CF757E Bash Plays with Functions

标签：Functions Plays sum uv CF757E Bash

CF757E Bash Plays with Functions

\[f_0(n) = \sum_{uv = n} [u ⊥ v] \]

\[f_r(n) = \sum_{uv = n} \frac{f_{r - 1}(u) + f_{r - 1}(v)}{2} \]

CODE

\[f_r(n) = \sum_{u | n} f_{r - 1}(u) \]

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标签：Functions,Plays,sum,uv,CF757E,Bash
From： https://www.cnblogs.com/Pizza1123/p/16809393.html