nunca

摘要： 一、题目 Implement atoi to convert a string to an integer. Hint: Carefully consider all possible input cases. If you want a challenge, please do not see b 阅读全文

摘要： 一、题目 The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed 阅读全文

摘要： 一、题目 Given a string s, find the longest palindromic substring in s. You may assume that the maximum length of s is 1000. Example: Example: 参考博客： 阅读全文

摘要： 一、题目 Given two binary trees, write a function to check if they are the same or not. Two binary trees are considered the same if they are structurally 阅读全文

摘要： 一、题目 Given two sorted integer arrays nums1 and nums2, merge nums2 into nums1 as one sorted array. Note:You may assume that nums1 has enough space (siz 阅读全文

摘要： 一、题目 Given a sorted linked list, delete all duplicates such that each element appear only once. For example,Given 1->1->2, return 1->2.Given 1->1->2-> 阅读全文

摘要： 一、题目 You are climbing a stair case. It takes n steps to reach to the top. Each time you can either climb 1 or 2 steps. In how many distinct ways can y 阅读全文

摘要： 一、题目 Implement int sqrt(int x). Compute and return the square root of x. x is guaranteed to be a non-negative integer. 返回一个非负整数的平方根 二、题目解析 这个可以用二分查找来做 阅读全文

摘要： 一、题目 Given two binary strings, return their sum (also a binary string). For example,a = "11"b = "1"Return "100". 二进制加法 二、解题思路 第一种：先将二进制转换成十进制，做十进制加法，然 阅读全文

摘要： 一、题目 Given a non-negative integer represented as a non-empty array of digits, plus one to the integer. You may assume the integer do not contain any l 阅读全文