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

        int n = Integer.parseInt(bufferedReader.readLine().trim());
        
        StringBuffer strBase10 = new StringBuffer();
        int maxOnes = 0;
        int onesFound = 0;
        
        while(n>=1){
            double x = n;
            if(x%2==0){
                strBase10.append("0");
                if(onesFound>maxOnes){
                    maxOnes = onesFound;
                }
                onesFound = 0;
            }else{
                onesFound++;
                strBase10.append("1");
            }
            n = n/2;             
        }
        
        if(onesFound>maxOnes){
            maxOnes = onesFound;
        }
       
       System.out.println(maxOnes);
        
    }