7 laba

#---------------------------------
#СПИСОК ПОКУПОК
#---------------------------------
def scan():
    return list(input().split())


shopping_list = []

print("Команды: add (добавление), sort (сортировка), show (показать список), stop (выход)")

while True:
    query = scan()
    if query[0] == "add":
        shopping_list.append(query[1])
    if query[0] == "sort":
        shopping_list.sort()
    if query[0] == "show":
        for i in range(len(shopping_list)):
            print(i + 1, shopping_list[i])
    if query[0] == "stop":
        break
#---------------------------------
#КОМПЛЕКСНЫЕ ЧИСЛА
#---------------------------------
def scan_float():
    return list(map(float, input().split()))

def complex_print(a, b):
    return "(" + ("%.3f" % a) + ", " + ("%.3f" % b) + ")"

def complex_abs(a, b):
    return "%.3f" % (a ** 2 + b ** 2)

def complex_sum(a, b, c, d):
    return complex_print(a + c, b + d)

def complex_difference(a, b, c, d):
    return complex_print(a - c, b - d)

def complex_composition(a, b, c, d):
    return complex_print(a * c - b * d, b * c + a * d)

def complex_quotient(a, b, c, d):
    Re = (a * c + b * d) / (c ** 2 + d ** 2)
    Im = (b * c - a * d) / (c ** 2 + d ** 2)
    return complex_print(Re, Im)

print("Введите A: ")
number1 = scan_float()
print("Введите B: ")
number2 = scan_float()
a = number1[0]
b = number1[1]
c = number2[0]
d = number2[1]

print("Комплексные числа:")
print("A = ", complex_print(a, b))
print("B = ", complex_print(c, d))
print("Результаты вычислений:")
print("|A| = ", complex_abs(a, b))
print("|B| = ", complex_abs(c, d))
print("A + B = ", complex_sum(a, b, c, d))
print("A - B = ", complex_difference(a, b, c, d))
print("B - A = ", complex_difference(c, d, a, b))
print("A * B = ", complex_composition(a, b, c, d))
print("A / B = ", complex_quotient(a, b, c, d))
print("B / A = ", complex_quotient(c, d, a, b))
#---------------------------------
#ДАННЫЕ О ТОВАРАХ
#---------------------------------
def scan_int():
    return list(map(int, input().split()))

def show(info):
    print("Номер\tНазвание\tКоличество\tЦена")
    for i in range(len(info)):
        print(i + 1, end = "\t")
        for j in range(len(info[i])):
            print(info[i][j], end = "\t\t")
        print()

def change(info, index, value):
    info[index - 1][1] = value
    return info

info = [["cake", 100, 40], ["banana", 50, 28], ["juice", 30, 35], ["burger", 20, 39]]

show(info)

while True:
    query = scan_int()
    if query[0] != 0:
        info = change(info, query[0], query[1])
    else:
        show(info)
        break
#---------------------------------
#СТУДЕНТЫ
#---------------------------------
def scan():
    return list(input().split())

n = int(input())

student = []
average = 0

for i in range(n):
    query = scan()
    query[2] = int(query[2])
    average += query[2]

    student.append(query)

average /= n

for i in range(n):
    if student[i][2] > average:
        for info in student[i]:
            print(info, end = " ")
        print()
#---------------------------------
#ДАННЫЕ О ТОВАРАХ***********
#---------------------------------
def scan():
    return list(input().split())

def by_name(element):
    return element[0]

def by_count(element):
    return element[1]

def by_price(element):
    return element[2]

def add(info, product):
    info.append(product)
    return info

def show(info, field):
    info.sort(key = field)
    print("Номер\tНазвание\tКоличество\tЦена")
    for i in range(len(info)):
        print(i + 1, end = "\t")
        for j in range(len(info[i])):
            print(info[i][j], end = "\t\t")
        print()

def delete(info, index):
    info.pop(index)
    return info

def get_price(info, index):
    return info[index][1] * info[index][2]

def get_total_price(info):
    total_price = 0
    for i in range(len(info)):
        total_price += get_price(info, i)
    return total_price

def edit(info, index, name, count, price):
    info[index][0] = name
    info[index][1] = count
    info[index][2] = price

info = [["banana", 50, 28], ["burger", 20, 39], ["cake", 100, 40], ["juice", 30, 35]]
field = by_name

while True:
    query = scan()
    command = query[0]
    if command == "show":
        show(info, field)
    if command == "add":
        query[2] = int(query[2])
        query[3] = int(query[3])
        info = add(info, query[1 : ])
    if command == "edit":
        index = int(query[1]) - 1
        edit(info, index, query[2], int(query[3]), int(query[4]))
    if command == "delete":
        delete(info, int(query[1]) - 1)
    if command == "price":
        print(get_price(info, int(query[1]) - 1))
    if command == "total":
        print(get_total_price(info))
    if command == "sort":
        field = query[2]
        if field == "name":
            field = by_name
        if field == "count":
            field = by_count
        if field == "price":
            field = by_price
        show(info, field)
    if command == "0":
        break