摘要：
Given a sequence of integers, a1, a2,..., an , we define its sign matrix S such that, for 1ijn , Sij = `` + "if Sij = `` - " if ai +...+ aj #incl... 阅读全文
摘要：
Walk Through Squares Time Limit: 4000/2000 MS (Java/Others) Memory Limit: 65535/65535 K (Java/Others) Total Submission(s): 1136 Accepted Sub... 阅读全文