Dot and Cross in Python HackerRank Solution

Hello Programmers, In this post, you will know how to solve the Dot and Cross in Python HackerRank Solution. This problem is a part of the HackerRank Python Programming Series.

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One more thing to add, don’t directly look for the solutions, first try to solve the problems of Hackerrank by yourself. If you find any difficulty after trying several times, then you can look for solutions.

Dot and Cross in Python HackerRank Solutions

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dotThe dot tool returns the dot product of two arrays.

import numpy
A = numpy.array([ 1, 2 ])
B = numpy.array([ 3, 4 ])
print numpy.dot(A, B)       #Output : 11

CrossThe cross tool returns the cross product of two arrays.

import numpy
A = numpy.array([ 1, 2 ])
B = numpy.array([ 3, 4 ])
print numpy.cross(A, B)     #Output : -2

Task :

You are given two arrays A and B. Both have dimensions of NXN.
Your task is to compute their matrix product.

Input Format :

The first line contains the integer N.
The next N lines contains N space separated integers of array A.The following N lines contains N space separated integers of array B. 

Output Format :

Print the matrix multiplication of A and B.

Sample Input :

2
1 2
3 4
1 2
3 4

Sample Output :

[[ 7 10]
 [15 22]]

Dot and Cross in Python HackerRank Solutions

import numpy
n = int(input())
a = numpy.array([input().split() for _ in range(n)], int)
b = numpy.array([input().split() for _ in range(n)], int)
print(numpy.dot(a, b))

Disclaimer: The above Problem (Dot and Cross in Python) is generated by Hackerrank but the Solution is Provided by BrokenProgrammers. This tutorial is only for Educational and Learning purposes.

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