APPLE的专栏

Single Number II AC Rate: 323/1255My SubmissionsGiven 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: 770/5289My SubmissionsDivide 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: 1023/3385My SubmissionsGiven 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: 878/3476My SubmissionsGiven a singly linked list where elements are sorted in ascending order, convert it to a height balanced BST.

Unique Binary Search Trees AC Rate: 1802/5241My SubmissionsGiven 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: 2538/6177My SubmissionsReverse digits of an integer.Example1: x = 123, return 321Example2: x = -123, return -321click 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; }