#include <cstdlib>
#include <cmath>
#include <cstring>
#include <cstdio>
#include <string>
#include <iostream>
#include <set>
#include <algorithm>
using namespace std;
multiset<long long > s;
multiset <long long> ::iterator x,y;
long long a,b,c,d,l,m,n,t;
int main(void)
{
    freopen ("dry.in","r",stdin);
    freopen ("dry.out","w",stdout);
    scanf("%d%d%d",&a,&b,&c);
    m=0;
    for (d=0;d<a;d++)
    {
        scanf("%d",&l);
        s.insert(l);
    }
    x=s.upper_bound(m);
    while (x!=s.end())
    {
        t++;
        y=s.end();
        y--;
        n=*y;
        n-=c;
        s.erase(y);
        s.insert(n);
        m+=b;
        x=s.upper_bound(m);
    }
    printf("%d",t);
    fclose(stdin);
    fclose(stdout);
    return 0;
}