import hashlib
def mystery(x):
# Convert input to string
s = str(x)
# A long and complicated salt to prevent precomputation
salt = "7g3h2i1j0k9l8m7n6o5p4q3r2s1t0u9v8w7x6y5z4a3b2c1d0e9f8g7h6i5j4k3l2m1n0o9p8q7r6s5t4u3v2w1x0y9z8"
# Initial hash
h = hashlib.sha256((s + salt).encode()).digest()
# Many iterations to slow down brute force
for _ in range(1000):
h = hashlib.sha256(h).digest()
# Compare against the target hash
target = "d15e2a3b4c5d6e7f8a9b0c1d2e3f4a5b6c7d8e9f0a1b2c3d4e5f6a7b8c9d0e1f2"
return h.hex() == target
import math
import struct
def mystery(x):
try:
y = float(x)
raw = int.from_bytes(struct.pack(">d", y), "big")
except Exception:
return False
if y == y:
return False
# A shuffled-looking reconstruction of the required 64-bit pattern.
nibbles = [14, 15, 10, 12, 13, 0, 0, 15, 13, 10, 11, 0, 8, 15, 15, 7]
want = 0
for i, v in enumerate(nibbles):
want |= v << (4 * i)
z = raw ^ want
z |= z >> 32
z |= z >> 16
z |= z >> 8
z |= z >> 4
z |= z >> 2
z |= z >> 1
return (
(z & 1) == 0
and ((raw >> 52) & 0x7ff) == 0x7ff
and bool(raw & (1 << 51))
and math.isnan(y)
)
import math
def mystery(x):
s = str(x)
if len(s) != 6:
return False
# Convert to list of ASCII values
a = list(map(ord, s))
# Condition 1: first two bytes sum to 200
if a[0] + a[1] != 200:
return False
# Condition 2: third byte minus fourth byte equals 1
if a[2] - a[3] != 1:
return False
# Condition 3: fifth byte times sixth byte equals 10000
if a[4] * a[5] != 10000:
return False
# Condition 4: sum of all bytes is 600
if sum(a) != 600:
return False
# Condition 5: product of all bytes modulo 1000 is 0
prod = 1
for v in a:
prod = (prod * v) % 1000
if prod != 0:
return False
# Condition 6: the integer formed by the first three bytes is a perfect square
num = a[0] * 256 * 256 + a[1] * 256 + a[2]
root = int(math.isqrt(num))
if root * root != num:
return False
return True
import math
def mystery(x):
try:
if isinstance(x, bool):
return False
if isinstance(x, str):
s = x.strip()
if not s or any(c not in "0123456789" for c in s):
return False
y = int(s, 10)
elif isinstance(x, float):
return False
else:
y = int(x)
except Exception:
return False
n = 10941738641570527421809707322040357612003732945449205990913842131476349984288934784717997257891267332497625752899781833797076537244027146743531593354333897
if not (1 < y and y * y < n):
return False
return n % y == 0
def mystery(x):
if isinstance(x, str):
try:
y = int(x)
except ValueError:
return False
elif isinstance(x, int):
y = x
else:
return False
p = 2305843009213693951 # 2**61 - 1, a Mersenne prime
r = 1234567890123456789
if y <= 0 or y >= p:
return False
# Evaluate the polynomial: x^3 - r*x^2 + x - r (mod p)
y2 = pow(y, 2, p)
y3 = pow(y, 3, p)
term2 = (r * y2) % p
val = (y3 - term2 + y - r) % p
return val == 0
import hashlib
def mystery(x):
if not isinstance(x, str):
return False
if len(x) != 43:
return False
try:
y = "".join(chr(ord(c) - 1) for c in x[::-1])
except Exception:
return False
if any(ord(c) < 32 or ord(c) > 126 for c in x):
return False
h = hashlib.sha256(y.encode("ascii")).hexdigest()
return h == "d7a8fbb307d7809469ca9abcb0082e4f8d5651e46d3cdb762d02d0bf37c9e592"
import math
def mystery(x):
# Accept either string or integer input
if isinstance(x, str):
try:
y = int(x)
except ValueError:
return False
elif isinstance(x, int):
y = x
else:
return False
# Must be positive
if y <= 0:
return False
# Prime check using trial division
def is_prime(n):
if n < 2:
return False
for i in range(2, int(math.isqrt(n)) + 1):
if n % i == 0:
return False
return True
if not is_prime(y):
return False
# Must be a palindrome in decimal
s = str(y)
if s != s[::-1]:
return False
# Must equal sum of squares of first n natural numbers for some n
found = False
for n in range(1, int(math.isqrt(6 * y)) + 1):
if n * (n + 1) * (2 * n + 1) // 6 == y:
found = True
break
if not found:
return False
# Must be a Fibonacci number (check using the perfect square property)
t = 5 * y * y
a = math.isqrt(t + 4)
if a * a != t + 4:
b = math.isqrt(t - 4)
if b * b != t - 4:
return False
# Congruence condition
if y % 12345 != 5:
return False
return True
import hashlib
import hmac
def mystery(x):
if not isinstance(x, str):
return False
if len(x) != 9:
return False
try:
raw = x.encode("latin1")
except UnicodeEncodeError:
return False
mask = bytes([0x33, 0x55, 0x1d, 0x12, 0x72, 0x0e, 0x4c, 0x45, 0x45])
candidate = bytes(a ^ b for a, b in zip(raw, mask))
digest = hashlib.pbkdf2_hmac(
"sha1",
candidate,
b"sa\x00lt",
4096,
16,
).hex()
return hmac.compare_digest(digest, "56fa6aa75548099dcc37d7f03425e0c3")
def mystery(x):
if not isinstance(x, str):
return False
s = x.strip()
if len(s) != 16:
return False
try:
b = s.encode('latin-1')
except:
return False
# Obfuscated key
obf_key = [0x64, 0x52, 0x54, 0x45, 0x52, 0x43, 0x7C, 0x52, 0x4E, 0x06, 0x05, 0x04, 0x03, 0x02, 0x01, 0x00]
key = bytes(k ^ 0x37 for k in obf_key)
# XOR
c = bytes(b[i] ^ key[i] for i in range(16))
# Reverse
d = c[::-1]
target = b'\x03\x05\x07\x05\x57\x57\x47\x15\x0a\x18\x11\x09\x08\x19\x10\x03'
return d == target
import hashlib
import hmac
def mystery(x):
if not isinstance(x, str):
return False
try:
raw = x.encode("latin1")
except UnicodeEncodeError:
return False
if len(raw) != 28:
return False
if any(b < 33 or b > 126 for b in raw):
return False
order = [(5 * i + 11) % 28 for i in range(28)]
pad = bytes.fromhex("1f1b555f7f573045582f55030f314b54120a0512451e2b091b4f570e")
msg = bytes(raw[j] ^ pad[i] for i, j in enumerate(order))
key = bytes(v ^ 0x2F for v in (0x65, 0x4A, 0x49, 0x4A))
target = "5bdcc146bf60754e6a042426089575c75a003f089d2739839dec58b964ec3843"
return hmac.compare_digest(
hmac.new(key, msg, hashlib.sha256).hexdigest(),
target,
)