C语言猴子吃桃

题目：

代码实现：

#include <stdio.h>
int main () {
    int n = 0;
    int peach = 1;
    scanf("%d", &n);
    for (int i = 1; i <n; i++) {
        peach = (peach + 1) * 2;
    }
    printf("%d", peach);
}