Dot and Cross HackerRank Solution In Python

Problem

dot

The dot tool returns the dot product of two arrays.

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

cross

The cross tool returns the cross product of two arrays.

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

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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

21 23 41 23 4

Sample Output

[[ 7 10] [15 22]]

Solution – Dot and Cross In Python | HackerRank

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