onlyblues

摘要： B. GCD Partition While at Kira's house, Josuke saw a piece of paper on the table with a task written on it. The task sounded as follows. There is an a 阅读全文

摘要： D. Fixed Prefix Permutations You are given $n$ permutations $a_1, a_2, \dots, a_n$, each of length $m$. Recall that a permutation of length $m$ is a s 阅读全文