docs: add a description of the solution to lcci problem: No.08.02

YangFong · YangFong · commit 4f9aed44d06a · 2022-03-18T13:31:08.000+08:00
No.08.02.Robot in a Grid
diff --git a/lcci/08.02.Robot in a Grid/README.md b/lcci/08.02.Robot in a Grid/README.md
@@ -32,6 +32,12 @@
 
 <!-- 这里可写通用的实现逻辑 -->
 
+DFS 思路
+
+**剪枝：**
+
+防止多次进入同一个位置，走过的位置要将其置为 1
+
 <!-- tabs:start -->
 
 ### **Python3**
