comefrom: <awangdev>238. Product of Array Except Self_1.java
code: private int multiply(int[] rst, int nums[], int i, int carry) {
  
          rst[i] *= carry;
          return carry * nums[i];
      }
masked: private int sample_funcname ( int [ ] var_0 , int var_1 [ ] , int var_2 , int var_3 ) {
    var_0 [ var_2 ] *= var_3 ;
    return var_3 * var_1 [ var_2 ] ;
  }
  