class LogLevel:
    DEBUG = 0
    WARNING = 1
    ERROR = 2
    CRITICAL = 3

log_lvl = LogLevel.CRITICAL


def set_lvl(lvl):
    global log_lvl
    if lvl < LogLevel.DEBUG:
        lvl = LogLevel.DEBUG
    if lvl > LogLevel.CRITICAL:
        lvl = LogLevel.CRITICAL
    
    log_lvl = lvl


def debug(message):
    global log_lvl
    if log_lvl <= LogLevel.DEBUG:
        print(message)

def warning(message):
    global log_lvl
    if log_lvl <= LogLevel.WARNING:
        print(message)

def error(message):
    global log_lvl
    if log_lvl <= LogLevel.ERROR:
        print(message)

def critical(message):
    global log_lvl
    if log_lvl <= LogLevel.CRITICAL:
        print(message)