One day, a friend asked "12 large shaped balls, one of which is the weight and others, use a weightless balance, can you find this weight different ball? And judge that this ball is light Still heavy. "
This type of question has long been heard, it is said to have a large company's interview topic, but never thought about the answer. Now people have asked, thinking about long, no hairpin. After the online query, find an answer, use the corrective coding principle. For this reason, when you go to school, learn the principle of data communication, and have learned this method, just involving a lot of mathematical operations. At that time, it was uncomfortable, thinking that I was waiting for the customs, I was only afraid of the poor, there was no opportunity to use, it was useless. The thing, it's awkward, even the basic principles and thoughts have not been learned.
What is useless at the time, is really useless? I am afraid that I am too shallow, I can't really realize his role.
