Base58 originates from bitcoin where the inventor Satoshi intentionally removes “iILloO0” which are confusing letters/digits when they appear in printing.. Base58 uses the following character set: 123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz In Blockchain …
Teaching Kids Programming: Videos on Data Structures and Algorithms You are given an n x n 2D matrix representing an image, rotate the image by 90 degrees (clockwise). You …
The product sum of two equal-length arrays a and b is equal to the sum of a * b for all 0 <= i < a.length (0-indexed). For example, …
The n queens puzzle asks to place n queens on an n×n chessboard so that no two queens are attacking each other. Given a partially filled two-dimensional integer matrix …
Given an array of integers nums which is sorted in ascending order, and an integer target, write a function to search target in nums. If target exists, then return …
Teaching Kids Programming: Videos on Data Structures and Algorithms There is a function signFunc(x) that returns: 1 if x is positive. -1 if x is negative. 0 if x …