Category: Permutation

Teaching Kids Programming: Videos on Data Structures and Algorithms Introduction to Math Combination Combinations count the ways to choose items when order does not matter. This guide builds intuition …

Teaching Kids Programming: Videos on Data Structures and Algorithms You are given a 0-indexed array of integers nums, and an integer target. Return the length of the longest subsequence …

Teaching Kids Programming: Videos on Data Structures and Algorithms You are given an integer array digits, where each element is a digit. The array may contain duplicates. You need …

Teaching Kids Programming: Videos on Data Structures and Algorithms You are given an integer n. We reorder the digits in any order (including the original order) such that the …

Swap Two Characters in BASH In BASH, we can use “${#string}” to get the length of a string. And in a function, we use “local” keyword to declare local …