def get_input():
    result = []
    print('Enter a number when prompted. Press enter to stop')
    while True:
        _input = input('Input a number: ')
        if len(_input) == 0:
            break
        try:
            _input = int(_input)
            result.append(_input)
        except ValueError:
            print("Error, only accepts numbers")
    return result

print(min(get_input()))