#include<stdio.h>
int main()
{
    int l;
    scanf("%d",&l);
    if(l<0)
    {
        printf("Invalid input");
        return 0;
    }
    int a=0,b=1,c;
    printf("%d",a);
    while(b<=l)
    {
        printf("d",b)
    }
        c=a+b;
        a=b;
        b=c;
    return 0;
}