# Python: heap queue algorithm - Exercises, Practice, Solution

## Python heap queue algorithm [19 exercises with solution ]

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Heaps are binary trees for which every parent node has a value less than or equal to any of its children.

Here are some exercises of heap queue algorithm.

**1.** Write a Python program to find the three largest integers from a given list of numbers using Heap queue algorithm. Go to the editor

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**2.** Write a Python program to find the three smallest integers from a given list of numbers using Heap queue algorithm. Go to the editor

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**3.** Write a Python program to implement a heapsort by pushing all values onto a heap and then popping off the smallest values one at a time. Go to the editor

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**4.** Write a Python function which accepts an arbitrary list and converts it to a heap using Heap queue algorithm. Go to the editor

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**5.** Write a Python program to delete the smallest element from the given Heap and then inserts a new item. Go to the editor

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**6.** Write a Python program to sort a given list of elements in ascending order using Heap queue algorithm. Go to the editor

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**7.** Write a Python program to find the kth (1 <= k <= array's length) largest element in an unsorted array using Heap queue algorithm. Go to the editor

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**8.** Write a Python program to compute maximum product of three numbers of a given array of integers using Heap queue algorithm. Go to the editor

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**9.** Write a Python program to find the top k integers that occur the most frequently from a given lists of sorted and distinct integers using Heap queue algorithm. Go to the editor

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**10.** Write a Python program to get the n expensive and cheap price items from a given dataset using Heap queue algorithm. Go to the editor

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**11.** Write a Python program to merge multiple sorted inputs into a single sorted iterator (over the sorted values) using Heap queue algorithm. Go to the editor

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**12.** Given a n x n matrix where each of the rows and columns are sorted in ascending order, write a Python program to find the kth smallest element in the matrix. Go to the editor

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**13.** Write a Python program to find the nth super ugly number from a given prime list of size k using Heap queue algorithm. Go to the editor

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**14.** Write a Python program to get the k most frequent elements from a given non-empty list of words using Heap queue algorithm. Go to the editor

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**15.** Write a Python program to check if the letters of a given string can be rearranged so that two characters that are adjacent to each other are different using Heap queue algorithm. Go to the editor

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**16.** Write a Python program which add integer numbers from the data stream to a heapq and compute the median of all elements. Use Heap queue algorithm. Go to the editor

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**17.** You are given two integer arrays sorted in ascending order and an integer k. Write a Python program to find k number of pairs (u, v) which consists of one element from the first array and one element from the second array using Heap queue algorithm. Go to the editor

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**18.** Write a Python program to find the nth ugly number using Heap queue algorithm. Go to the editor

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**19.** Write a Python program to print a heap as a tree-like data structure. Go to the editor

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**More to Come !**

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## Python: Tips of the Day

**Python: While-else construct**

i = 5 while i > 1: print("Whil-ing away!") i -= 1 if i == 3: break else: print("Finished up!")

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