| |||
| 组合问题 | |||
|
combinatorial problem : 4 phrases in 4 subjects |
| Cryptography | 1 |
| Electronics | 1 |
| Information technology | 1 |
| Programming | 1 |
| |||
| 组合问题 | |||
|
combinatorial problem : 4 phrases in 4 subjects |
| Cryptography | 1 |
| Electronics | 1 |
| Information technology | 1 |
| Programming | 1 |