博客
关于我
80. Remove Duplicates from Sorted Array II
阅读量:424 次
发布时间:2019-03-06

本文共 1592 字,大约阅读时间需要 5 分钟。

Given a sorted array nums, remove the duplicates  such that duplicates appeared at most twice and return the new length.

Do not allocate extra space for another array, you must do this by modifying the input array  with O(1) extra memory.

Example 1:

Given nums = [1,1,1,2,2,3],Your function should return length = 5, with the first five elements of nums being 1, 1, 2, 2 and 3 respectively.It doesn't matter what you leave beyond the returned length.

Example 2:

Given nums = [0,0,1,1,1,1,2,3,3],Your function should return length = 7, with the first seven elements of nums being modified to 0, 0, 1, 1, 2, 3 and 3 respectively.It doesn't matter what values are set beyond the returned length.

Clarification:

Confused why the returned value is an integer but your answer is an array?

Note that the input array is passed in by reference, which means modification to the input array will be known to the caller as well.

Internally you can think of this:

// nums is passed in by reference. (i.e., without making a copy)int len = removeDuplicates(nums);// any modification to nums in your function would be known by the caller.// using the length returned by your function, it prints the first len elements.for (int i = 0; i < len; i++) {    print(nums[i]);}
 

AC code:

class Solution {public:    int removeDuplicates(vector
& nums) { int i = 0; for (auto n : nums) { if (i < 2 || n > nums[i-2]) nums[i++] = n; } return i; }};
Runtime: 
8 ms, faster than 100.00% of C++ online submissions for Remove Duplicates from Sorted Array II.

 

 

转载地址:http://uzxuz.baihongyu.com/

你可能感兴趣的文章
Mysql group by
查看>>
MySQL I 有福啦,窗口函数大大提高了取数的效率!
查看>>
mysql id自动增长 初始值 Mysql重置auto_increment初始值
查看>>
MySQL in 太多过慢的 3 种解决方案
查看>>
Mysql Innodb 锁机制
查看>>
MySQL InnoDB中意向锁的作用及原理探
查看>>
MySQL InnoDB事务隔离级别与锁机制深入解析
查看>>
Mysql InnoDB存储引擎 —— 数据页
查看>>
Mysql InnoDB存储引擎中的checkpoint技术
查看>>
Mysql InnoDB存储引擎中缓冲池Buffer Pool、Redo Log、Bin Log、Undo Log、Channge Buffer
查看>>
MySQL InnoDB引擎的锁机制详解
查看>>
Mysql INNODB引擎行锁的3种算法 Record Lock Next-Key Lock Grap Lock
查看>>
mysql InnoDB数据存储引擎 的B+树索引原理
查看>>
mysql interval显示条件值_MySQL INTERVAL关键字可以使用哪些不同的单位值?
查看>>
mysql problems
查看>>
MySQL replace函数替换字符串语句的用法(mysql字符串替换)
查看>>
mysql workbench6.3.5_MySQL Workbench
查看>>
MySQL Workbench安装教程以及菜单汉化
查看>>
MySQL Xtrabackup 安装、备份、恢复
查看>>
mysql [Err] 1436 - Thread stack overrun: 129464 bytes used of a 286720 byte stack, and 160000 bytes
查看>>