https://blog.youkuaiyun.com/VecSunzh-cnhttps://blog.youkuaiyun.com/https://blog.youkuaiyun.com/VecSun/article/details/77387728https://blog.youkuaiyun.com/VecSun/article/details/77387728VecSunFri, 18 Aug 2017 21:26:32 +0800https://blog.youkuaiyun.com/VecSun/article/details/74999993https://blog.youkuaiyun.com/VecSun/article/details/74999993VecSunTue, 11 Jul 2017 22:45:18 +0800https://blog.youkuaiyun.com/VecSun/article/details/71897307https://blog.youkuaiyun.com/VecSun/article/details/71897307VecSunSat, 13 May 2017 20:44:29 +0800https://blog.youkuaiyun.com/VecSun/article/details/53020588https://blog.youkuaiyun.com/VecSun/article/details/53020588VecSunThu, 03 Nov 2016 13:32:25 +0800https://blog.youkuaiyun.com/VecSun/article/details/52808502https://blog.youkuaiyun.com/VecSun/article/details/52808502VecSunThu, 13 Oct 2016 17:31:35 +0800https://blog.youkuaiyun.com/VecSun/article/details/52791029https://blog.youkuaiyun.com/VecSun/article/details/52791029VecSunTue, 11 Oct 2016 19:47:02 +0800v存在一条路径经过的点数为偶数(边可以重复走，点也重复记)。 思路：xjb画一下就会发现，对于一个二分图的答案数就是两部分点数的乘积，其他连通图的任意两点都是可以xjb走出一条这样的路径。那么这个题就变成了维护二分图的信息了，按照叉姐给的思路用个并查集xjb维护一下。开始以为如果分成多个联]]>https://blog.youkuaiyun.com/VecSun/article/details/49428229https://blog.youkuaiyun.com/VecSun/article/details/49428229VecSunMon, 26 Oct 2015 18:57:16 +0800https://blog.youkuaiyun.com/VecSun/article/details/49384341https://blog.youkuaiyun.com/VecSun/article/details/49384341VecSunSat, 24 Oct 2015 13:13:19 +0800https://blog.youkuaiyun.com/VecSun/article/details/48938777https://blog.youkuaiyun.com/VecSun/article/details/48938777VecSunTue, 06 Oct 2015 23:27:17 +0800