Program to find total duration of K most watched shows in Python

PythonServer Side ProgrammingProgramming

Suppose we have a list of list of strings called shows, also have a list of integers called durations, and another value k, here shows[i] and durations[i] represent a show and its duration watched by the ith man, we have to find the total duration watched of the k most watched shows.

So, if the input is like shows = ["The BGT", "Jack jumper", "The BGT", "Jokers Company", "Music magic"] durations = [10, 8, 10, 18, 9] k = 2, then the output will be 38, as the top 2 most watched shows are "Jokers Company" and "The BGT" and total durations is 18 and 10 + 10 = 20.

To solve this, we will follow these steps −

  • if shows is empty or durations is empty or k is 0, then

    • return 0

  • d := an empty dictionary

  • for i in range 0 to size of shows, do

    • d[shows[i]] := d[shows[i]] + durations[i]

  • l := a new list

  • for each i in d, do

    • insert d[i] at the end of l

  • sort the list l in reverse order

  • i := 0

  • answer := 0

  • while i < k, do

    • answer := answer + l[i]

    • i := i + 1

  • return answer

Example

Let us see the following implementation to get better understanding

from collections import defaultdict
def solve(shows, durations, k):
   if not shows or not durations or not k:
      return 0

   d = defaultdict(int)

   for i in range(len(shows)):
      d[shows[i]] += durations[i]

   l = []
   for i in d:
      l.append(d[i])
   l.sort(reverse=True)
   i = 0
   answer = 0
   while i < k:
      answer += l[i]
      i += 1
   return answer

shows = ["The BGT", "Jack jumper", "The BGT", "Jokers Company",
"Music magic"]
durations = [10, 8, 10, 18, 9]
k = 2
print(solve(shows, durations, k))

Input

["The BGT", "Jack jumper", "The BGT", "Jokers Company", "Music magic"], [10, 8, 10, 18, 9], 2

Output

38
raja
Updated on 11-Oct-2021 07:41:27

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