Задания шестой недели курса CS50 на Python (Bleep, Hello, Caesar, Cash, Mario, Vigenere)

import cs50

def main():
    while True:
        print("Height: ", end = "")
        height = cs50.get_int()
        if height >=1 and height <= 8:
            break

    for i in range(height):
        for j in range(height - i - 1):
            print(" ", end = "")
        for k in range(i+1):
            print("#", end = "")
        print("")

if __name__ == "__main__":
    main()

import cs50

def main():
    while True:
        print("Height: ", end = "")
        height = cs50.get_int()
        j = height
        if height >=1 and height <= 8:
            break

    for i in range(1, height + 1):
        hashes = i
        spaces = j - hashes

        print(" " * spaces, end="")
        print("#" * hashes, end="")

        print("  ", end="")

        print("#" * hashes)

if __name__ == "__main__":
    main()

import sys
from cs50 import get_string


def main():
    if len(sys.argv) != 2:
        print("Usage: ./caesar k")
        sys.exit(1)

    k = int(sys.argv[1])
    plaintext = get_string("plaintext: ")

    print("ciphertext: ", end="")

    for ch in plaintext:
        if not ch.isalpha():
            print(ch, end="")
            continue

        ascii_offset = 65 if ch.isupper() else 97

        pi = ord(ch) - ascii_offset
        ci = (pi + k) % 26

        print(chr(ci + ascii_offset), end="")

    print()

    return 0


if __name__ == "__main__":
    main()

import sys
from cs50 import get_string

def is_valid(k):
    for ch in k:
        if not ch.isalpha():
            return False
    return True


def main():
    if len(sys.argv) != 2 or not is_valid(sys.argv[1]):
        print("Usage: python vigenere.py k")
        sys.exit(1)

    k = sys.argv[1]
    plaintext = get_string("plaintext: ")
    j = 0

    print("ciphertext: ", end="")

    for ch in plaintext:
        if not ch.isalpha():
            print(ch, end="")
            continue

        ascii_offset = 65 if ch.isupper() else 97

        pi = ord(ch) - ascii_offset
        kj = ord(k[j % len(k)].upper()) - 65
        ci = (pi + kj) % 26
        j += 1

        print(chr(ci + ascii_offset), end="")

    print()

    return 0

if __name__ == "__main__":
    main()

from cs50 import get_float
from math import floor

def main():
    while True:
        dollars_owed = get_float("Change owed: ")
        cents_owed = floor(dollars_owed * 100)

        if cents_owed > 0:
            break

    quarters = cents_owed // 25
    dimes = (cents_owed % 25) // 10
    nickels = ((cents_owed % 25) % 10) // 5
    pennies = ((cents_owed % 25) % 10) % 5

    print(f"{quarters + dimes + nickels + pennies}")

if __name__ == "__main__":
    main()

from cs50 import get_int
from math import floor

def main():
    digit1 = 0
    digit2 = 0
    num_digits = 0
    sum_of_double_odds = 0
    sum_of_evens = 0
    cc_number = get_int("Number: ")

    while cc_number > 0:
        digit2 = digit1
        digit1 = cc_number % 10

        if num_digits % 2 == 0:
            sum_of_evens += digit1
        else:
            multiple = 2 * digit1
            sum_of_double_odds += (multiple // 10) + (multiple % 10)

        cc_number //= 10
        num_digits += 1

    is_valid = (sum_of_evens + sum_of_double_odds) % 10 == 0
    first_two_digits = (digit1 * 10) + digit2

    if digit1 == 4 and num_digits >= 13 and num_digits <= 16 and is_valid:
        print("VISA\n")
    elif first_two_digits >= 51 and first_two_digits <= 55 and num_digits == 16 and is_valid:
        print("MASTERCARD\n")
    elif (first_two_digits == 34 or first_two_digits == 37) and num_digits == 15 and is_valid:
        print("AMEX\n")
    else:
        print("INVALID\n")

if __name__ == "__main__":
    main()

import sys
import crypt

def main():
    if len(sys.argv) != 2:
        print("Usage: crack <hash>")
        sys.exit(1)

    ahash = sys.argv[1]
    salt = ahash[0:2]
    letters = " abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"

    for fifth in letters:
        for fourth in letters:
            for third in letters:
                for second in letters:
                    for first in letters[1:]:
                        candidate = f"{first}{second}{third}{fourth}{fifth}".strip()

                        if crypt.crypt(candidate, salt) == ahash:
                            print(candidate)
                            sys.exit(0)

if __name__ == "__main__":
    main()

from cs50 import get_string
from sys import argv

while True:
    if len(argv) == 2:
        f = open(argv[1], "r")
        break
    else:
        print("Useage: python bleep.py dictionary")
        exit(1)

if f.mode == 'r':
    contents = f.read()

message = input("What message would you like to censor?\n")
words = message.split(" ")

for word in words:
    low_word = word.lower()
    length = len(word)
    if low_word in contents:
        print(length*"*", end=" ")
    else:
        print(word, end=" ")
print()