import java.io.IOException;
import java.io.InputStream;
import java.util.Arrays;
import java.util.NoSuchElementException;
import java.util.Scanner;

public class Main {	
	public static void main(String[] args) {
		//long t = System.currentTimeMillis();
		new Main().run();
		//System.err.println(System.currentTimeMillis() - t);
	}
	
	int get(int[] D,int s) {
		int ret=100;
		for(int i=0;i<D.length;++i) {
			if((s>>i)%2==0)continue;
			if(D[i]<0)ret+=100;
		}
		return ret;
	}
	
	void run() {
		Scanner sc=new Scanner(System.in);
		int N=sc.nextInt();
		int[] D=new int[N];
		for(int i=0;i<N;++i)D[i]=sc.nextInt();
		int[] dp=new int[1<<N];
		dp[0]=100;
		for(int s=0;s<1<<N;++s) {
			if(dp[s]==0)continue;
			for(int next=0;next<N;++next) {
				if((s>>next)%2==1)continue;
				int ns=s|1<<next;
				int HP=get(D,s);
				if(D[next]>0) {
					dp[ns]=Math.max(dp[ns], Math.min(HP,dp[s]+D[next]));
				}else {
					if(dp[s]+D[next]<=0)continue;
					dp[ns]=Math.max(dp[ns], dp[s]+D[next]);
				}
			}
		}
		System.out.println(dp[(1<<N)-1]);
	}

	
	
	static void tr(Object... objects) {
		System.out.println(Arrays.deepToString(objects));
	}

}
	
	
class FastScanner {
    private final InputStream in = System.in;
    private final byte[] buffer = new byte[1024];
    private int ptr = 0;
    private int buflen = 0;
    private boolean hasNextByte() {
        if (ptr < buflen) {
            return true;
        }else{
            ptr = 0;
            try {
                buflen = in.read(buffer);
            } catch (IOException e) {
                e.printStackTrace();
            }
            if (buflen <= 0) {
                return false;
            }
        }
        return true;
    }
    private int readByte() { if (hasNextByte()) return buffer[ptr++]; else return -1;}
    private static boolean isPrintableChar(int c) { return 33 <= c && c <= 126;}
    private void skipUnprintable() { while(hasNextByte() && !isPrintableChar(buffer[ptr])) ptr++;}
    public boolean hasNext() { skipUnprintable(); return hasNextByte();}
    public String next() {
        if (!hasNext()) throw new NoSuchElementException();
        StringBuilder sb = new StringBuilder();
        int b = readByte();
        while(isPrintableChar(b)) {
            sb.appendCodePoint(b);
            b = readByte();
        }
        return sb.toString();
    }
    public long nextLong() {
        if (!hasNext()) throw new NoSuchElementException();
        long n = 0;
        boolean minus = false;
        int b = readByte();
        if (b == '-') {
            minus = true;
            b = readByte();
        }
        if (b < '0' || '9' < b) {
            throw new NumberFormatException();
        }
        while(true){
            if ('0' <= b && b <= '9') {
                n *= 10;
                n += b - '0';
            }else if(b == -1 || !isPrintableChar(b)){
                return minus ? -n : n;
            }else{
                throw new NumberFormatException();
            }
            b = readByte();
        }
    }
    
    public int nextInt() {
    	return (int)nextLong();
    }
}