nexthexonextbutterflyvolantisyearnyiliashokaindigoapollolandscapecactusmateryicarusfluidmaterial 霍尔定理推论: 对于一个二分图G<V,E>，若点可以分为两部分N和M,N内部没有边，M同理，S’是N的某个子集(可以为空),f(S’)是与该子集相邻的点集,则他的最大匹配为|N|-m...

nexthexonextbutterflyvolantisyearnyiliashokaindigoapollolandscapecactusmateryicarusfluidmaterial ###nameRoundgod and Milk Tea ###decriptionRoundgod is a famous milk tea lover at Nanjing University...

nexthexonextbutterflyvolantisyearnyiliashokaindigoapollolandscapecactusmateryicarusfluidmaterial nameRikka with Phi decriptionRikka and Yuta are interested in Phi function (which is known as Euler...

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nexthexonextbutterflyvolantisyearnyiliashokaindigoapollolandscapecactusmateryicarusfluidmaterial 1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253...

nexthexonextbutterflyvolantisyearnyiliashokaindigoapollolandscapecactusmateryicarusfluidmaterial ###nameBracket Sequences on Tree ###decriptionCuber QQ knows about DFS on an undirected tree, he’s ...

nexthexonextbutterflyvolantisyearnyiliashokaindigoapollolandscapecactusmateryicarusfluidmaterial nameThis Problem Is Too Simple！ description给您一颗树，每个节点有个初始值。现在支持以下两种操作： C i x(0<=x<2^31)...

nexthexonextbutterflyvolantisyearnyiliashokaindigoapollolandscapecactusmateryicarusfluidmaterial ###nameTransformation ###descriptionYuanfang is puzzled with the question below:There are n integer...

nexthexonextbutterflyvolantisyearnyiliashokaindigoapollolandscapecactusmateryicarusfluidmaterial ###name决战圆锥曲线 ###descirption数学考试，一道圆锥曲线的题难住了你，你开始疯狂地笔算。但是，这题实在太难，于是你决定每种思路多尝试尝试。 你的思维过程可以转化为如下过程：有...

nexthexonextbutterflyvolantisyearnyiliashokaindigoapollolandscapecactusmateryicarusfluidmaterial ###name双面棋盘 ###descirption佳佳有一个 n 行 n 列的黑白棋盘，每个格子都有两面，一面白色，一面黑色。佳佳把棋盘平放在桌子上，因此每个格子恰好一面朝上，如下图所示：我们把每...