From 8c46e92b8085d38d97740d12dd31348bfa9b296d Mon Sep 17 00:00:00 2001
From: haozhuoD <2567769508@qq.com>
Date: Thu, 8 Jul 2021 02:05:17 +0800
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+### 完成实验环境搭建
+
+（由于是在win10上整，遇到较多挫折，还好全部解决了）
+
+win10 +  wsl2  + docker 桌面版 
+
+ 参考资料与视频：
+
+[yjc15873496491 / rCore-Tutorial-v3 · CODE CHINA (csdn.net)](https://codechina.csdn.net/yjc15873496491/rcore)
+
+[02.Demo演示_哔哩哔哩_bilibili](https://www.bilibili.com/video/BV1Lb4y1D7Pu)
+
+[04-运行镜像》rCore-Tutorial-v3 环境搭建和工具链指南_哔哩哔哩_bilibili](https://www.bilibili.com/video/BV1FX4y1w792?from=search&seid=7301290385508805990)
+
+
+
+
+
+### 练习代码
+
+
+
+实现返回任意时刻1_000_000_000秒之后的函数，判断是否是闰年。
+
+（部分题目已写但是仅是在网站上通过，并未保存，索性找时间把前面的题再做一遍以当巩固）
+
+今天龙芯杯比赛DDL所有进度被拖慢。
+
+```rust
+extern crate chrono;
+use chrono::{DateTime, Duration, Utc};
+
+// Returns a Utc DateTime one billion seconds after start.
+pub fn after(start: DateTime<Utc>) -> DateTime<Utc> {
+   return start + Duration::seconds(1_000_000_000);
+}
+```
+
+```rust
+pub fn is_leap_year(year: i32) -> bool {
+   let mut r = |n| year % n == 0;
+   r(4) && (!r(100) || r(400))
+}
+```
+
-- 
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