摘要：Problem Description Once upon a time Matt went to a small town. The town was so small and narrow that he can regard the town as a pivot. There were so 阅读全文

摘要：Given a m-by-n (0,1)-matrix, of all its submatrices of all 1’s which is the largest? By largest we mean that the submatrix has the mos... 阅读全文

摘要：Bill is developing a new mathematical theory for human emotions. His recent investigations are dedicated to studying how good or bad d... 阅读全文

摘要：A histogram is a polygon composed of a sequence of rectangles aligned at a common base line. The rectangles have equal widths but may ... 阅读全文