import zipfile  
import os  
  
def unzip_and_delete_all_in_directory(directory, dest_path):  
    try:  
        for filename in os.listdir(directory):  
            file_path = os.path.join(directory, filename)   
            if zipfile.is_zipfile(file_path):  
                with zipfile.ZipFile(file_path, 'r') as zip_ref:  
                    zip_ref.extractall(dest_path)  
                os.remove(file_path)  
                print(f"{file_path} has been unzipped and deleted successfully.")  
    except Exception as e:  
        print(f"An error occurred: {e}")  
  
for i in range(5000):
	unzip_and_delete_all_in_directory('./', './')

DASCTF{10c58258ccf1e7c631e5911ed6acc4ed}

import matplotlib.pyplot as plt
import numpy as np

def display_character(dot_matrix, filename):

    plt.imshow(dot_matrix, cmap='Greys', interpolation='nearest')
    plt.axis('off')
    plt.savefig(filename, bbox_inches='tight', pad_inches=0)
    plt.close()

def parse_dot_matrix(cipher_line):

    row_values = [int(val) for val in cipher_line.split(',')]
    
    dot_matrix = [list(bin(row)[2:].zfill(16)) for row in row_values]
    
    dot_matrix = np.array(dot_matrix).astype(int)
    
    return dot_matrix

with open('C:/Users/miaoaixuan/Desktop/cipher.txt', 'r', encoding='utf-8') as file:
    cipher_text = file.read()

cipher_lines = cipher_text.split('\n')[1:] 

num_characters_to_display = 100
for i in range(num_characters_to_display):
    dot_matrix = parse_dot_matrix(cipher_lines[i])
    filename = f'C:/Users/miaoaixuan/Desktop/tpg/character_{i + 1}.png'
    display_character(dot_matrix, filename)

from PIL import Image
import matplotlib.pyplot as plt

def draw(dot_matrix_str):
    i2 = Image.new("RGB", (16, 16))
    _ind = 0
    for h in range(16):
        for w in range(16):
            x = dot_matrix_str[_ind]
            if x == '0':
                i2.putpixel((w, h), (0, 0, 0)) 
            else:
                i2.putpixel((w, h), (255, 255, 255)) 
            _ind += 1
    return i2

filename = r'c:\Users\miaoaixuan\Desktop\hint.txt'  
with open(filename, 'r', encoding='utf-8') as file:
    dot_matrix_data = [line for line in file.read().split('\n') if len(line) == 256]

for i in range(len(dot_matrix_data)):
    dot_matrix_str = dot_matrix_data[i]
    img = draw(dot_matrix_str)

    plt.imshow(img)
    plt.axis('off')
    plt.show()

    img.save(f"c:/Users/miaoaixuan/Desktop/HINT/character_{i + 1}.png")