epee_no_front's Notes

\begin{aligned}h(a,b,c,n)&=h(a\ mod\ c,\ b\ mod\ c,\ c,\ n)\\&+2\left\lfloor\frac{b}{c}\right\rfloor f(a\ mod\ c,\ b\ mod\ c,\ c,\ n)+2\left\lfloor\frac{a}{c}\right\rfloor g(a\ mod\ c,\ b\ mod\ c,\ c,\ n)\\&+\left\lfloor\frac{a}{c}\right\rfloor^2\frac{n(n+1)(2n+1)}{6}+\left\lfloor\frac{b

# latex加粗字体 [TOC] ## 加粗 ```latex $\bold{f(L,R)=R-L+1}$ ``` 效果：  ## 加粗斜体 ```latex $\symbol{f(L,R)=R-L+1}$ ``` 效