Sum of Two Numbers - Amazon Top Interview Questions
Problem Statement :
Given a list of numbers nums and a number k, return whether any two elements from the list add up to k. You may not use the same element twice. Note: Numbers can be negative or 0. Constraints n ≤ 100,000 where n is the length of nums Example 1 Input nums = [35, 8, 18, 3, 22] k = 11 Output True Explanation 8 + 3 = 11 Example 2 Input nums = [10, 36, 22, 14] k = 4 Output False Explanation No two numbers in this list add up to 4. Example 3 Input nums = [24, 10, 11, 4] k = 15 Output True Explanation 11 + 4 = 15 Example 4 Input nums = [-22, 22, -11, 11] k = 0 Output True Explanation -11 + 11 = 0 Example 5 Input nums = [15, 0, 3, 2] k = 15 Output True Explanation 15 + 0 = 15
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Reverse a doubly linked list
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View Solution →Tree: Preorder Traversal
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View Solution →Tree: Postorder Traversal
Complete the postorder function in the editor below. It received 1 parameter: a pointer to the root of a binary tree. It must print the values in the tree's postorder traversal as a single line of space-separated values. Input Format Our test code passes the root node of a binary tree to the postorder function. Constraints 1 <= Nodes in the tree <= 500 Output Format Print the
View Solution →Tree: Inorder Traversal
In this challenge, you are required to implement inorder traversal of a tree. Complete the inorder function in your editor below, which has 1 parameter: a pointer to the root of a binary tree. It must print the values in the tree's inorder traversal as a single line of space-separated values. Input Format Our hidden tester code passes the root node of a binary tree to your $inOrder* func
View Solution →Tree: Height of a Binary Tree
The height of a binary tree is the number of edges between the tree's root and its furthest leaf. For example, the following binary tree is of height : image Function Description Complete the getHeight or height function in the editor. It must return the height of a binary tree as an integer. getHeight or height has the following parameter(s): root: a reference to the root of a binary
View Solution →Tree : Top View
Given a pointer to the root of a binary tree, print the top view of the binary tree. The tree as seen from the top the nodes, is called the top view of the tree. For example : 1 \ 2 \ 5 / \ 3 6 \ 4 Top View : 1 -> 2 -> 5 -> 6 Complete the function topView and print the resulting values on a single line separated by space.
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