#include<iostream>
using namespace std;
int a[10005],n,m;
int sum;
int main(){
    cin>>n>>m;
    for(int i=1;i<=n;i++){
        cin>>a[i];
    }
    for(int i=1;i<=n;i++){
        if(m<a[i])continue;
        sum+=a[i];
        m-=a[i];
    }
    cout<<sum*0.12;
    return 0;
}