function main() {
    const n = parseInt(readLine().trim(), 10);
    const b = n.toString(2);
    const myArray = b.split('0').map((x) => x.length);
    console.log(Math.max(...myArray));
}

binary_str = bin(n)[2:]

target_no = "1"
current_count = 0
max_count = 0

for x in binary_str:
    if x == target_no:
        current_count += 1
        if current_count>max_count:
            max_count = current_count
        else:
            max_count
    else:
        current_count = 0
print(max_count)

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();
    }
}

import re
print(len(max(re.findall(r"(1+)",bin(int(input().strip()))[2:]))))