《Cracking the Coding Interview》——第6章：智力题——题目5

2014-03-20 01:08

题目：扔鸡蛋问题。有一个鸡蛋，如果从N楼扔下去恰好会摔碎，低于N楼则不碎，可以继续扔。给你两个这样的鸡蛋，要求你一定得求出N，怎么扔才能减少最坏情况下的扔的次数？

解法：为了让worst case得到最优化，就需要让best case和worst case最接近。具体做法请参见书上题解，因为我一直在想着二分，实在是摸不着头脑。

代码：

 1 // 6.5 Given 100 floors and 2 eggs.

 2 // If the egg can sustain a dropping from nth floor, and will break for higher drop, please find a way to determine n, and minimize the number of droppings.

 3 // Answer:

 4 //    That's indeed a brain teaser with mathematical principle.

 5 //    It just doesn't make sense to me, why it is optimized when num_of_drop(egg1) + num_of_drop(egg2) always stays the same.

 6 // Perhaps you should read the book yourself. I do hope that I don't face such a question. Quite a teaser, tease me more.

 7 int main()

 8 {

 9     return 0;

10 }