#include <stdio.h>
int main()
{
  printf("                              1.Input\n                              2.Output\n                              3.Order\n                              4.Quit\n");
  
  char a;
  for(;;)
  {
  a=getchar();
  switch(a)
  {
  case'i': printf("Please input info of the three students:\n");
  struct Student
  {
  	int n;
  	float x;
  	float y;
  	float z;
  	float s;
	float w;
  };
  int i,j,k;
  struct Student stu[3],t;
  for(i=0;i<3;i++)
  {
  	scanf("%d%f%f%f",&stu[i].n,&stu[i].x,&stu[i].y,&stu[i].z);
  }
  stu[0].s=stu[0].x+stu[0].y+stu[0].z;
  stu[1].s=stu[1].x+stu[1].y+stu[1].z;
  stu[2].s=stu[2].x+stu[2].y+stu[2].z;
  stu[0].w=stu[0].s/3;
  stu[1].w=stu[1].s/3;
  stu[2].w=stu[2].s/3;
  for(i=0;i<2;i++)
  {
  	k=i;
  	for(j=i+1;j<3;j++)
  	{
  	  if(stu[k].w<stu[j].w) 
		 k=j;
	  	
	}
	t=stu[k];stu[k]=stu[i];stu[i]=t;
  }
  for(j=0;j<3;j++)
  {
  	printf("学号  %d  总成绩  %.1f  平均成绩  %.1f\n",stu[j].n,stu[j].s,stu[j].w);
  }
  break;
  
  case'm': printf("You are trying to Make things ordered");break;
  case'q': printf("You are about to Quit");break;
  case'\n': printf("\n");break;
  default: printf("Wrong input");
  }
  }
		     
	   
}