#include<iostream>
#include<cstdio>
#include<cstdlib>
using namespace std;
int n,a,b,tmp,mmax=0,t=0;
int w[500005]={0};
int main()
{
	freopen ("dry.in","r",stdin);
	freopen ("dry.out","w",stdout);
	scanf("%d%d%d",&n,&a,&b);
	for (int i=0;i<n;i++)
	{
		scanf("%d",&tmp);
		w[tmp]++;
		if (tmp>mmax)
			mmax=tmp;
	}
	while (1)
	{
		if (w[mmax]==0)
		{
			mmax--;
			if (mmax==0)
				break;
			continue;
		}
		if (mmax-t*a<=0)
			break;
		else
		{
			w[mmax]--;
			t++;
			w[mmax-b]++;
		}
	}
	cout<<t;
	return 0;
}