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题目背景 呦西热巴思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达思密达

题目描述 KFC有n个牛粪，但小明每x分钟偷吃了1个，店员在小明正在吃了第y个小时牛粪时，抓住了他。请问现在还有几个牛粪？？？？？？？？？？

输入格式 三个正整数n,x,y.

输出格式 还剩多少个牛粪？

输入输出样例 无

说明/提示 想要提示？不可能！！！！！！！！！！！！！！！！