#!/usr/bin/python3
# -*- coding: utf-8 -*-

print("You have to run this program, once for every character of your message")

key: int = int(input("\nEnter your Caesar key in numeric form (1-25): "))

mode: int = int(input("\nEnter 1 for encryption, and 0 for decryption: "))

encoded_char: int = int(
    input(
        "\nEnter Caesar encoded number corresponding to one character of your message:"
    )
)

print("\nThe translation of your character is:")

if mode == 1:
    # 26 is the symbol set size (# letters in alphabet)
    # negative mod is language dependent in behavior
    print((encoded_char + key) % 26)
else:
    print((encoded_char - key) % 26)