#include<stdio.h>
int main(){
    intn,i,num;
    if (scanf("%d",&n) !=1 || n<1){
        printf("Invalid input");
        return 0;
    }
    int bookIDS[i]=num;
    for (i=0,i<n;i++){
        printf("%d",bookIDS[i]);
    }
    printf("\n");
    return 0;
}