#include <stdio.h>

int main() 
{
    int a,b,c;
    scanf("%d",&a);
    printf("enter your first subject mark:%d\n",a);
    scanf("%d",&b);
    printf("enter your second subject mark:%d\n",b);
    scanf("%d",&c);
    printf("enter your third subject mark:%d\n",c);
    if (a/3 + b/3 + c/3 <35)
    {
        printf("student is fail");
    } 
    else if (a/3 + b/3 +c/3 >= 60)
    {
        printf("student obtained first class");
    }        
    else
    {
        printf("student obtained second class");
    }
    return 0;
}