大概是赛前一个月，我得知本次 EC Final 还会办一场华为挑战赛。不过我发现 DOMJudge 并不能支持华为...
三个人搞到294分钟才签完签到题，另一队友说不如等到299分钟交拿顽强拼搏奖。
为了简洁处理,又加了区间端点互不相同的限制。晚上躺在床上的时候,思维随机发散,想到了独立集。但当时有点太发散了,意识到是独立集之后也没会做,有点纠结独立集结论的正确性。第二天起床,立马意识到了这是一张二分图,又简单证了一下独立集的结论,就投给杜老师了。 其实后面还出了一个题,我自己感觉非常深刻...
1≤s≤n≤5×103,−109≤wi≤109,0≤pi≤109,1≤ai≤n,ai≠i。 很炫酷的题。 整个图的结构是基环树。不妨假设s在环上,考虑变换,一定是环上连续一段0一段1变换,然后随着环上01变换,每次染到环上某个点时都可以往子树内然一段,于是子树里也会变成01分层的情况。 子树里如果01分成了最多k次,那么...
The 11th Stage of the 1st Universal Cup is coming. It will be held from April 8th to 9th. It is also a replay of the 2022 ICPC East Continent Final Contest, which was held on March 24, 2023 — March 26, 2023. As usual, we have three time windows for participating. You can ...
Hello Codeforces! The 11th Stage of the 1st Universal Cup is coming. It will be held from April 8th to 9th. It is also a replay for the 2022 ICPC East Continent Final Contest, which was held on March 24, 2023 — March 26, 2023. ...
UEFA.com lists the starting XIs for both the UEFA Champions League semi-final second legs. Manchester City's Kevin De Bruyne trains on Tuesday Getty Images UEFA.com gives Fantasy Football managers a helping hand by listing and predicting all the UEFA Champions Lea...
Lionel Messi (2nd L) of Argentina vies with Jorginho (2nd R) of Italy during the Finalissima 2022 match between Italy and Argentina in London, Britain, June 1, 2022. (Photo by Pablo Morano/Xinhua) Lautaro Martinez (Front) of Argentina controls the ball during the Finalissima 2022 match ...
The WTO Panel on the EC-Biotech Dispute Releases Its Final ReportSungjoon Cho
DOHA, April 1 (Xinhua) -- The Final Draw for the 2022 FIFA World Cup Qatar was held here on Friday. Following are the results with seeds in the first spot in each group: Group A: Qatar, Ecuador, Senegal, Netherlands; Group B: England, Iran, the United States, European Playoff winner...