#include<stdio.h>
typedef struct student{
    int id;
    char name[20];
    int age;
}saran;

int main(){
    int size,ind;
    scanf("%d",&size);
    if(size>0){
        printf("Invalid Input");
        return 0;
    }
    saran stud[size];
    for(ind=0;ind<size;ind++){
        printf("ID:%d,",stud[ind].id);
        printf("Name:%d,",stud[ind].name);
        printf("Age:%d,",stud[ind].age);
    }
    return 0;
}