The Unique Permutations Algorithm with Duplicate Elements
Given a collection of numbers that might contain duplicates, return all possible unique permutations. Example: Input: Output: , , ] How to Get Unique Permuations in C++? In fact, …
Python Coding Reference: index() and find() for string (substring), tuple and list
How to Find the Index of Given Element in String/Tuple/List in Python? The index() in Python gives the lowest index that element matches the target. The index starts at …
Walking Robot Simulation Algorithm with Obstacles Detection
A robot on an infinite grid starts at point (0, 0) and faces north. The robot can receive one of three possible types of commands: -2: turn left 90 …
The Selection Sorting Algorithm in VBScript
The selection sort, similar to insertion sort, is one of the simple sorting algorithm that has O(N^2) time complexity. The selection sorting algorithm is quadratic, thus not efficient when …
Find the Queens That Can Attack the King
On an 8×8 chessboard, there can be multiple Black Queens and one White King. Given an array of integer coordinates queens that represents the positions of the Black Queens, …
C++ Coding Reference: is_sorted_until() and is_sorted()
We talked about sorting (unstable and stable) algorithms implemented in C++ STL. The STL algorithm header also provides the is_sorted_until() and is_sorted() which returns the first out-of-order element in …