Submission #1262857

#	Time	Username	Problem	Language	Result	Execution time	Memory
1262857		ermiooo158	A Huge Tower (CEOI10_tower)	C++17	0 / 100	11 ms	1864 KiB

tower

//Time Complexity: O(N)
//Space Complexity: O(N)
#include <bits/stdc++.h>
#define endl '\n'
#define endll '*' << endl
#define endlll "&" << endl
#define ll long long
#define pii pair<ll, ll>
#define F first
#define S second
#define pb push_back
#define all(x) (x).begin(), (x).end()
#define flush cout.flush
//#define int long long //fast debug
#define migmig ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0)
using namespace std;

int constexpr maxn = 2e5 + 15, mod = 1e9 + 7;
ll a[maxn], n, d, ans = 1, p1 = 1, p2 = 1;

void findAns() {
	sort(a, a + n);
	while(p1 <= n) {
		while(p2 + 1 <= n && a[++p2] <= a[p1] + d)
			continue;//, cout << p2 << "->";
		ans *= (p2 - p1 + 1);
		//cout << p1 << "---" << p2 << endll;
		p1++;
	}
	cout << ans << endl;
}

void read_input() {
	cin >> n >> d;
	for(int i = 1;i <= n;i++)
		cin >> a[i];
}

int main(){
	migmig;
	//precalc();
	int t = 1;//cin >> t;
	while(t--){
		read_input();
		findAns();
		//debugg();
	}
}

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