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Message queue is the basic fundamental of windows system. For each process, the system maintains a message queue. If something happens to this process 阅读全文
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There is a famous railway station in PopPush City. Country there is incredibly hilly. The station was built in last century. Unfortunately, funds were 阅读全文
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As the new term comes, the Ignatius Train Station is very busy nowadays. A lot of student want to get back to school by train(because the trains in th 阅读全文
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You are given string s consists of opening and closing brackets of four kinds , {}, [], (). There are two types of brackets: opening and closing. You 阅读全文
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看病要排队这个是地球人都知道的常识。 不过经过细心的0068的观察，他发现了医院里排队还是有讲究的。0068所去的医院有三个医生（汗，这么少）同时看病。而看病的人病情有轻重，所以不能根据简单的先来先服务的原则。所以医院对每种病情规定了10种不同的优先级。级别为10的优先权最高，级别为1的优先权最低。 阅读全文