#include <stdio.h>
int main()
{
    int mark;
    scanf("%d",&mark);
    printf("The mark of the student=%d\n",mark);
    if(mark>85 && mark<=100)
    {
        printf("The grade of the student is A\n");
    }
    else if(mark>60 && mark<=85)
    {
        printf("The grade of the student is B+\n");
    }
    else if(mark>40 && mark<=60)
    {
        printf("The grade of the student is B");
    }
    else if(mark>30 && mark<=40)
    {
        printf("The grade of the student is C");
    }
    else
    {
        printf("The student has FAILED");
    }
    return 0;
}