Algorithms | Analysis of Algorithms | Question 14
In the following C function, let n >= m.
int gcd(n,m){ if (n%m ==0) return m; n = n%m; return gcd(m, n);} |
How many recursive calls are made by this function?
(A) 
(logn)
(B) 
(n)
(C) (loglogn)
(D) (sqrt(n))
(A) A
(B) B
(C) C
(D) D
Answer: (A)
Explanation: Above code is implementation of the Euclidean algorithm for finding Greatest Common Divisor (GCD).
Please see http://mathworld.wolfram.com/EuclideanAlgorithm.html for time complexity.
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