#
# Sets 
#
# Practice 
#

Preliminary notes: 
- Based on Chapter 8 
- Aim: more than technique 
- Use only studied material. 


# Q. 1
# A list of pairs is given, Each pair includes
# a string and three-digit positive integer.
# Write a program that prints all integers 
# in which all digits are different. 

lst = [['a', 545], ['b', 789], ['c', 123]] 
for s, num in lst: 
    if len(set(str(num))) == 3: 
        print(num)


# Q. 2
# Yasmin decided to open a restaurant. 
# She wishes to serve all dishes served 
# in the three exisiting restaurants in town. 
# Write a program that given menu lists 
# of the other three restaurant, produces 
# the menu of Yasmin-s restaurant, stored 
# in a list. The menu does not include duplicates. 

menus = [["soup", "pasta", "cake"], 
     	 ["salad", "pasta", "cake"],
	     ["soup", "pasta", "ice cream"] ]
newMenu = set() 
for menu in menus: 
    newMenu = newMenu | set(menu)
print(list(newMenu))

menu1 = ["soup", "pasta", "cake"]
menu2 = ["salad", "pasta", "cake"]
menu = set(menu1) | set(menu2)
menu3 = ["soup", "pasta", "ice cream"] 
menu = list(menu | set(menu3))
print(menu)


Q. 3
Dan wants to know how many dishes served 
in his restaurant are not served in the 
three other restaurants in town. 
Write a program that prints this number. 

Dan = ["soup", "pasta", "cake", "pizza"] 

menus = [["soup", "pasta", "cake"], 
    	 ["salad", "pasta", "cake"],
	     ["soup", "pasta", "ice cream"] ]

Dan = ["soup", "pasta", "cake", "pizza"] 
DanExclusive = set(Dan)
for menu in menus: 
    DanExclusive = DanExclusive - set(menu)    
print(len(DanExclusive))


Dan = ["soup", "pasta", "cake", "pizza"] 
menu1 = ["soup", "pasta", "cake"]
DanExclusive = set(Dan) - set(menu1)
menu2 = ["salad", "pasta", "cake"]
DanExclusive = DanExclusive - set(menu2)
print(DanExclusive)



Q. 4
Adam prepared his restaurant-s menu 
as follows: he went to other restaurants in 
town, one after another, and added to his 
menu all dishes of each restaurant. He stopped 
collecting dishes when his menu included 
4 dishes. Write a program that given 
all other menus prepares Dan-s. 


# with for 
menus = [["soup", "pasta", "cake"], 
     	 ["salad", "pasta", "cake"],
	     ["soup", "pasta", "ice cream"] ]
newMenu = set() 
for menu in menus: 
    newMenu = newMenu | set(menu)
    if (len(newMenu) == 4): 
        break 
print(list(newMenu))


# with while 
menus = [["soup", "pasta", "cake"], 
     	 ["salad", "pasta", "cake"],
	     ["soup", "pasta", "ice cream"] ]
newMenu = set() 
ind = 0 
while len(newMenu) < 10 and ind < len(menus): 
    newMenu = newMenu | set(menus[ind])
    ind = ind + 1
print(list(newMenu))




# Q. 5
# You are provided with a list of lists. 
# Each inner list holds number of stars 
# given to three restaurants 
# in three different reviews. 
# Write a program that prints
# True if at least one restaurant received 
# a number of starts not given to 
# the other restaurants, False otherwise. 

stars = [[5, 4, 3], [3, 4, 5], [4, 3, 5]]
stars0 = set(stars[0]) 
result = False 
for currentStars in stars: 
    if len(stars0 & set(currentStars)) != 3: 
        result = True 
        break 
print(result)
    

# Q. 6
# Yasmin, Yona and Rona each may eat
# a certain number of ice cream scoops 
# in one week. There are four types of 
# ice cream. Write a program that accepts pairs: 
# a child name and the type of ice cream s/he likes, 
# one after another, until there are no longer 
# scoops of any kind. If a child asks for a type 
# of ice crean which is no longer in stock 
# the program issues a proper message. 
# The program prints 
# the name of childs that ate ice cream. 

scoops = [1, 0, 0, 2]
childs = set() 
while sum(scoops) != 0:  
    name = input("Please enter your name: ")
    kind = int(input("Please enter ice cream kind 1-4: "))
    if scoops[kind - 1] > 0: 
        scoops[kind - 1] = scoops[kind - 1] - 1 
        childs.add(name)
    else: 
        print("Sorry, maybe next time...")
print(childs)