Submission #555948

#	Time	Username	Problem	Language	Result	Execution time	Memory
555948		blue	A Huge Tower (CEOI10_tower)	C++17	100 / 100	111 ms	8736 KiB

tower

#include <iostream>
#include <algorithm>
#include <vector>
using namespace std;

using vi = vector<int>;
using ll = long long;


const ll mod = 1'000'000'009LL;

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

	int N, D;
	cin >> N >> D;

	vi H(N);
	for(int i = 0; i < N; i++)
		cin >> H[i];
	sort(H.begin(), H.end());

	ll res = 1;

	int j = 0;

	int l = 0;
	for(int r = 0; r < N; r++)
	{
		while(H[l] + D < H[r])
			l++;

		res = (res * (r-l+1))%mod;
	}

	cout << res << '\n';
}

Compilation message (stderr)

tower.cpp: In function 'int main()':
tower.cpp:27:6: warning: unused variable 'j' [-Wunused-variable]
   27 |  int j = 0;
      |      ^

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