import os
import sys
from pathlib import Path

CONFIG_FILE = Path(os.path.join(os.environ['XDG_CONFIG_HOME'] if 'XDG_CONFIG_HOME' in os.environ else f"{os.environ['HOME']}/.config", 'codeforces', 'config.json'))
SESSION_FILE = Path(os.path.join(os.environ['XDG_STATE_HOME'] if 'XDG_STATE_HOME' in os.environ else f"{os.environ['HOME']}/.local/state", 'codeforces', 'session.json'))


def get_int(options: list[str]) -> int:
    while True:
        try:
            print('\n'.join(options))
            num = int(input("Enter a number: "))
            assert num <= len(options)
            assert num >= 0
            return num
        except Exception:
            print("Invalid input!\n", file=sys.stderr)