Difficulty: Easy

Binary Tree Level Order Traversal

Given the root of a binary tree, return the level order traversal of its nodes' values.

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Sum of Two Integers without Arithmetic Operators

Add two integers without using Arithmetic Operators.

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Find One Missing Number in a Range

Given an array containing n distinct integers in the range [0, n], one number is missing from the array. Find the missing number.

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Check if Duplicate Element Exists in an Array

Given an array of integers, check if the array contains any duplicates.

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Find all the Pairs with Given Sum

Given a list of integers, find all pairs with given sum.

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Check if a Binary Tree is Balanced or Not

Given root of a binary tree, check if it is balanced or not.

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Count Number of Substrings with Only 1s

Given a binary string, count no of substrings with only 1's.

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Number of Differing Bits

Given two integers count the number of positions where there bit representation differ.

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