标签:des style java color os strong 数据 io
2 4
4 22
#include<stdio.h>
int fun(int n)
{
if(n==1) return 1;
return 2*(fun(n-1)+1);
}
int main()
{
int n;
while(scanf("%d",&n)!=EOF)
printf("%d\n",fun(n));
return 0;
}
标签:des style java color os strong 数据 io
原文地址:http://blog.csdn.net/qq_16767427/article/details/38110213