nan + nan = 2nan

코드 입력 test = input() list_cro = ['c=', 'c-', 'd-', 'lj', 'nj', 's=', 'z='] cnt = 0 while True: if len(test) >= 4: if test[:3] == 'dz=': cnt += 1 test = test[3:] elif test[:2] in list_cro: cnt += 1 test = test[2:] else: cnt += 1 test = test[1:] elif len(test) == 3: if test == 'dz=': cnt += 1 break elif test[:2] in list_cro: cnt += 1 test = test[2:] else: cnt += 1 test = test[1:] elif len(test) ==..