内容简介:Initially, there is a Robot at position (0, 0). Given a sequence of its moves, judge if this robot makes a circle, which means it moves back to the original place.The move sequence is represented by a string. And each move is represent by a character. The
Initially, there is a Robot at position (0, 0). Given a sequence of its moves, judge if this robot makes a circle, which means it moves back to the original place.
The move sequence is represented by a string. And each move is represent by a character. The valid robot moves are R (Right), L (Left), U (Up) and D (down). The output should be true or false representing whether the robot makes a circle.
Example 1:
Input: “UD”
Output: true
Example 2:
Input: “LL”
Output: false
return moves.filter({$0 == "U"}).count == moves.filter({$0 == "D"}).count && moves.filter({$0 == "R"}).count == moves.filter({$0 == "L"}).count
(随着网站访问量的激增,服务器配置只得一再升级以维持网站不“404 Not Found”,所以网站的维护费用也在不断上涨……(目前的阿里云服务器ECS+云数据库RDS+域名购买+七牛云的费用是2200元/年),为了能不放弃该网站,所以我又把打赏链接放上来啦~所有打赏金额都会被记账并投入博客维护中,感谢厚爱,多多关照~)
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持 码农网
猜你喜欢:本站部分资源来源于网络,本站转载出于传递更多信息之目的,版权归原作者或者来源机构所有,如转载稿涉及版权问题,请联系我们。
Redis设计与实现
黄健宏 / 机械工业出版社 / 2014-6 / 79.00
【官方网站】 本书的官方网站 www.RedisBook.com 提供了书本试读、相关源码下载和勘误回报等服务,欢迎读者浏览和使用。 【编辑推荐】 系统而全面地描述了 Redis 内部运行机制 图示丰富,描述清晰,并给出大量参考信息,是NoSQL数据库开发人员案头必备 包括大部分Redis单机特征,以及所有多机特性 【读者评价】 这本书描述的知识点很丰富,......一起来看看 《Redis设计与实现》 这本书的介绍吧!