Leetcode数组类题目总结(Java版本-20193)
44页1、Leetcode151题目详解1 第一章线性表此类题目考察线性表的操作,例如数组,单链表,双向链表1.1 Remove Duplicates from Sorted Array描述Given a sorted array, remove the duplicates in place such that each element appear only once and return the new length.Do not allocate extra space for another array, you must do this in place with constant memory.For example, Given input array A = 1,1,2,Your function should return length = 2, and A is now 1,2.分析无代码:public class Solution public int removeDuplicates(int A) if(A=null|A.length=0) return 0; int
2、index=0; for(int i=1;iA.length;i+) if(Aindex!=Ai) A+index=Ai; return index+1;/爱辅助网:www.aifuzhu.top 相关题:Remove Duplicates from Sorted Array II 见1.21.2 Remove Duplicates from Sorted Array II 描述Follow up for ”Remove Duplicates”: What if duplicates are allowed at most twice?For example, Given sorted array A = 1,1,1,2,2,3,Your function should return length = 5, and A is now 1,1,2,2,3分析可以加一个变量来记录重复元素的个数能很好的解决问题。由于此题已经是排序的了,如果是没有排序的,可以使用hashmap来求元素的个数。代码public class Solution public int removeDuplicates
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