comefrom: <awangdev>Power of Three_2.java
code: public boolean isPowerOfThree(int n) {
          if (n <= 0) {
              return false;
          }
          if (n == 1) {
              return true;
          }
          if (n % 3 != 0) {
              return false;
          }
          return isPowerOfThree(n / 3);
      }
masked: public boolean sample_funcname ( int n ) {
    if ( n <= 0 ) {
      return false ;
    }
    if ( n == 1 ) {
      return true ;
    }
    if ( n % 3 != 0 ) {
      return false ;
    }
    return isPowerOfThree ( n / 3 ) ;
  }
  