monkey

说明：  一只猴子在X天中一共吃了Y个桃子。已知这只猴子每天最多吃10个桃子，最少可以不吃桃子。问一共有多少种不同的吃法。
(A monkey in X days Y months were eating peaches. The monkey are known to eat each day up to 10 peaches, can at least do not eat peaches. Asked a number of different types of cooking.)