1110 Complete Binary Tree （25 分） Given a tree, you are supposed to tell ...

1081 Rational Sum （20 分） Given N rational numbers in the form numerator/...

1055 The World's Richest （25 分） Forbes magazine publishes every year its...

1060 Are They Equal （25 分） If a machine can save only 3 significant digi...

1063 Set Similarity （25 分） Given two sets of integers, the similarity of...

1071 Speech Patterns （25 分） People often have a preference among synonym...

1061 Dating （20 分） Sherlock Holmes received a note with some strange str...

1059 Prime Factors （25 分） Given any positive integer N, you are supposed...

1102 Invert a Binary Tree （25 分） The following is from Max Howell @twitt...