sum

The sum tool returns the sum of array elements over a given axis.

import numpy

my_array = numpy.array([ [1, 2], [3, 4] ])

print numpy.sum(my_array, axis = 0) #Output : [4 6]
print numpy.sum(my_array, axis = 1) #Output : [3 7]
print numpy.sum(my_array, axis = None) #Output : 10
print numpy.sum(my_array) #Output : 10

By default, the axis value is None. Therefore, it performs a sum over all the dimensions of the input array.

prod

The prod tool returns the product of array elements over a given axis.

import numpy

my_array = numpy.array([ [1, 2], [3, 4] ])

print numpy.prod(my_array, axis = 0) #Output : [3 8]
print numpy.prod(my_array, axis = 1) #Output : [ 2 12]
print numpy.prod(my_array, axis = None) #Output : 24
print numpy.prod(my_array) #Output : 24

By default, the axis value is None. Therefore, it performs the product over all the dimensions of the input array.

Task

You are given a 2-D array with dimensions $N$X$\mbox{M}$.

Your task is to perform the $\textit{sum}$ tool over axis $\mbox{o}$ and then find the $\textit{product}$ of that result.

Input Format

The first line of input contains space separated values of $N$ and $\mbox{M}$.

The next $N$ lines contains $\mbox{M}$ space separated integers.

Output Format

Compute the sum along axis $\mbox{o}$. Then, print the product of that sum.

Sample Input
2 2
1 2
3 4

Sample Output
24

Explanation

The sum along axis $\mbox{o}$ = [$\begin{array}{c}A\end{array}$ $\boldsymbol{6}$]

The product of this sum = $24$

见题面

见题面