Consider the following algorithm: int f(n) /* n is a positive integer */ if (n <=3) return n  int sum = f(n-1) if (n is even)          return sum + f(n-2)  else return sum + f(n-3)   Trace execution of f(6) by drawing the recursion tree. Show all function calls (callers and called functions), and intermediate results; and show what f(6) returns. Make sure that you draw all subtrees even if some are identical

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
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Consider the following algorithm:

int f(n)

/* n is a positive integer */

if (n <=3) return n 

int sum = f(n-1)

if (n is even)

         return sum + f(n-2)

 else return sum + f(n-3)

 

Trace execution of f(6) by drawing the recursion tree. Show all function calls (callers and called functions), and intermediate results; and show what f(6) returns. Make sure that you draw all subtrees even if some are identical.

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