#1
R = [45, 84, 10, 58]
A = R
R[0] = 54
print(A[0] + R[0])
answer: 108

#2
#срез
a = []
for i in range (5):
    x = int(input())
    a.append(x)
print(len(a), sum(a))

#copy
b = a.copy()
print(len(b), sum(b))

#поверхностное
import copy
b = copy.copy(a)
print(len(b), sum(b))

#глубокое
c = []
for i in a:
    c.append(i)
print(len(c), sum(c))

#def
def stroka(a):
    x = []
    for i in a:
        x.append(int(i))
    return x

a = input().split()
print(len(stroka(a)), sum(stroka(a)))
answer: 5, 35

#3
AR = [[90, 99, 109, 119]] * 4
AR[0][0], AR[3][3] = 890, 76
print(AR[1][0] + AR[2][3])
answer: 966

#4
animals = ["cat", "cat", "dog", "dog", "bird", "capybara", "capybara", "capybara"]
a = {}
for i in animals:
    a[i] = len(i)
print(a)
answer: {'cat': 3, 'dog': 3, 'bird': 4, 'capybara': 8}

#5
import sys

backpack = ["capybara", "capyraba", "capyba", "capyba", "capybara",
             2999, 2999, "capybara", [7, 7, 7], [7, 7, 7], [7, 7, 7],
             [7, 7, 7]] + [[8, 8]] * 5
print(sys.getrefcount(backpack[2]))
5 35

#6
import copy

salad = ['lettuce', 'chicken', 'cheese', 'sauce', 'tomatoes', 'croutons']
salad.append(salad)
sal = copy.copy(salad)
salad.append('salt')
salad.append('pepper')
print(salad[6][6][4], sal[6][-1])
answer: tomatoes pepper