摘要：Related to questionExcel Sheet Column TitleGiven a column title as appear in an Excel sheet, return its corresponding column number.For example: A ... 阅读全文

摘要：Given an integern, return the number of trailing zeroes inn!.Note:Your solution should be in logarithmic time complexity.cracking interview原题，2*5可以构成一... 阅读全文

摘要：Implement an iterator over a binary search tree (BST). Your iterator will be initialized with the root node of a BST.Callingnext()will return the next... 阅读全文

摘要：The demons had captured the princess (P) and imprisoned her in the bottom-right corner of a dungeon. The dungeon consists of M x N rooms laid out in a... 阅读全文

摘要：Given a list of non negative integers, arrange them such that they form the largest number.For example, given[3, 30, 34, 5, 9], the largest formed num... 阅读全文

摘要：All DNA is composed of a series of nucleotides abbreviated as A, C, G, and T, for example: "ACGAATTCCG". When studying DNA, it is sometimes useful to ... 阅读全文

摘要：Rotate an array ofnelements to the right byksteps.For example, withn= 7 andk= 3, the array[1,2,3,4,5,6,7]is rotated to[5,6,7,1,2,3,4].Note:Try to come... 阅读全文

摘要：Reverse bits of a given 32 bits unsigned integer.For example, given input 43261596 (represented in binary as00000010100101000001111010011100), return ... 阅读全文

摘要：Write a function that takes an unsigned integer and returns the number of ’1' bits it has (also known as theHamming weight).For example, the 32-bit in... 阅读全文

摘要：You are a professional robber planning to rob houses along a street. Each house has a certain amount of money stashed, the only constraint stopping yo... 阅读全文

摘要：Given a binary tree, imagine yourself standing on therightside of it, return the values of the nodes you can see ordered from top to bottom.For exampl... 阅读全文

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 nu... 阅读全文