#include <stdio.h>

int main(){
    int size,ind,k,i;
    
    scanf("%d",&size);
    if(size<=0){
        printf("Invalid Input");
    }
    
    int arr[size];
    for(ind=0;ind<size;ind++){
        scanf("%d",&arr[ind]);
    }
    
    
    printf("%d",size);
    printf("%d",arr[]);
}