#include <stdio.h>
struct stu {
    int num;
    float grade1;
    float grade2;
    float grade3;
    float grade;
    float ag;
}s[10],ss;

int main() 
{
	printf("                              1.Input\n");
	printf("                              2.Output\n");
	printf("                              3.Order\n");
	printf("                              4.Quit\n");
	char a;
	scanf("%c",&a);
	if(a=='i')
	{
	

	    printf("Please input info of the three students:\n");
	    for(int i=0;i<3;i++)
	    {
		scanf("%d%f%f%f",&s[i].num,&s[i].grade1,&s[i].grade2,&s[i].grade3);
	    }
	    for(int i=0;i<3;i++)
	    {
		   s[i].grade=s[i].grade1+s[i].grade2+s[i].grade3;
		   s[i].ag=s[i].grade/3;
	    }
	    for(int i=0;i<2;i++)
	    {
	    	ss=s[i];
	    	for(int j=i+1;j<3;j++)
	    	{
	    		if(s[i].grade>s[j].grade)
	    		{
	    			ss=s[i];
	    			s[i]=s[j];
	    			s[j]=ss;
				}
	    		
			}
		}
	    for(int i=0;i<3;i++)
	{
		printf("%d,%.1f,%.1f\n",s[i].num,s[i].grade,s[i].ag);
	}
	}
	else if(a=='o')
	printf("You are trying to Output info");
	else if(a=='m')
	printf("You are trying to Make things ordered");
	else if(a=='q')
	printf("You are about to Quit");
	else
	printf("Wrong input");
	
	return 0;
}