"Master the logic of arrangement! Let's solve the mysteries of the Desert! | 掌握排列的逻辑！让我们解开沙漠之谜！"
Chapter 2: Combinatorial Logic | 第二章：组合逻辑
有趣的推理
Permutation Problems
Press [ENTER] to Begin | 按 [回车键] 开始
schedule
Duration | 时长
15 Mins | 15分钟
stars
Reward | 奖励
500 XP
bar_chart
Difficulty | 难度
Intermediate | 中级