import random


def print_with_prefix(s, prefix=""):
    if not isinstance(s, str):
        s = s.__repr__()
    s = s.split("\n")
    for l in s:
        print(prefix + l)


def seed_to_data(seed, random=True):
    if random:
        return (seed * 0x31415979 + 1) & 0xffffffff
    else:
        return seed


def check(ref, res):
    if isinstance(ref, int):
        return 0, 1, int(ref != res)
    else:
        shift = 0
        while((ref[0] != res[0]) and (len(res) > 1)):
            res.pop(0)
            shift += 1
        length = min(len(ref), len(res))
        errors = 0
        for i in range(length):
            if ref.pop(0) != res.pop(0):
                errors += 1
        return shift, length, errors


def randn(max_n):
    return random.randint(0, max_n-1)