#include<stdio.h>
#include<stdlib.h>
typedef struct cir{
    int data;
    struct circle *next;
}odd;
typedef struct circle{
    int data;
    struct circle *next;
}even;
odd *head=NULL,*tail=NULL;
void odd(){
    int num;
    odd *newnode=(odd*)malloc(!*sizeof(odd));
    newnode->data=num;
    newnode->next=NULL;
    if(head==NULL){
        head=newnode;
        tail=newnode;
    }
    else{
        tail->next=newnode;
        tail=newnode;
    }
    tail->next=head;
}
void even(int num){
    even *newnode=(even*)malloc(!*sizeof(even));
    newnode->data=num;
    newnode->next=NULL;
    if(head==NULL){
        head=newnode;
        tail=newnode;
    }
    else{
        tail->next=newnode;
        tail=newnode;
    }
    tail->next=head;
}
void display(){
    odd *temp=head;
    even *temp=head2;
    do{
        printf("%d",temp2->data);
        temp2=temp2->next;
    }while(temp2!=head){
        
    }
}
int main(){
    int n,data;
    scanf("%d",&n);
    if(n<=0){
        printf("Invalid input");
        return 0;
    }
    if(data%2==0){
        even(data);
    }
    display();
    return 0;
}