Submission #1123270

#	Time	Username	Problem	Language	Result	Execution time	Memory
1123270		qrn	A Huge Tower (CEOI10_tower)	C++20	100 / 100	106 ms	5188 KiB

tower

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

#define SPEED                     \
    ios_base::sync_with_stdio(0); \
    cin.tie(NULL);                \
    cout.tie(NULL);

#define pb push_back
#define ALL(x) x.begin(), x.end()
#define intt long long
#define int long long
#define endl "\n"

const intt mod = 1e9 + 9;

void solve()  {
    intt n,  k, ans = 1;
    cin >> n >> k;

    vector<intt> a(n);
    for(int i = 0; i < n; i++) cin >> a[i];

    intt l = 0, r = 0;
    sort(ALL(a));
    while(l < n) {
        while(r < n && a[r] - a[l] <= k) r++;
        ans *= (r - l);
        ans %= mod;
        l++;
    }
    cout << ans << endl;
}

signed main() {
    SPEED;
    intt tst = 1;
    // cin >> tst;
    while (tst--) {
        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