import numpy as np
A = np.array([[1, 2], [2, 2]])
B = np.linalg.inv(A)
r = sum(np.diag(A@B))
print(r)

~ord('Ю') + ord('Я')

d = {10: 1}
print(sum(d.popitem()) + sum(d))

s = bytearray("hello")
print(len(s))

import numpy as np
array = np.arange(4)
array = array[::-1]
print(array)

a = ([1], 2)

a = [1]
a.insert(0, a)
a[0][0][-2][-2].append([2])
a[0][0][-1].append(3)
a[0][0][0][0][-1][0] *= -1
s = a[0][1] + a[0][0][2][-1] + a[0][0][2][-2]
print(s)

import numpy as np
m = np.arange(4).reshape(2, 2)
d = np.fliplr(m).diagonal()
print(sum(d), np.trace(m))

s = bytearray("hello", encoding="ascii")