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…
This time you are asked to tell the difference between the lowest grade of all the male students and the highest grade of all the female students. Input Specification: Each input file contains one test case. Each case contains a positive integer N, f…
Java is one of the most popular programming language nowadays. There are plenty of books for beginners. But to those who have programmed with Java for a while, some of them may look somehow simple and redundant. The beginner’s books do not bring fres…
解决IDEA 编译级别 Error:java: Target level '1.6' is incompatible with source level '1.7'. A target level '1.7' or better is required 打开之后发现有一个编译级别设置的不对 更改如下: 如果上面的方法还是不行的话,就建议你改一下pom文件中的maven插件编译级别,可以通过搜索所有的pom.xml,1.6这个关键词,就看出来了. <profiles> <profile&g…
