Submission #208499

#	Time	Username	Problem	Language	Result	Execution time	Memory
208499		amoo_safar	A Huge Tower (CEOI10_tower)	C++14	100 / 100	185 ms	8288 KiB

tower

//khodaya khodet komak kon
#include <bits/stdc++.h>

#define F first
#define S second
#define pb push_back
#define all(x) x.begin(), x.end()
#pragma GCC optimise ("ofast")
#pragma GCC optimise("unroll-loops")

using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef vector<int> vi;

const int N = 1000000 + 10;
const ll MOD = 1000000000 + 9;
const ll INF = 1000000000000000000;
const ll LOG = 25;

int n, D, a[N], ans = 1;

int32_t main(){
	ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
	cin >> n >> D;
	for (int i = 1; i <= n; i++){
		cin >> a[i];
	}
	sort(a + 1, a + n + 1);
	int cnt = 0;
	for (int i = n; i >= 1; i--){
		int koj = upper_bound(a + 1, a + n + 1, a[i] + D) - a;
		koj --;
		//cout << koj << '\n';
		int ted = koj - (i + 1) + 2;
		ans = (ans * 1ll * (ted))%MOD;
		//cout << ted << '\n';
		//cout << ans << '\n';
		cnt++;
	}
	cout << ans;







	return 0;
}

Compilation message (stderr)

tower.cpp:8:0: warning: ignoring #pragma GCC optimise [-Wunknown-pragmas]
 #pragma GCC optimise ("ofast")
 
tower.cpp:9:0: warning: ignoring #pragma GCC optimise [-Wunknown-pragmas]
 #pragma GCC optimise("unroll-loops")

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 5 / 5
• Subtask 4: 5 / 5
• Subtask 5: 5 / 5
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• Subtask 20: 5 / 5