Submission #1193132

#	Time	Username	Problem	Language	Result	Execution time	Memory
1193132		Adeeb_obedo	A Huge Tower (CEOI10_tower)	C++20	100 / 100	110 ms	5288 KiB

tower

#include<bits/stdc++.h>
#define int long long
#define ld   double
#define _1 first
#define _2 second
#define yes cout<<"Yes\n"
#define nah cout<<"No\n"
#define FFF ios_base::sync_with_stdio(0);cin.tie(0);
#define ipr pair<int,int>
#define ret return
#define intt int32_t
#define mid ((l+r)/2)
#define pb push_back
#define lll __int128
using namespace std;
int tst, ts;
const intt mo = 1e9+9, dx[] = {-1, 1, 0, 0,-1,-1,1,1}, dy[] = {0, 0, -1, 1,-1,1,-1,1};
int mul( int x, int y ) {
    ret ( ( x % mo ) * ( y % mo ) ) % mo;
    ret x*y;
}
int pwo( int x, int y ) {
    int res = 1;
    for( int i = 63; i + 1; i-- )
        res = mul( res, res * ( ( 1ll << i )&y ? x : 1 ) );
    ret res;
}
int dvii( int x, int y ) {
    ret mul( x, pwo( y, mo - 2 ) );
}
int oo( char x ) {
    ret ( int )x - '0';
}
int lgg( int x, int y ) {
    int u = 0;
    while( x ) {
        u++;
        x /= y;
    }
    ret u;
}
int mun( int x, int y ) {
    while( x < y )x += mo;
    ret ( x - y ) % mo;
}
int add( int x, int y ) {
    ret x + y - ( mo * ( x + y >= mo ) );
    ret x + y;
}
int lcm( int x, int y ) {
    ret ( x * y ) / __gcd( x, y );
} 
#define endl '\n';
const int M =4007, N = 1e6 + 7, N2 = 5e3 + 7, inf = 2e18 + 7;
int n,m;
string s;
void solve(){
	cin>>n>>m;
	int a[n+7];
	for(int i=0;i<n;i++)
		cin>>a[i];
	sort(a,a+n);
	reverse(a,a+n);
	int ans=1;
	for(int i=0;i<n;i++){
		int l=i,r=n;
		while(r-l>1)
			if(a[mid]+m<a[i])
				r=mid;
			else
				l=mid;
		ans=mul(ans,r-i);
	}
	cout<<ans<<endl;
}
intt main() {
	FFF
    //freopen("revegetate.in", "r", stdin);
    //freopen("revegetate.out", "w", stdout);
	
    tst = 1;
	//cin >> tst;
    for ( ts = 1; ts <= tst; ts++ ) {
        solve();
    }
}

• 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