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