GoLang: Check If N and Its Double Exist (Hash Map)
Given an array arr of integers, check if there exists two integers N and M such that N is the double of M ( i.e. N = 2 * …
Python Tool of Base58 Decode Check
June 8, 2021
blockchain, Cryptocurrency, Cryptocurrency, cryptography, python, Tron, Tron Blockchain
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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 – Rotate a 2D Matrix/Image 90 Degree Clockwise
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 …
Algorithm to Minimize Product Sum of Two Arrays
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, …
Backtracking Algorithm to Solve N Queens Puzzle (Partially Filled)
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 …
GoLang: Binary Search Algorithm
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 …