#include<stdio.h>
#include<math.h>
int main()
{
    int lim;
    scanf("%d",&lim);
    if(lim <-100 || lim >100)
    printf("Invalid Input\n");
    return 0;

    
}
if(lim<0)return 0;
int a =0, b=1;
while(a <= lim){
    printf("%d",a);
    int next =a+b;
    a=b;
    b=next;
    
}
return 0;
}