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#include     //求解，如何改正，输错后如何再输一个数
void main( )
  {   
 int  mark;
      int  n=0 ,   sum=0 ;
      int  max=0 ,  min=100 ;
  
      for (  ; ; ) 
         {    scanf("%d", &mark);
            if ( mark > 100 )
              {   printf(" Mark > 100 , Please  reinput \n ");
               continue;               
              }


            if ( mark==-1)
                break;
            n ++ ;
            sum=sum + mark ;


            if( mark > max )
                 max = mark ;
            if( mark < min )
                 min = mark ;          
         }
 


        sum=sum/ n ;
      printf("max =%d , min = %d, aver = %d \n", max , min , sum);   
  }