APPLE的专栏

Single Number II   AC Rate: 323/1255 My Submissions Given an array of integers, every element appears three times except for one. Find that single one. Note: Your algorithm should have

Divide Two Integers   AC Rate: 770/5289 My Submissions Divide two integers without using multiplication, division and mod operator. 提交了几次，看似简单的一道题，第一下提交发现忘考虑负数的情况……以后做题一定要想清楚。第二次提

Remove Nth Node From End of List   AC Rate: 1023/3385 My Submissions Given a linked list, remove the nth node from the end of list and return its head. For example, Given linked lis

Convert Sorted List to Binary Search Tree   AC Rate: 878/3476 My Submissions Given a singly linked list where elements are sorted in ascending order, convert it to a height balanced BST.

Unique Binary Search Trees   AC Rate: 1802/5241 My Submissions Given n, how many structurally unique BST's (binary search trees) that store values 1...n? For example, Given n = 3, ther

Reverse Integer   AC Rate: 2538/6177 My Submissions Reverse digits of an integer. Example1: x = 123, return 321 Example2: x = -123, return -321 click to show spoilers. Have you thoug

Merge k sorted linked lists and return it as one sorted list. Analyze and describe its complexity. /** * Definition for singly-linked list. * public class ListNode { * int val;

public class Solution { public double pow(double x, int n) { if(x == 0 || x == 1.0 || n == 1){ return x; }else if(n == 0){ return 1; }