Buy and Sell Two Stocks
Problem Given an array of integers representing stock prices, with each index representing a different day, find the maximum profit by selling at most two stocks. »
Rotate a 2D Matrix
var jsav = new JSAV("set"); jsav.label("Before rotation").css({"color": "gray"}); var m = jsav.ds.matrix([[0, 1, 2], [3, 4, 5], [6, 7, 8] »
Symmetry in a Tree
var jsav = new JSAV("av-sym"); jsav.label("Symmetric tree"); var bt = jsav.ds.binarytree(); bt.root("5"); // set the value of the root bt.root().left( »
Primes
Let's discuss primes! A natural number is considered a prime if it is: Greater than 1 Its divisors are only 1 and itself Examples: \(5\) has »
Phone Number Mnemonics in Python
Recursion is a great way to come up with permutations of strings or elements. Not necessarily because of the performance (iterative styles are usually faster) but »