#include<bits/stdc++.h>
#define int long long
using namespace std;
int n,k,X,x;
int a[200010],s[200010];
int read(){
    int r=0,f=1;char c=getchar();
    while(c<'0'||c>'9'){if(c=='-')f=-1;c=getchar();}
    while(c<='9'&&c>='0') r=(r<<1)+(r<<3)+c-'0',c=getchar();
    return r*f;
}
void put(int x){
    if(x<0){putchar('-');x=~x+1;}
    if(x>9) put(x/10);
    putchar(x%10+'0');
}
signed main(){
    n=read(),k=read(),X=read();
    for(int i=1;i<=n;i++) a[i]=read();
    sort(a+1,a+1+n);
    for(int i=1;i<n;i++) s[i]=a[i+1]-a[i];
    sort(s+1,s+n);
    for(int i=1;i<n;i++){
        if(s[i]<=X) continue;
        int cnt=(s[i]-1)/X;
        k-=cnt;
        if(k<0){x=i;break;}
    }
    if(!x) return puts("1"),0;
    put(n-x+1),puts("");
    return 0;
}