博客
关于我
leetcode之统计一致字符串的数目(C++)
阅读量:160 次
发布时间:2019-02-28

本文共 927 字,大约阅读时间需要 3 分钟。

参考链接

  1. https://leetcode-cn.com/problems/count-the-number-of-consistent-strings

题目描述

给你一个由不同字符组成的字符串 allowed 和一个字符串数组 words 。如果一个字符串的每一个字符都在 allowed 中,就称这个字符串是一致字符串。

请你返回words数组中一致字符串的数目。

在这里插入图片描述

解题思路

用哈希集合存储allowed字符串中的字母,然后逐个遍历words中的字符串是否有不存在与集合中的字母。

代码

class Solution {   public:    int countConsistentStrings(string allowed, vector
& words) { unordered_set
allowed_chars; int res = 0; for (int i = 0; i < allowed.size(); i ++) { allowed_chars.insert(allowed[i]); } for (int i = 0; i < words.size(); i ++) { int j = 0; for (; j < words[i].size(); j ++) { if (allowed_chars.count(words[i][j]) == 0) { break; } } if (j == words[i].size()) { res ++; } } return res; }};

转载地址:http://ulxj.baihongyu.com/

你可能感兴趣的文章
nmon_x86_64_centos7工具如何使用
查看>>
NN&DL4.1 Deep L-layer neural network简介
查看>>
NN&DL4.3 Getting your matrix dimensions right
查看>>
NN&DL4.7 Parameters vs Hyperparameters
查看>>
NN&DL4.8 What does this have to do with the brain?
查看>>
nnU-Net 终极指南
查看>>
No 'Access-Control-Allow-Origin' header is present on the requested resource.
查看>>
No 'Access-Control-Allow-Origin' header is present on the requested resource.
查看>>
NO 157 去掉禅道访问地址中的zentao
查看>>
no available service ‘default‘ found, please make sure registry config corre seata
查看>>
No compiler is provided in this environment. Perhaps you are running on a JRE rather than a JDK?
查看>>
no connection could be made because the target machine actively refused it.问题解决
查看>>
No Datastore Session bound to thread, and configuration does not allow creation of non-transactional
查看>>
No fallbackFactory instance of type class com.ruoyi---SpringCloud Alibaba_若依微服务框架改造---工作笔记005
查看>>
No Feign Client for loadBalancing defined. Did you forget to include spring-cloud-starter-loadbalanc
查看>>
No mapping found for HTTP request with URI [/...] in DispatcherServlet with name ...的解决方法
查看>>
No mapping found for HTTP request with URI [/logout.do] in DispatcherServlet with name 'springmvc'
查看>>
No module named 'crispy_forms'等使用pycharm开发
查看>>
No module named 'pandads'
查看>>
No module named cv2
查看>>