class  Mathematics
{
static double ceil(double a)          //返回大于或等于A的整数
  {return  a=a>0.0?(int)a+1.0:(int)a; }
static double floor(double a)         //返回小于或等于A的整数
    {return  a=a>0.0?(int)a:(int)a-1; }
static double rint(double a)         //返回与A最接近的整数
    {return  a=a>0.0?(int)(a+0.5):(int)(a-0.5); }
static int abs(int a)               //返回a 的 绝对值
    {return   a=a>0?a:-a;}
static int max(int a,int b)         //返回a、 b中最大的值
    {return  a =a>b?a:b;}
static int min(int a,int b)         //返回a、b 中最小的值
   { return  a =a>b?b:a;}

  public static void main(String[] args) 
  {
    System.out.println("Hello World!");
    int i=min(3,5);
        System.out.println(i);
         i=abs(-65);
    System.out.println(i);
     i=max(6,9);
    System.out.println(i);
        System.out.println(ceil(1163.5685d) );
    System.out.println(floor(-1163.5685d) );
    System.out.println(rint(-2.5685d) );
    System.out.println(rint(-2.0685d) );
    System.out.println(rint(2.5685d) );
    System.out.println(rint(2.2685d) );
  }
}