Collections.OrderedDict() Hacker Rank Solution – Queslers

Problem: Collections.OrderedDict() Hacker Rank 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:
APPLE JUICE: Quantity bought: 2, Price: 10
Net Price: 20
CANDY: Quantity bought: 4, Price: 5
Net Price:20

Collections.OrderedDict() Hacker Rank Solution in python 2

from collections import OrderedDict
nTrans = int(raw_input())
inventories = OrderedDict()
for n in range(nTrans):
    tmp = raw_input().split()
    item = ' '.join(tmp[0:len(tmp)-1])
    price = int(tmp[-1])
    if item in inventories:
        inventories[item] += price
    else:
        inventories[item] = price
items = list(inventories.items())
items.sort()
for item in items:
    print item[0], item[1]

Collections.OrderedDict() Hacker Rank Solution in python 3

# Enter your code here. Read input from STDIN. Print output to STDOUT
from collections import OrderedDict
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)

Collections.OrderedDict() Hacker Rank Solution in pypy

# Enter your code here. Read input from STDIN. Print output to STDOUT
from collections import OrderedDict
items = int(raw_input())
items_price = OrderedDict()
for _ in range(items):
    desc = raw_input().split()
    if not items_price.get(" ".join(desc[0:-1]),None):
        items_price[" ".join(desc[0:-1])] =0
    items_price[" ".join(desc[0:-1])] += int(desc[-1])

for i,j in items_price.items():
    print i,j

Collections.OrderedDict() Hacker Rank Solution in pypy 3

from collections import OrderedDict

d = OrderedDict()
for _ in range(int(input())):
    info = input().split(' ')
    price = int(info[-1])
    info.pop()
    item = ' '.join(info)
    price = int(price)
    if not item in d:
        d[item] = price
    else:
        d[item] += price

for pair in d:
    print(pair + ' ' + str(d[pair]))

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