package code;
/*
 * 191. Number of 1 Bits
 * 1
 * Easy
 * Bit Manipulation
 * 
 * Tips
 */
public class lc191 {
    // you need to treat n as an unsigned value
    public int hammingWeight(int n) {
        int sum = 0;
        int a = 1;
        while(a!=0){
            int b = n&a;
            if(b!=0) sum += 1;
            a