1020 问题 C: [编程入门]猴子吃桃的问题

时间限制: 1s 内存限制: 128MB 提交: 61839 解决: 43281
题目描述
猴子吃桃问题。猴子第一天摘下若干个桃子，当即吃了一半，还不过瘾，又多吃了一个。 第二天早上又将剩下的桃子吃掉一半，又多吃一个。以后每天早上都吃了前一天剩下的一半零一个。 到第N天早上想再吃时，见只剩下一个桃子了。求第一天共摘多少桃子。
输入
N
输出
桃子总数
样例输入
10
样例输出
1534
提示
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