Update resources.md (#713)

diff --git a/docs/intro/resources.md b/docs/intro/resources.md
index fb9206e..eaeacf7 100644 (file)
--- a/docs/intro/resources.md
+++ b/docs/intro/resources.md
@@ -82,3 +82,5 @@
 - [POJ 训练计划](http://blog.csdn.net/skywalkert/article/details/46594541)
 - [USACO](http://train.usaco.org/usacogate)
 - [洛谷试炼场](https://www.luogu.org/training/mainpage)
+- [-Morass- 贴在 Codeforces 上的一份题单](https://codeforces.com/blog/entry/55274)
+- [北京大学暑期课课件例题](https://vjudge.net/article/446)