Submission #1172122

#	Time	Username	Problem	Language	Result	Execution time	Memory
1172122		blorg	A Huge Tower (CEOI10_tower)	C++20	30 / 100	170 ms	5144 KiB

tower

// Source: https://usaco.guide/general/io

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

int MOD = 1e9+9;

int main() {
	int n, d;
    cin>>n>>d;
    vector<int> t(n);
    for (int i = 0; i<n; i++) cin>>t[i];
    sort(t.begin(), t.end());
    vector<int> b(n);
    b[0]=0;
    int ans = 1;
    int j = 0;
    for (int i = 1; i<n; i++) {
        while (t[i]-t[j]>d) {
            j++;
        }
        b[i]=i-j;
        ans*=((b[i]+1)%MOD);
        // cout<<b[i]<<" ";
        // cout<<ans<<endl;
    }
    cout<<ans<<endl;
}

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 5 / 5
• Subtask 4: 5 / 5
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• Subtask 10: 5 / 5
• Subtask 11: 5 / 5
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• Subtask 20: 0 / 5