摘要:        
http://acm.hnu.cn/online/?action=problem&type=show&id=12484&courseid=0Unique Encryption KeysTime Limit: 30000ms, Special Time Limit:75000ms, Memory Limit:65536KBTotal submit users: 19, Accepted users: 15Problem 12484 : Special judgeProblem descriptionThe security of many ciphers strongly    
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