#include<stdio.h>
int main()
{
    int age;
    printf("enter the age:");
    scanf("%d",&age);
    
    if(age<0||a>100)
    {
    printf("Invalid input");
    }
    else if(18<0)
    {
        printf("Not eligible");
    }
    else
    {
        printf("Eligible");
    }
    return 0;
    
}