Algorithm
Problem Name: Python -
In this HackerRank Functions in PYTHON problem solution,
collections.OrderedDict
An OrderedDict is a dictionary that remembers the order of the keys that were inserted first. If a new entry overwrites an existing entry, the original insertion position is left unchanged.
Example
Code
>>> from collections import OrderedDict
>>>
>>> ordinary_dictionary = {}
>>> ordinary_dictionary['a'] = 1
>>> ordinary_dictionary['b'] = 2
>>> ordinary_dictionary['c'] = 3
>>> ordinary_dictionary['d'] = 4
>>> ordinary_dictionary['e'] = 5
>>>
>>> print ordinary_dictionary
{'a': 1, 'c': 3, 'b': 2, 'e': 5, 'd': 4}
>>>
>>> ordered_dictionary = OrderedDict()
>>> ordered_dictionary['a'] = 1
>>> ordered_dictionary['b'] = 2
>>> ordered_dictionary['c'] = 3
>>> ordered_dictionary['d'] = 4
>>> ordered_dictionary['e'] = 5
>>>
>>> print ordered_dictionary
OrderedDict([('a', 1), ('b', 2), ('c', 3), ('d', 4), ('e', 5)])
Task
You are the manager of a supermarket.
You have a list of N items together with their prices that consumers bought on a particular day.
Your task is to print each item_name and net_price in order of its first occurrence.
item_name = Name of the item.
net_price = Quantity of the item sold multiplied by the price of each item.
Input Format
The first line contains the number of items, N.
The next N lines contains the item's name and price, separated by a space.
Constraints
0 <= N <= 100
Output Format
Print the item_name and net_price in order of its first occurrence.
Sample Input
9
BANANA FRIES 12
POTATO CHIPS 30
APPLE JUICE 10
CANDY 5
APPLE JUICE 10
CANDY 5
CANDY 5
CANDY 5
POTATO CHIPS 30
Sample Output
BANANA FRIES 12
POTATO CHIPS 60
APPLE JUICE 20
CANDY 20
Explanation
BANANA FRIES: Quantity bought: 1, price : 12
Net Price: 12
POTATO CHIPS: Quantity bought: 2, price: 30
Net Price: 60
APPLE JUICE: Quantity bought: 2, price: 10
Net Price: 20
CANDY: Quantity bought: 4, price: 5
Net Price: 20
Code Examples
#1 Code Example with Python Programming
Code -
Python Programming
from collections import OrderedDict
d = OrderedDict()
for _ in range(int(input())):
item, price = input().rsplit(maxsplit=1)
d[item] = d.setdefault(item, 0) + int(price)
print('\n'.join(f'{k} {v}' for k, v in d.items()))