摘要：
In our daily life we often use 233 to express our feelings. Actually, we may say 2333, 23333, or 233333 ... in the same meaning. And here is the quest 阅读全文
摘要：
A - Jzzhu and Sequences Jzzhu has invented a kind of sequences, they meet the following property: You are given x and y, please calculate fn modulo 10 阅读全文