t-wy

ツイート Tweet：https://twitter.com/fwarashi/status/1360561289215373314

Github：https://github.com/kurenaif/kurenaif_valentine_problems

ハッシュタグ Hashtag: #kurenaifChallenge (https://twitter.com/search?q=%23kurenaifChallenge)

* GCD (Greatest common divisor・最大公約数) may also be known as HCF, GCF or HCD, GCM
    H: highest
    F: factor
    M: measure

t-wy

Parts of the functionality may have been broken as App Store allows more flexible pricing options than the original tiers.

t-wy

import turtle
turtle.tracer(False)
turtle.hideturtle()

"""
Paint Application using Python Turtle
by t-wy
"""

def save():

t-wy

javascript: {
    let video = document.getElementsByTagName("video")[0];
    let canvas = document.createElement("canvas");
    canvas.width = video.videoWidth;
    canvas.height = video.videoHeight;
    canvas.getContext("2d").drawImage(video, 0, 0, canvas.width, canvas.height);
    canvas.style.position = "fixed";
    canvas.style.left = "0";
    canvas.style.top = "0";
    canvas.style.zIndex = "99999";

t-wy

"""Disassembler of Python byte code into mnemonics."""

import sys
import types
import collections
import io

from opcode import *
from opcode import __all__ as _opcodes_all
from opcode import _nb_ops, _inline_cache_entries, _specializations, _specialized_instructions

t-wy

Challenge Name - MIXED

URL - https://capturetheflag.withgoogle.com/challenges/rev-mixed

Description - A company I interview for gave me a test to solve. I'd decompile it and get the answer that way, but they seem to use some custom Python version... At least I know it's based on commit 64113a4ba801126028505c50a7383f3e9df29573.

Attachments:

• patch (See A1: patch)
• x.pyc (See A2: x.pyc.b64)

t-wy

javascript: fbid = /share_fbid":"(\d+)"/g.exec([...document.getElementsByTagName("script")].filter(x => x.innerHTML.includes("share_fbid"))[0].innerHTML)[1]; alert(location.href.split("/").slice(0, -1).join("/") + "/" + fbid);

// can be used in console / bookmark / address bar (remember to add back javascript if the browser strips it automatically)

t-wy

def messagepack_csharp_unpack(data: bytes) -> list:
    """
    Redistribution Notice:
    Properly attribute all entities listed below and request others to follow the same.
    Otherwise, DO NOT remove or modify this comment.
    Specification (MessagePack for C#):
    https://github.com/MessagePack-CSharp/MessagePack-CSharp
    Dependencies:
    msgpack: https://github.com/msgpack/msgpack-python
    lz4: https://github.com/python-lz4/python-lz4

t-wy

# Based on https://github.com/Cysharp/MemoryPack/blob/main/sandbox/SandboxWebApp/wwwroot/js/memorypack/MemoryPackReader.ts
# Implementation by @t-wy: https://github.com/t-wy

from typing import *
from .byte_reader import LittleEndianReader
from dataclasses import is_dataclass
from datetime import datetime

def deserialize(_type, content: bytes):
    reader = LittleEndianReader(content)