杭电acm2070

http://acm.hdu.edu.cn/showproblem.php?pid=2070

斐波那契数列，关键在于类型的定义you can use 64bit integer: __int64，printf("%I64d\n");

#include<stdio.h>
int main()
{
    __int64 i,f[100];
    int n;
    f[0]=0;
    f[1]=1;
    for(i=2;i<=50;i++)
      f[i]=f[i-1]+f[i-2];
    while(scanf("%d",&n)&&(n!=-1))
       printf("%I64d\n",f[n]);
    return 0;
}