Leetcode - Reverse Words
比起POJ弱爆了一题,从后往前扫描一遍,O(n)时间,仅仅要注意各种极端情况就可以,不明确通过率为什么仅仅有13%。
#include<iostream>
#include<string>
using namespace std; class Solution {
public:
void reverseWords(string &s) { char* cstr = new char[s.size()+1]; int cc = 0;
int revstrC = s.size() - 1; while (revstrC >= 0)
{
while (revstrC>=0 && s.at(revstrC) == ' ')
{
revstrC--;
} if (revstrC >= 0)//find the end of a word
{
int end = revstrC; while (revstrC >= 0 && s.at(revstrC) != ' ')
revstrC--; s.copy(cstr+cc, end-revstrC, revstrC+1); cc = cc + end - revstrC; cstr[cc] = ' '; cc++;
}
}
cstr[cc-1] = '\0'; s.assign(cstr);
}
}; int main()
{
Solution sol;
string str = " Hello fwe asg wf vergv ";
sol.reverseWords(str); cout << str << endl;
}
Leetcode - Reverse Words的更多相关文章
- LeetCode: Reverse Words in a String:Evaluate Reverse Polish Notation
LeetCode: Reverse Words in a String:Evaluate Reverse Polish Notation Evaluate the value of an arithm ...
- 2016.5.16——leetcode:Reverse Bits(超详细讲解)
leetcode:Reverse Bits 本题目收获 移位(<< >>), 或(|),与(&)计算的妙用 题目: Reverse bits of a given 3 ...
- LeetCode——Reverse String
LeetCode--Reverse String Question Write a function that takes a string as input and returns the stri ...
- [LeetCode] Reverse Vowels of a String 翻转字符串中的元音字母
Write a function that takes a string as input and reverse only the vowels of a string. Example 1:Giv ...
- [LeetCode] Reverse String 翻转字符串
Write a function that takes a string as input and returns the string reversed. Example: Given s = &q ...
- [LeetCode] Reverse Linked List 倒置链表
Reverse a singly linked list. click to show more hints. Hint: A linked list can be reversed either i ...
- [LeetCode] Reverse Bits 翻转位
Reverse bits of a given 32 bits unsigned integer. For example, given input 43261596 (represented in ...
- [LeetCode] Reverse Words in a String II 翻转字符串中的单词之二
Given an input string, reverse the string word by word. A word is defined as a sequence of non-space ...
- [LeetCode] Reverse Words in a String 翻转字符串中的单词
Given an input string, reverse the string word by word. For example, Given s = "the sky is blue ...
- [LeetCode] Reverse Linked List II 倒置链表之二
Reverse a linked list from position m to n. Do it in-place and in one-pass. For example:Given 1-> ...
随机推荐
- SGU 111.Very simple problem
题目大意: 求平方不大于n(n<=10^1000)的最大的数. 分析: 二分+高精度乘法 或者 高精度开方... ...
- Jquery实现图片左右滚动(自动)
<!DOCTYPE HTML><html><head><title>基于jQuery的控制左右滚动效果_自动滚动版本</title>< ...
- Linux技巧总结(个人经验版)
1:善用桌面:1.图形界面的编辑,2.终端只要开机就在第2桌面,3.浏览器在第3桌面,4.娱乐在第4桌面. 2:cd命令中,输入中文目录很不方便,用 ln -s 桌面 desktop 创建软链接,不必 ...
- 小心DriveInfo类IsReady属性的较大延迟问题
当某些驱动器调用IsReady属性来判断是否准备好时,会有性能问题,会非常慢,特别是网络驱动器断开的时候,这个属性会有30秒左右的延迟,这对程序执行是非常大的开销,请慎重调用
- 生成订单唯一id
$yCode = array('A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J'); $orderSn = $yCode[intval(date('Y') ...
- 分数拆分( Fractions Again, UVA 10976)-ACM
It is easy to see that for every fraction in the form (k > 0), we can always find two positive i ...
- QTP10破解
1. 下载QTP10.0版本 http://h30302.www3.hp.com/prdownloads/T6510-15063.zip?ordernumber=380454070&itemi ...
- api1
http://www.android-doc.com/reference/android/app/Fragment.html
- ckeditor字数限制
var maxlength = 200; _editor=CKEDITOR.replace("ckeditor",{height:'130px'}); _editor.on('ke ...
- 关于float与double
//float与double的范围和精度 1. 范围 float和double的范围是由指数的位数来决定的. // float的指数位有8位,而double的指数位有11位,分布如下:// float ...