c++ - Not sure what this recursive function returns -


i reading recursive functions, , have been trying figure out mathematical formula one. thought maybe logarithmic function, not seem it. if point me in right direction, appreciate it.

unsigned f(unsigned n){     if(n<2)     return 1;      return 1 + f(n/2); }

it logarithm function, base 2. more specifically, it's ceil 1 + floor(log2(n)).


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