HackerRank Concatenate problem solution in Python

HackerRank Concatenate problem solution in Python – In this Concatenate problem in Python programming, you are given two integer arrays of size N X P and M X P ( N & M are rows, and P is the column). Your task is to concatenate the arrays along axis 0.

Concatenate

Two or more arrays can be concatenated together using the concatenate function with a tuple of the arrays to be joined:

import numpy

array_1 = numpy.array([1,2,3])
array_2 = numpy.array([4,5,6])
array_3 = numpy.array([7,8,9])

print numpy.concatenate((array_1, array_2, array_3))    

#Output
[1 2 3 4 5 6 7 8 9]

If an array has more than one dimension, it is possible to specify the axis along which multiple arrays are concatenated. By default, it is along the first dimension.

import numpy

array_1 = numpy.array([[1,2,3],[0,0,0]])
array_2 = numpy.array([[0,0,0],[7,8,9]])

print numpy.concatenate((array_1, array_2), axis = 1)   

#Output
[[1 2 3 0 0 0]
 [0 0 0 7 8 9]]

HackerRank Concatenate problem solution in Python 2.

import numpy
N, M, P = map(int, raw_input().split())
n = numpy.array([map(int, raw_input().split()) for _ in range(N)])
m = numpy.array([map(int, raw_input().split()) for _ in range(M)])
print numpy.concatenate((n, m))

Concatenate problem solution in Python 3.

import numpy as np
a, b, c = map(int,input().split())
arrA = np.array([input().split() for _ in range(a)],int)
arrB = np.array([input().split() for _ in range(b)],int)
print(np.concatenate((arrA, arrB), axis = 0))

Problem solution in pypy programming.

# Enter your code here. Read input from STDIN. Print output to STDOUT

import numpy
n, m, p=map(int, raw_input().split())
g=[]
for i in range(n+m):
    g.append(map(int, raw_input().split()))
print numpy.reshape(g, (n+m, p))

Problem solution in pypy3 programming.

# Enter your code here. Read input from STDIN. Print output to STDOUT
def matrix_printer(arr,n,m):
    for i in range(n):
        if i == 0:
            print('[[' + ' '.join(map(str, arr[0][0:m])) + ']')
        elif i == n-1:
            print(' [' + ' '.join(map(str, arr[n-1][0:m])) + ']]')
        else:
            print(' [' + ' '.join(map(str, arr[i][0:m])) + ']')
                
n,m,p = map(int, input().split())
lst=[]
for _ in range(n+m):
    lst.append(list(map(int,input().split())))

matrix_printer(lst,(n+m),p)