#include<stdio.h>

int main(){
    int age;
    printf("Enter the age: ");
    scanf("%d", &age);
    if(age < 0) {
        printf("Invalid input\n");
    }else{
        printf("Eligible\n");
    }else if(age <18 && age <= 100){
        printf("Eligible\n");
    }else {
        printf("Invalid input\n");
    }
    return 0;
}