public class Solution {
    public static void main(String[] args) throws IOException {
        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));

        int n = Integer.parseInt(bufferedReader.readLine().trim());
   
        int max = 0; 
        int count = 0;

    ArrayList <Integer> binary = new ArrayList<>();
    while (n>0) {
        int remainder = n%2;
        n=n/2;
        binary.add(remainder);
    }
   for(int i = 0; i<binary.size();i++)
   {
       int position = binary.get(i);
       if(position == 1)
       {
           count++;
             max = Math.max(count, max);
       }
       else
       {           
         count = 0;  
       } 
   }      
   System.out.println(max);
   
        bufferedReader.close();
    }
}