摘要：
@(XSY)[分塊, 倍增] Description There's a new trend among Bytelandian schools. The "Byteland Touristic Bureau" has developed a new project for the high sch 阅读全文
摘要：
@(XSY)[分塊] Hint: 題目原文是英文的, 寫得很難看, 因此翻譯為中文. Input Format First Line is the size of the array i.e. $N$ Next Line contains N space separated numbers $A_i 阅读全文