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摘要： Given an array of integers, find two numbers such that they add up to a specific target number. The function twoSum should return indices of the two n 阅读全文

摘要： Given an integer array, find a subarray where the sum of numbers is in a given interval. Your code should return the number of possible answers. (The 阅读全文

摘要： Design and implement a TwoSum class. It should support the following operations: add and find. add - Add the number to an internal data structure.find 阅读全文

摘要： An abbreviation of a word follows the form . Below are some examples of word abbreviations: a) it --> it (no abbreviation) 1 b) d|o|g --> d1g 1 1 1 1 阅读全文

摘要： Given an interval list which are flying and landing time of the flight. How many airplanes are on the sky at most? If landing and flying happens at th 阅读全文

摘要： Given a non-overlapping interval list which is sorted by start point. Insert a new interval into it, make sure the list is still in order and non-over 阅读全文

摘要： The API: int read4(char *buf) reads 4 characters at a time from a file. The return value is the actual number of characters read. For example, it retu 阅读全文

摘要： Given a binary search tree and a new tree node, insert the node into the tree. You should keep the tree still be a valid binary search tree. You can a 阅读全文

摘要： Given a binary tree, determine if it is a valid binary search tree (BST). Assume a BST is defined as follows: The left subtree of a node contains only 阅读全文

摘要： Given a collection of intervals, merge all overlapping intervals. Given a collection of intervals, merge all overlapping intervals. Given a collection 阅读全文