// Hydro submission #65a8e8231786d043da9540a2@1705568292022
#include <bits/stdc++.h>
using namespace std;
int n,x,i,sw,sum=0;
int a[105];
int main (){
freopen("input.txt","r",stdin);
freopen("output.txt","w",stdout);
cin>>n>>x;
for (i=1;i<=n;i++){
cin>>sw;
a[i]=sw*(n-i+1);
// cout<<a[i]<<endl<<n-i+1<<endl;
}
sort (a,a+n+1);
for (i=1;i<=n;i++){
sum+=a[i];
if (sum>x){
cout<<i-1;
return 0;
}
// cout<<sum<<endl;
}
cout<<i-1;
return 0;
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