import java.io.*;
import java.util.*;
import java.util.function.*;
import java.util.stream.*;

public class Main {
    static TreeSet<Integer> enables = new TreeSet<>();
    static Set<Integer> disables = new HashSet<>();
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner();
        int a = sc.nextInt();
        int b = sc.nextInt();
        while (a-- > 0) {
            enables.add(sc.nextInt());
        }
        boolean enable = true;
        while (b-- > 0 && enable) {
            enable = getEnable(sc.nextInt());
        }
        System.out.println(enable ? "Yes" : "No");
    }
    
    static boolean getEnable(int x) {
        if (enables.contains(x)) {
            return true;
        }
        if (disables.contains(x)) {
            return false;
        }
        Integer key = x;
        while ((key = enables.lower(key)) != null) {
            if (getEnable(x - key)) {
                enables.add(x);
                return true;
            }
        }
        disables.add(x);
        return false;
    }
}
class Scanner {
    BufferedReader br;
    StringTokenizer st = new StringTokenizer("");
    StringBuilder sb = new StringBuilder();
    
    public Scanner() {
        try {
            br = new BufferedReader(new InputStreamReader(System.in));
        } catch (Exception e) {
            
        }
    }
    
    public int nextInt() {
        return Integer.parseInt(next());
    }
    
    public long nextLong() {
        return Long.parseLong(next());
    }
    
    public double nextDouble() {
        return Double.parseDouble(next());
    }
    
    public String next() {
        try {
            while (!st.hasMoreTokens()) {
                st = new StringTokenizer(br.readLine());
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            return st.nextToken();
        }
    }
    
}