05 Mar '15 02:34>
There are n men in a village. Each of them has a piece of juicy information about the private life of someone they all know. They want to share the information so that every one of them has all of it. And they want to do all of this by phone because they're all sick with different contagious diseases. And it's 1951 so there are no conference calls.
How many calls is the least they have to make between themselves?
How many calls is the least they have to make between themselves?