摘要：D. Babaei and Birthday Cake time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output As you know, 阅读全文

摘要：背景 小杉的幻想来到了经典日剧《求婚大作战》的场景里……他正在婚礼上看幻灯片，一边看着可爱的新娘长泽雅美，一边想，如果能再来一次就好了（-.-干嘛幻想这么郁闷的场景……）。 小杉身为新一代的山下智久，在虔诚地在心里呼喊了几千次以后，妖精终于出现了。 妖精说，我还是可以帮你回到这张照片的过去，让你再来 阅读全文

摘要：C. Graph and String time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output One day student Vasy 阅读全文

摘要：Clarke and MST Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 315 Accepted Submission(s): 176 Pr 阅读全文

摘要：A. Bulbs time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Vasya wants to turn on Christmas 阅读全文

摘要：http://codeforces.com/contest/621 A. Wet Shark and Odd and Even time limit per test 2 seconds memory limit per test 256 megabytes input standard input 阅读全文