摘要:
此题的关键在于给你的位置的分布, 可以发现是交错的,那么就可以用二分图了。National TreasuresTime Limit: 2000/1000 MS (Java/Others)Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 854Accepted Submission(s): 281Problem DescriptionThe great hall of the national museum has been robbed few times recently. Everyone is now worrie 阅读全文
摘要:
此题可有对角线都是1的方阵进行 行变换或列变换 得到。 如果这样想就可以知道, 每行只选一个列,要把所有的列全部选完, 而且最后只需进行行变换就可以转变成对角线全为一SwapTime Limit: 2000/1000 MS (Java/Others)Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 892Accepted Submission(s): 283Special JudgeProblem DescriptionGiven an N*N matrix with each entry equal to 0 or 1 阅读全文