江湖神棍的工作岁月

Follow up for "Remove Duplicates":What if duplicates are allowed at mosttwice?For example,Given sorted arraynums=[1,1,1,2,2,3],Your function should re... Read More

You are given annxn2D matrix representing an image.Rotate the image by 90 degrees (clockwise).Follow up:Could you do this in-place?使用先对角线翻转，后水平翻转1 2 ... Read More

Write an efficient algorithm that searches for a value in anmxnmatrix. This matrix has the following properties:Integers in each row are sorted from l... Read More

Write a program to check whether a given number is an ugly number.Ugly numbers are positive numbers whose prime factors only include2, 3, 5. For examp... Read More

Given a binary tree, return all root-to-leaf paths.For example, given the following binary tree: 1 / \2 3 \ 5All root-to-leaf paths are:["1->... Read More

Implementatoito convert a string to an integer.Hint:Carefully consider all possible input cases. If you want a challenge, please do not see below and ... Read More

Given amxnmatrix, if an element is 0, set its entire row and column to 0. Do it in place.1)O(m+n)算法：用两个数组，长度分别为m，n，如果有一个matrix[i][j] == 0，那么将数组col[j] ... Read More

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... Read More

Given two sorted integer arraysnums1andnums2, mergenums2intonums1as one sorted array.Note:You may assume thatnums1has enough space (size that is great... Read More

Given an array of integers and an integerk, find out whether there there are two distinct indicesiandjin the array such thatnums[i] = nums[j]and the d... Read More