Collections.OrderedDict() in python | HackerRank Solution
Problem
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 contain the item's name and price, separated by a space.
Output Format
Print the item_name and net_price in order of their 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
Program
1 2 3 4 5 6 7 8 9 | # import OrderedDict from collections from collections import* d = OrderedDict() for _ in range(int(input())): item, space, quantity = input().rpartition(' ') d[item] = d.get(item, 0) + int(quantity) for item, quantity in d.items(): print(item, quantity) |
