/* package whatever; // don't place package name! */

import java.util.*;
import java.lang.*;
import java.io.*;

/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	
	public static void main (String[] args) throws java.lang.Exception
	{

	    Scanner sc = new Scanner(System.in);

	    // N(立候補者人数)
	    int n = sc.nextInt();
	    //System.out.println("n=" + n);

	    // 票合計
		int hg = 0;
		
	    // 票配列
	    int hs[];
        hs = new int[n]; 

        int index = 0;
	    while((sc.hasNext()) && (index < n + 1)){
	        int s = sc.nextInt();
	        hs[index] = s;
	        //System.out.println("hs[index]=" + hs[index]);
            hg += s;
		    index++;
	    }
    
	    //System.out.println("hg=" + hg);
	    
	    // 票基準
		int hk = (int)(hg * 0.1);
		//System.out.println("hk=" + hk);
		
		// 供託金合計
		int kg = 0;
	    for (int i = 0; i < n; i++){
	    	// 票基準以下は、供託金となる
		  	if (hs[i] <= hk ) {
		  		kg += 30;
		  	}
		}
		
		System.out.println(kg);
	}
	
}