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传送门：Transform 题意： 题意：t 组数据，每组给出 n 个数与 m 组询问，每组询问有 s、t 两个数，对于数 s 现给出两种变换，一种是改变 s 二进制位的某一位，即 0 变 1 或 1 变 0，另一种是让…

Angel was caught by the MOLIGPY! He was put in prison by Moligpy. The prison is described as a N * M (N, M <…

Farmer John has been informed of the location of a fugitive cow and wants to catch her immediately. He starts …

给定一个由不同的小写字母组成的字符串，输出这个字符串的所有全排列。 我们假设对于小写字母有'a' < 'b' < ... < 'y' < 'z'，而且给定的字符串中的字母已经按照从小到大的顺序排列…