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20/12/2024 13:13:18
Занятие 5 (подготовка к олимпиаде)
D. Secret Research
Задачи на идеюРазбор случаев
Олимпиадные задачи на английском языке
| 04/10/2002 | Личное первенство университета по программированию (4) |
| 10/10/2007 | Занятие 5 (задачи личного первенства 2002г) (D) |
Ограничения: время – 1s/2s, память – 32MiB Ввод: input.txt или стандартный ввод Вывод: output.txt или стандартный вывод 
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At a certain laboratory results of secret research are thoroughly encrypted. A result of a single experiment is stored as an information of its completion: 'positive result', 'negative result', 'experiment failed' or 'experiment not completed'.
The encrypted result constitutes a string of digits S, which may take one of the following forms:
- positive result S = 1 or S = 23 or S = 2S3
- negative result S = 51S
- experiment failed S = 5S
- experiment not completed S = 2S1 or S = 24S
(A sample result 51S means that if we add digits 51 from the left hand side to a digit sequence then we shall get the digit sequence corresponding to a failed experiment)
You are to write a program which decrypts given sequences of digits.
Input
A integer `n` stating the number of encrypted results and then consecutive `n` lines, each containing a sequence of digits given as ASCII strings.
Output
For each analysed sequence of digits the following lines should be sent to output (in separate lines):
| + | for a positive result |
| - | for a negative result |
| * | for a failed experiment |
| ? | for a not completed experiment |
Sample Input
4 23 5123 222331 523
Sample Output
+ - ? *
