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