Submission #480391

#	Time	Username	Problem	Language	Result	Execution time	Memory
480391		nehasane	A Huge Tower (CEOI10_tower)	C++14	5 / 100	301 ms	2636 KiB

tower

#include <bits/stdc++.h>
using namespace std;
long long factorial(int s){
    long long ans = 1;
    for (int i = s; i >= 1; i--)
        ans *= i;
    return ans;
}
int main()
{
    int n, d;
    cin >> n >> d;
    vector <int> blocks(n);
    for (int i = 0; i < n; i++)
        cin >> blocks[i];
    sort(begin(blocks), end(blocks));
    long long ans = 1;
    int l = 0, r = 0;
    while (r < n){
        if (blocks[l] + d >= blocks[r]){
            r++;
            continue;
        }else{
            ans *= factorial(r-l);
            l = r;
            continue;
        }
    }
    cout << ans * factorial(r-l) << '\n';
}

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