Cau 2

def two_dimension_array(arr)
    arr1 = []
    arr2 = []
    n = arr.length
    for i in 0..n - 1
        for j in 0..n - 1
            arr2 << arr[n - j - 1][i]
        end
        arr1 << arr2.dup
        arr2.clear
    end
    arr1
end

arr = [[1,2,3], [4,5,6], [7,8,9]]
puts two_dimension_array(arr).map(&:inspect)