HBC229748kingdom,树,数据结构Sum of gcd of Tuples (Hard)题解 给n,k n,kn,k，求： ∑a1=1k∑a2=1k...∑an=1kgcdmod109+7sum_{a_1=1}^k sum_{a_2=1}^k...sum_{a_n=1}^k {gcd}... 算法基础篇 2023-11-15 49 #HBC229748kingdom #树 #数据结构Sum of gcd of Tuples (Hard)题解
