Algorithm and DataStructure

Maximum Sum of an Hourglass

You are given an m x n integer matrix grid.

Minimize XOR

Given two positive integers num1 and num2, find the integer x such that:

• x has the same number of set bits as…

Longest Increasing Subsequence II

You are given an integer array nums and an integer k.

Largest Palindromic Number

You are given a string num consisting of digits only.

Return the largest palindromic integer (in the form of a string) that can be formed using digits taken from num. It should not contain leading zeroes.

Amount of Time for Binary Tree to Be Infected

You are given the root of a binary tree with unique values, and an integer…

Bottom view of a binary tree

This problem appeared on Daily Codings. But I took the problem statement from Geekforgeeks.

Given a Binary Tree, we need to print the bottom view from left to right. A node x is there in output if x is the bottommost node at its horizontal distance. The…

Dutch nation flag problem

Dutch national flag problem appeared in leetcode as well. Here it:

Minimum Score After Removals on a Tree

Problem Statement:

Maximum Score Of Spliced Array

You are given two 0-indexed integer arrays nums1 and nums2, both of length n.