版权声明:https://blog.csdn.net/qq_43129582/article/details/83213278 https://blog.csdn.net/qq_43129582/article/details/83896001
C++
#include<iostream>
using namespace std;
int main()
{
int n;
int m=1; //桃子数量
while(cin>>n)
{
for(int i=n-1;i>0;i--)
{
m=(m+1)*2;
}
cout<<m<<endl;
m=1;
}
return 0;
}