摘要：
Problem A common substring of a collection of strings is a substring of every member of the collection. We say that a common substring is a longest co 阅读全文
摘要：
Problem For a random variable XX taking integer values between 1 and nn, the expected value of XX is E(X)=∑nk=1k×Pr(X=k)E(X)=∑k=1nk×Pr(X=k). The expec 阅读全文
摘要：
Problem A graph whose nodes have all been labeled can be represented by an adjacency list, in which each row of the list contains the two node labels 阅读全文