Submission #571780

#	Time	Username	Problem	Language	Result	Execution time	Memory
571780		Blagojce	A Huge Tower (CEOI10_tower)	C++11	100 / 100	122 ms	18564 KiB

tower

#include <bits/stdc++.h>
#define fr(i, n, m) for(int i = (n); i < (m); i ++)
#define st first
#define nd second 
#define all(x) begin(x), end(x)
#define pb push_back
#define all(x) begin(x), end(x)

using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int,int> pii;

const int mxn = 1e6+5;
const ll inf = 1e18;
const ld eps = 1e-13;
const ll mod = 1e9 + 9;

mt19937 _rand(time(0));

int n, k;

int a[mxn];
ll fakt[mxn];
ll tot = 1;
void solve(vector<int> v){
	int p = 0;
	ll ans = 1;
	fr(i, 0, (int)v.size()){
		while(v[i] - v[p] > k){
			++p;
		}
		ans = (ans * (i-p+1)) % mod;
	}
	tot = (tot*ans)%mod;
	
}
int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	cin >> n >> k;
	fakt[0] = 1;
	fr(i, 1, n+1) fakt[i] = (fakt[i-1]*i)%mod;
	
	fr(i, 0, n){
		cin >> a[i];
	}
	sort(a, a + n);
	vector<int> v;
	fr(i, 0, n){
		if(!v.empty() && a[i] - v.back() > k){
			solve(v);
			v.clear();
		}
		v.pb(a[i]);
	}
	solve(v);
	cout<<tot<<endl;
	
	return 0;
}/*
1
3
2 3 -1*/

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 5 / 5
• Subtask 4: 5 / 5
• Subtask 5: 5 / 5
• Subtask 6: 5 / 5
• Subtask 7: 5 / 5
• Subtask 8: 5 / 5
• Subtask 9: 5 / 5
• Subtask 10: 5 / 5
• Subtask 11: 5 / 5
• Subtask 12: 5 / 5
• Subtask 13: 5 / 5
• Subtask 14: 5 / 5
• Subtask 15: 5 / 5
• Subtask 16: 5 / 5
• Subtask 17: 5 / 5
• Subtask 18: 5 / 5
• Subtask 19: 5 / 5
• Subtask 20: 5 / 5