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