大模拟：
1》saygoodbye要先对 always on top 的人说 2》对没有说过话的不要说good bye 3》用long long
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Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 262144/262144 K (Java/Others)Total Submission(s): 337 Accepted Submission(s): 82
Problem Description As everyone knows, DRD has no girlfriends. But as everyone also knows, DRD’s friend ATM’s friend CLJ has many potential girlfriends. One evidence is CLJ’s chatting record.
CLJ chats with many girls all the time. Sometimes he begins a new conversation and sometimes he ends a conversation. Sometimes he chats with the girl whZ??http://www.2cto.com/kf/ware/vc/" target="_blank" class="keylink">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