A_Big_Jiong

摘要： 求下面表达式的值， $$\prod_{i=1}^{A} \prod_{j=1}^{B} \prod_{k=1}^{C} \left( \frac{lcm(i,j)}{gcd(i,k)} \right)^{f(type)} \pmod{p}$$ $$f(0)=1,$$ $$f(1)=i \times j \times k,$$ $$f(2) = gcd(i,j,k).$$ $$A,B,C \leqslant 10^5$$ 阅读全文