UVA 10499 正义的土地

好吧，我理解能力有问题

http://blog.youkuaiyun.com/frankiller/article/details/7673258

#include <stdio.h>
int main()
{double n;
 while (scanf("%lf",&n)&& n>=0)
 {if (n<=1) printf("0%%\n");
       else printf("%.0lf%%\n",25*n);
 }

 return 0;
}