摘要:
"Manthan, Codefest 19 (open for everyone, rated, Div. 1 + Div. 2) D. Restore Permutation 构造+树状数组" 【Problem Description】 给你一个长度为$n$的数组,第$i$个元素$s_i$表示 阅读全文
摘要:
"Manthan, Codefest 19 (open for everyone, rated, Div. 1 + Div. 2) C. Magic Grid 构造" 【Problem Description】 给你一个$n$,构造一个$n\times n$的矩阵,使其满足任意一行,或一列的异或 阅读全文