不断成长的小白

题意：对链表进行排序 思路：将链表用一个ArrayList保存，再sort()排序，构造一个新链表  public ListNode sortList(ListNode head) { if(head==null)return head; ArrayListtemp=new ArrayList while(head!=null){ temp.add(head.val); head=h

大整数乘法 思路：讲各位相乘的数保存在数组里，再将各个余数用一个StringBulider的insert方法逐个插入（insert方法将指定数符插入指定位置） public class MultiplyStrings { public String multiply(String num1, String num2) { num1=new StringBuffer(num1).re

题目： Maximum Subarray Find the contiguous subarray within an array (containing at least one number) which has the largest sum. For example, given the array [-2,1,-3,4,-1,2,1,-5,4], the contiguou

题目： We are playing the Guess Game. The game is as follows: I pick a number from 1 to n. You have to guess which number I picked. Every time you guess wrong, I'll tell you whether the number i

题目： Given an array nums, write a function to move all 0's to the end of it while maintaining the relative order of the non-zero elements. For example, given nums = [0, 1, 0, 3, 12], after call