Problem 2799. Multiply Column

Given two input, one matrix and one scalar number

For example

A is a matrix given

 A = [ 1 2 2 5 2 5
       2 3 4 6 4 6
       3 4 6 1 5 7 ]

and n=2. The columns of A divide two groups first

and second column multiply each other and then

third and forth column multiply, and so on.

The result will be

 Result =     
  [ 2 10 10
    6 24 24
    12 6 35 ]

When n=3, the columns of A divide three groups

first and second third column multiply each other,

and so on.

 Result =
  [ 4    50
   24   144
   72    35]