Binary search
Return the index of target in a sorted list, or -1 if not present.
Count pairs with given difference
Count how many unordered pairs in a list have a given absolute difference using an efficient approach.
Pascal Triangle Row
Given a non-negative integer n, return the nth row of Pascal's triangle as a list of integers.
Bubble Sort
Implement bubble sort that sorts a list of numbers in ascending order.
Selection Sort Implementation
Implement selection sort to sort a list of numbers in ascending order.
Exponential Search
Implement exponential search to find any valid index of a target in a sorted list.
Find Peak Index
Given a list of integers, return the index of any peak element where the value is not smaller than its neighbors.
Peak Element in Array
Implement a function that returns the index of any peak element in a list of integers.
Merge Two Sorted Lists
Write a function that merges two sorted lists into a single sorted list.
Jump Search
Implement the jump search algorithm to locate a target in a sorted list, returning its index or -1.
Delete Old Records
Filter a list of records by removing those with a date older than a given cutoff date.
Consecutive available seats
Given a list of seat statuses, return the length of the longest consecutive run of available (0) seats.
Argsort Indices
Implement a function that returns the indices that would sort a list of integers, with ties broken by original order.
Memory view slice
Implement chunk_list that splits a list into consecutive sublists of a given chunk size.
Showing 1–14 of 14 challenges · easy · Data Structures & Algorithms
Data Structures & Algorithms — Python coding challenges
What you will find here
This page lists data structures & algorithms challenges — real Python problems you solve in the browser IDE with instant test feedback. Each challenge includes a clear brief, starter code, and automated checks.
Challenges vs tutorials and quizzes
Challenges test what you can build under constraints. For guided teaching, use our Python tutorials. For quick checks, try quizzes or copy snippets from code samples.