feat: Update categories in function problem analysis posts

Author: jamiesun

_posts/2024-07-03-Olympiad-function-problem-3.md

@@ -2,7 +2,7 @@
 layout: post
 title:  "信息奥赛一本通函数题库解析-3: 最大数max(x,y,z) "
 date:   2024-07-03 01:03:06 +0800
-categories: 竞赛 数学 函数 题库解析
+categories: algorithms olympiad functions
 ---
 
 原题链接: [](http://ybt.ssoier.cn:8088/problem_show.php?pid=1152)

_posts/2024-07-03-olympiad-prime-numbers-analysis-4.md

@@ -2,9 +2,10 @@
 layout: post
 title:  "信息奥赛一本通函数题库解析-4: 绝对素数"
 date:   2024-07-03 01:16:39 +0800
-categories: olympiad-prime-numbers
+categories: algorithms olympiad functions
 ---
 
+
 原题链接: [](http://ybt.ssoier.cn:8088/problem_show.php?pid=1153)
 
 ![](https://raw.githubusercontent.com/jamiesun/images/master/default/p8ZvfS.png)

_posts/2024-07-03-palindromic-three-digit-numbers.md

@@ -2,9 +2,10 @@
 layout: post
 title: "信息奥赛一本通函数题库解析-4: 回文三位数"
 date: 2024-07-03 01:24:37 +0800
-categories: math olympiad functions
+categories: algorithms olympiad functions
 ---
 
+
 原题链接: [](http://ybt.ssoier.cn:8088/problem_show.php?pid=1155)
 
 ![](https://raw.githubusercontent.com/jamiesun/images/master/default/F9bxon.png)