Kth Smallest Element in a BST Given a binary search tree, write a function kthSmallest to find the kth smallest element in it. Follow up:What if the B ...

Unique Binary Search Trees Given n, how many structurally unique BST’s (binary search trees) that store values 1 … n? Example 112345678910Input: 3Out ...

读者-写者问题 读者优先 写者优先 读写者公平 12345678910111213141516171819202122232425262728293031int readcount=0;semaphore mutex=1, r=1, w=1;READER: P(r); ...

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Daily Temperatures Given a list of daily temperatures T, return a list such that, for each day in the input, tells you how many days you would have to ...

Queue Reconstruction by Height Suppose you have a random list of people standing in a queue. Each person is described by a pair of integers (h, k), wh ...

Counting Bits Given a non negative integer number num. For every numbers i in the range 0 ≤ i ≤ num calculate the number of 1’s in their binary repres ...

Shortest Unsorted Continuous Subarray Given an integer array, you need to find one continuous subarray that if you only sort this subarray in ascendin ...

Palindrome Linked List Given a singly linked list, determine if it is a palindrome. Example 112Input: 1->2Output: false Example 212Input: 1->2- ...

Binary Tree Postorder Traversal Given a binary tree, return the postorder traversal of its nodes’ values. Follow up: Recursive solution is trivial, co ...