class HelloWorld {
    public static void main(String[] args) {
         Scanner in = new Scanner(System.in);
        int n = in.nextInt();
        int c = 0;
        int res = 0;
      //移位等于1累加  遇到0 置零
        while (n!=0) {
            if ((n & 1) == 1) {
                c++;                
            } else {                
                c=0;
            }
          res = Math.max(res,c);
            n>>=1;
        }
        System.out.println(res); 
    }
}