随笔分类 -  树状数组

[POJ 2155] Matrix
摘要：Description Given an N*N matrix A, whose elements are either 0 or 1. A[i, j] means the number in the i-th row and j-th column. Initially we have A[i, 阅读全文
posted @ 2017-09-03 22:40 HLX_Y 阅读(183) 评论(0) 推荐(0)