Submission #1262829

#	Time	Username	Problem	Language	Result	Execution time	Memory
1262829		farbodchr	A Huge Tower (CEOI10_tower)	C++20	100 / 100	96 ms	2632 KiB

tower

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int mod = 1000000009;
int n, d;
int A[1000000];
ll ans = 1;

int main() {
    ios_base::sync_with_stdio(0); cin.tie(0);
    cin >> n >> d;
    for (int i = 0; i < n; i++) cin >> A[i];

    sort(A, A + n);
    
    for (int i = 0; i < n; i++) {
        int x = lower_bound(A, A + n, A[i] - d) - A;
        ans = ans * (i + 1ll - x) % mod;
    }

    cout << ans << "\n";
    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
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• Subtask 10: 5 / 5
• Subtask 11: 5 / 5
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• Subtask 15: 5 / 5
• Subtask 16: 5 / 5
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• Subtask 18: 5 / 5
• Subtask 19: 5 / 5
• Subtask 20: 5 / 5