i+1);
        ans=ans%MOD;
    }
    cout << ans << "\n";
}

• 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