#include <stdio.h>

int main() {
    int a ,marks;
    printf("Enter the marks\n");
    scanf("%d",&marks);
    if(marks>85 && marks<=100)
        {
        printf("student has secured grade A");
        }
    else if(marks>60 && marks<=85)
        {
        printf("student has secured grade B+");
        }
    else if(marks>40 && marks<=60)
        { 
        printf("student has secured grade B");
        }
    else if(marks>30 && marks<=40)
        {
        printf("student has secured grade C");
        }
    else
    {
        printf("student has failed");
    }
    return 0;
}