[Solved] On a 2D plane, there are n points with integer coordinates points[i] = [xi, yi]. Return the minimum time in seconds to visit all the points in the order given by points.
[Solved] Given a 2D grid of size m x n and an integer k. You need to shift the grid k times.
[Solved] There is an m x n matrix that is initialized to all 0’s. There is also a 2D array indices where each indices[i] = [ri, ci] represents a 0-indexed location to perform some increment operations on the matrix.
[Solved] Given a callable function f(x, y) with a hidden formula and a value z, reverse engineer the formula and return all positive integer pairs x and y where f(x,y) == z. You may return the pairs in any order.
[Solved] Balanced strings are those that have an equal quantity of ‘L’ and ‘R’ characters. Given a balanced string s, split it into some number of substrings such that: Each substring is balanced.
[Solved] Given an array of integers arr, return true if the number of occurrences of each value in the array is unique, or false otherwise.
[Solved] Given a string text, you want to use the characters of text to form as many instances of the word “balloon” as possible. You can use each character in text at most once. Return the maximum number of instances that can be formed.
[Solved] Given the root of a binary tree, the level of its root is 1, the level of its children is 2, and so on. Return the smallest level x such that the sum of all the values of nodes at level x is maximal.
[Solved] You are given an array of strings words and a string chars. A string is good if it can be formed by characters from chars (each character can only be used once). Return the sum of lengths of all good strings in words.