Update splay.md

修改了bzoj的权限题链接

diff --git a/docs/ds/splay.md b/docs/ds/splay.md
index 7aaa591..c48fbb7 100644 (file)
--- a/docs/ds/splay.md
+++ b/docs/ds/splay.md
@@ -424,7 +424,7 @@ int main() {
 
 ## 练习题
 
-[bzoj 1552\[Cerc2007\]robotic sort](https://www.lydsy.com/JudgeOnline/problem.php?id=1552)（权限题）
+[luogu P4402 \[Cerc2007\]robotic sort 机械排序](https://www.luogu.org/problemnew/show/P4402)
 
 [luogu P3380【模板】二逼平衡树（树套树）](https://www.luogu.org/problemnew/show/P3380)