Friday, 16 August 2013

Bunny Ears

We have bunnies standing in a line, numbered 1, 2, ... The odd bunnies (1, 3, ..) have the normal 2 ears. The even bunnies (2, 4, ..) we'll say have 3 ears, because they each have a raised foot. Recursively return the number of "ears" in the bunny line 1, 2, ... n (without loops or multiplication). 

bunnyEars2(0) → 0
bunnyEars2(1) → 2
bunnyEars2(2) → 5

Solution:


public int bunnyEars2(int bunnies) {
  /*Base condition*/
  if(bunnies == 0)
     return 0;
  
  /*For odd bunnies*/
  if(bunnies% 2== 0)
     return bunnyEars2(bunnies-1) + 3;
  else  /*For even bunnies*/
     return bunnyEars2(bunnies-1) + 2;
}

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