Description
He wants you to go buy him some groceries.
As an I2P student, you have to make a shopping list to buy the foods for Varaha.
Write a program to manage a shopping list. Each item in the list has a name and a quantity.
The program should support the following commands:
-
add→ Add an entry with a quantity. If the entry already exists, increase its quantity. -
remove→ Remove a quantity of an entry. If the quantity becomes 0 or negative, remove the entry completely. -
show→ Display the current shopping list -
count→ Print the total sum of all quantities in the list. -
clear→ Remove all entries from the shopping list.
items = {}
# Functions
def add():
pass
def remove():
pass
def show():
pass
def count():
pass
def clear():
pass
# Command mapping using lambdas
actions = {
# todo
}
# Main program
n = int(input())
for _ in range(n):
cmd = input().strip()
# todo
Input
-
The first line contains an integer
n,number of commands. -
The next
nlines contain the commands
For add and remove, the next line contains the entry name and quantity separated by a space.
For show, count, and clear, no additional input is required.
Output
-
show, print the shopping list. -
count, print the total sum of quantities. -
No output is required for
add,remove, orclear.