#include<stdio.h>
int main(){
    int age;
    scanf("%d",&age);
    printf("Enter Your age\n")
    if (age<0){
        printf("Invalid input\n");
    }
    else if (age>=18){
        printf("Eligible\n");
    }
    else {
        printf("Not Eligible\n");
    }
    return 0;
}