Loading docs/math/mobius.md +9 −0 Original line number Diff line number Diff line Loading @@ -105,6 +105,15 @@ $$ } ``` ???+note "二维数论分块" 求 $$ \sum_{i=1}^{\min (n,m)}\left\lfloor\frac{n}{i} \right\rfloor\left\lfloor\frac{m}{i} \right\rfloor $$ 此时可将代码中 `r = n/(n/i)` 替换成 `r = min(n/(n/i), m/(m/i))` * * * ## 积性函数 Loading Loading
docs/math/mobius.md +9 −0 Original line number Diff line number Diff line Loading @@ -105,6 +105,15 @@ $$ } ``` ???+note "二维数论分块" 求 $$ \sum_{i=1}^{\min (n,m)}\left\lfloor\frac{n}{i} \right\rfloor\left\lfloor\frac{m}{i} \right\rfloor $$ 此时可将代码中 `r = n/(n/i)` 替换成 `r = min(n/(n/i), m/(m/i))` * * * ## 积性函数 Loading
