задача, как у дебила

#include <stdio.h>

int main()
{
    long long n;
    int null;
    int ONE;
    int b;

    null = 0;
    ONE = 1;
    b = 92;

    char M[93] = {0};

    scanf("%llu", &n);

    if(n == null)
    {
        printf("%d", null);
    }

    while(ONE <= n)
    {
        char a = 0;
        long long x, y;
        x = ONE;
        y = ONE;

        while(x < n - y + ONE)
        {
            x = x + y;
            y = x - y;
            a++;
        }

        M[a] = ONE;
        n = n - x;
    }

    while(M[b] == 0)
    {
        b--;
    }

    for(; b > - 1; b--)
    {
        printf("%d", M[b]);
    }
}