The Permutation Iterator in Python
The permutation is a frequently-used algorithm that we can apply to strings, list, or arrays (vector). In Python, we can import the itertools and use the permutations method which …
Category: python
Compute the Indices of the Target Element in Array/List using Python or Javascript
Given an array (or list), and a target element, find all the indices that the element appears in it. For example, Array: , and find the element 5, which …
Design A Leaderboard using Priority Queue, Hash Map (unordered_map), or Hash Set (multi_set)
December 11, 2019
algorithms, c / c++, data structure, design questions, programming languages, python
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Design a Leaderboard class, which has 3 functions: addScore(playerId, score): Update the leaderboard by adding score to the given player’s score. If there is no player with such id …
Subtract the Product and Sum of Digits of an Integer
Given an integer number n, return the difference between the product of its digits and the sum of its digits. Example 1: Input: n = 234 Output: 15 Explanation: …
Three ways to Reverse a List/Array/Tuple in Python
Reversing a List/Array is very commonly needed and there are three ways to reverse a list or array in Python. Using the .reverse() method to reverse a list or …