请编写程序,找出一段给定文字中出现最频繁的那个英文字母. 输入格式: 输入在一行中给出一个长度不超过 1000 的字符串.字符串由 ASCII 码表中任意可见字符及空格组成,至少包含 1 个英文字母,以回车结束(回车不算在内). 输出格式: 在一行中输出出现频率最高的那个英文字母及其出现次数,其间以空格分隔.如果有并列,则输出按字母序最小的那个字母.统计时不区分大小写,输出小写字母. 输入样例: This is a simple TEST. There ARE numbers and other…
At the beginning of every day, the first person who signs in the computer room will unlock the door, and the last one who signs out will lock the door. Given the records of signing in's and out's, you are supposed to find the ones who have unlocked a…
点我阅读原文 最近利用闲暇时间做了一下 PTA Basic Level[1] 里的题,里面现在一共有 95 道题,这些题大部分很基础,对于刷倦了 leetcode 的小伙伴可以去里面愉快的玩耍哦. 这里我挑了三个挺有意思的题来做个简单记录,欢迎和大家一起讨论交流. 请听题: 第一题:1009 说反话 题目描述 给定一个英语句子,各个单词之间用空格分隔.要求你编写程序,将句中所有单词的顺序颠倒输出. 输入示例 Hello World Here I Come 输出示例 Come I Here Wor…
Deepest Root A graph which is connected and acyclic can be considered a tree. The hight of the tree depends on the selected root. Now you are supposed to find the root that results in a highest tree. Such a root is called the deepest root. Input Spec…