Concatinate (python hackerrank)

import numpy as np

elements = input().split()
N = int(elements[0])
M = int(elements[1])
P = int(elements[2])

lt = []
for i in range(N):
    N_ = input().split()
    n = list(map(int, N_))
    lt.append(n)

mt = []
for i in range(M):
    M_ = input().split()
    m = list(map(int, M_))
    mt.append(m)

result = np.concatenate((lt, mt)).reshape(N+M, P)
print(result)
