print('Welcome to our pizza store!')
bill=0
size=input("enter the size of the pizza you want[s/m/l]: \n")
if size=='s' or size=='S':
    bill +=100
    print("the small pizza costs you 100 rupees")
elif size=='m' or 'M':
    bill +=200
    print("the medium pizza costs you 200 rupees")
else:
    bill +=300
    print("the large pizza costs you 300 rupees")

papp=input("would you like to add papparoni[y/n]: \n")
if(papp=='y'or papp=='Y'):
    if size=='s' or size=='S':
        bill +=30
    else:
        bill +=50

cheese=input("would you like to add extra cheese[y/n]: \n")
if(cheese=='y'or cheese=='Y'):
    bill +=20

print("the total price:",bill)