Submission #405686

#	Time	Username	Problem	Language	Result	Execution time	Memory
405686		four_specks	A Huge Tower (CEOI10_tower)	C++17	100 / 100	204 ms	8732 KiB

tower

#include <bits/stdc++.h>

using namespace std;

const int mod = 1'000'000'009;

void solve()
{
    int n;
    long d;
    cin >> n >> d;

    vector<int> a(n);
    for (int i = 0; i < n; i++)
        cin >> a[i];
    sort(a.begin(), a.end());

    long c = 1;
    for (int i = 0; i < n; i++)
    {
        int x = i + 1 - (lower_bound(a.begin(), a.end(), a[i] - d) - a.begin());
        c *= x;
        c %= mod;
    }

    cout << c << '\n';
}

int main()
{
    ios_base::sync_with_stdio(false), cin.tie(nullptr);

    solve();

    return 0;
}

• 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