#include <bits/stdc++.h>
using namespace std;
int a[1000];
int n;
int m;
int main(){
    cin>>n>>m;
    for(int i=1;i<=n;i++){
        cin>>a[i];
    }
    int k=10000;
    for(int j=1;j<=n;j++){
        if(a[j]<k){
            k=a[j];
            
        }
    }
    int left,right;
    left=k;
    double s;
    for(int z=1;z<=n;z++){
        s+=a[z];
    }
    right=s;
    int mid;
    int cnt;
    for(int h=1;h<=n;h++){
        mid=(right-left)/2;
        if(s/mid<m){
            mid=mid*3;
        }else if(s/mid==m){
            cout<<mid;
            break; 
        }
    }
    
    
    return 0;
}