就是这题：
There are n coins in a line. (Assume n is even). Two players take turns
to take a coin from one of the ends of the line until there are no more
coins left. The player with the larger amount of money wins.
Would you rather go first or second? Does it matter?
Assume that you go first, describe an algorithm to compute the
maximum amount of money you can win.
这里有完整解答： http://www.ihas1337code.com/2011/02/coins-in-line.html
