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

public class Main {
    static char[] values;
    static int[][] dp;
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner();
        values = sc.next().toCharArray();
        int length = values.length;
        dp = new int[2][length];
        if (dfw(0, length - 1) == 2) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
    
    static int dfw(int level, int idx) {
        if (idx == 0) {
            return 1;
        }
        if (dp[level][idx] == 0) {
            if (level == 0) {
                if (values[idx] == '0') {
                    dp[level][idx] = dfw(0, idx - 1);
                } else {
                    dp[level][idx] = Math.min(dfw(1, idx - 1), dfw(0, idx - 1)) + 1;
                }
            } else {
                if (values[idx] == '1') {
                    dp[level][idx] = dfw(1, idx - 1);
                } else {
                    dp[level][idx] = Math.min(dfw(1, idx - 1), dfw(0, idx - 1)) + 1;
                }
            }
        }
        return dp[level][idx];
    }

}
class Scanner {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    StringTokenizer st = new StringTokenizer("");
    StringBuilder sb = new StringBuilder();
    
    public Scanner() throws Exception {
        
    }
    
    public int nextInt() throws Exception {
        return Integer.parseInt(next());
    }
    
    public long nextLong() throws Exception {
        return Long.parseLong(next());
    }
    
    public double nextDouble() throws Exception {
        return Double.parseDouble(next());
    }
    
    public String next() throws Exception {
        while (!st.hasMoreTokens()) {
            st = new StringTokenizer(br.readLine());
        }
        return st.nextToken();
    }
    
}