Count the 1s in the binary representation-Skillrack

Count the 1's in the binary representation

A positive integer N is passed as the input.
The program must print the number of 1s in the binary representation of N.

Input Format:
First line contains N.

Output Format:
First line contains the count of 1s in the binary representation of N.


Boundary Conditions:

1 <= N <= 9000000000000000000


Example Input/Output 1:

Input:
22

Output:
3

Explanation:

The binary representation of 22 is 10110. There are three 1s in it.



Code is here!!


import java.util.*;
import java.lang.*;
import java.io.*;
//code by yogesh
class Codechef
{
public static void main (String[] args) throws java.lang.Exception
{
    int i,count=0;
    Scanner sc=new Scanner(System.in);
    String num=Long.toBinaryString(sc.nextLong());
    System.out.println(num);
    char[] ch=num.toCharArray();
    for(i=0;i<ch.length;i++)
        {   
            if(ch[i]=='1')
                count++;
        }
   System.out.print(count);
}
}