#include "util.h"
#include "math.h"

uint ulong_len(ulong n) { // get the digit length of a number
    int len = 0;
    while (n != 0) {
        n = n / 10;
        ++len;
    }
    return len;
}

uint ndigit(ulong n, uint i) { // OBS: index order is reversed
	long den = pow(10, i);
	return (n/den) % 10;
}