摘要：
Cows are such finicky eaters. Each cow has a preference for certain foods and drinks, and she will consume no others. Farmer John has cooked fabulous 阅读全文
摘要：
You are given N processors and M jobs to be processed. Two processors are specified to each job. To process the job, the job should be allocated to an 阅读全文
摘要：
我太难了，被两道最大流困住了， 我知道思路，代码也写出来了，也过了样例啊， 但是一直报错，超时啊，RT啊，wa啊，哪错了啊啊 两道题我写了七八个小时，唉，我好菜。 那两题之后再补叭，先空着。 任何数和0异或是该数本身：x^0=x 做到和平行四边行相关的问题的时候，应该联想到：平行四边形的对角线是角平 阅读全文