[HackerRank] 08. Mean, Var and Std

import numpy as np

np.set_printoptions(legacy='1.13')

my_arr = []
N, M = input().split()
for _ in range(int(N)):
    my_arr.append(list(map(int, input().split())))

my_arr = np.array(my_arr)
print(np.mean(my_arr, axis=1))
print(np.var(my_arr, axis=0))
print(np.std(my_arr))