Hdu 2018 - 母牛的故事

母牛的故事

 

 

AC代码：

#include <stdio.h>int main(){    int n,i;    while(scanf("%d",&n),n)    {        int m = 1,t = 0,a = 0,b = 0;        for(i=1; i<n; i++)        {            m = m+t;            t = a;            a = b;            b = m;        }        printf("%d\n", m+t+a+b);    }    return 0;}