摘要：B. Rebrandingtime limit per test2 secondsmemory limit per test256 megabytesinputstandard inputoutputstandard outputThe name of one small but proud cor... 阅读全文

摘要：C. Duff and Weight Liftingtime limit per test1 secondmemory limit per test256 megabytesinputstandard inputoutputstandard outputRecently, Duff has been... 阅读全文

摘要：DescriptionThink about a plane:● One straight line can divide a plane into two regions.● Two lines can divide a plane into at most four regions.● Thre... 阅读全文

摘要：UsoperantoUsoperanto is an artificial spoken language designed and regulated by Usoperanto Academy. The academy is now in study to establish Strict Us... 阅读全文

摘要：frog hasnintegersa1,a2,…,an, and she wants to add them pairwise.Unfortunately, frog is somehow afraid of carries (进位). She defines \emph{hardness}h(x,... 阅读全文