Longest Substring Without Repeating Characters
Problem Given a string, find the length of the longest substring without repeating characters. Example 1: Input: "abcabcbb" Output: 3 Explanation: The answer is "abc", with »
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] »
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 »
Cyclic Permutation
This is an array/list trick that saves about O(n) in space complexity by taking advantage of a given array with integers representing indices. For »