comefrom: <qiyuangong>461_Hamming_Distance_1.java
code: public int hammingDistance(int x, int y) {
          return Integer.bitCount(x ^ y);
      }
masked: public int sample_funcname ( int var_0 , int var_1 ) {
    return Integer . bitCount ( var_0 ^ var_1 ) ;
  }
  