[codeforces]gym #100339(ASC23) Virtual participation - fsygd's Blog
[codeforces]gym #100339(ASC23) Virtual participation
@ruchiose说要打gym，就和@zyh，@wangtao组队。我和@xllend3，@zcc，@Shi一起组成了一个爆OJ的小团体（后来还有@sy2006倾情加盟），于是就被主力约完爆了。
0:12 E -1 by @zcc
爆OJ！
0:15 I 1A by @fsygd
求有几个长为n的序列的和与积相等。杜教说不为1的数最多只有logn个，于是我就直接n^2logn的暴力DP了。
0:28 G -1 by @xllend3
爆OJ！
0:29 G -2 by @xllend3
爆OJ！！
0:34 E -2 by @zcc
爆OJ！！
0:35 G -3 by @xllend3
爆OJ！！！
0:40 E -3 by @zcc
爆OJ！！！
0:40 G -4 by @xllend3
爆OJ！！！！
0:44 G -5 by @xllend3
爆OJ！！！！！
0:49 E -4 by @zcc
爆OJ！！！！
1:01 F -1 by @sy2006
大牛哥加入了我们的行列，做了一道语文题。。
1:07 E -5 by @fsygd
把线段树的n+1打成了n。。
1:12 E 6A by @fsygd
隔壁的约大爷已经快3题了。。
1:15 G 6A by @xllend3
好像是改掉了一个sb错误。。
1:24 H -1 by @Shi
E题被A掉了，@zcc找到了一道新题来做(bao)
1:34 F -2 by @sy2006
大牛哥也开始爆OJ了
1:36 F -3 by @sy2006
大牛哥一路前行
1:39 F 4A by @sy2006
biu！大牛哥A掉了！！！我们永远是A题数一样的team中的倒一。。
1:53 B 1A by @fsygd
维护一个子树中有没有超过一条边连到子树外面去。我们只要先做出Dfs序，然后用树形DP维护出子树中连出去的边的另一端点的Dfs序最大值、次大值、最小值、次小值。
1:57 H -2 by @zcc
@zcc修复了一个小bug
2:04 H 3A by @zcc
@zcc修复了一个大bug
2:22 A -1 by @xllend3
一道三分套三分，但是好像被卡精度了。。
2:28 A -2 by @xllend3
好像又不是精度的问题，三分套三分被写成一个log的了。。
2:44 A 3A by @xllend3
三分题终于A掉了。。隔壁的约大爷已经7题了。。
3:09 J -1 by @fsygd
J题是给定两个图像是折线的函数f(x),g(x)，求出g(f(x))，并尽量合并。
我的做法是，把f(x)的每段值域，作为g(x)的定义域，并求出所有的折点，最后把所有的斜率相同的折线合并。
3:15 J -2 by @fsygd
我把eps改成1e-8还是WA on test 13
3:16 J -3 by @fsygd
我把eps改成1e-6后多过了两个点，用红名号看了下一共只有18个点，这让我有了些信心。
3:19 J -4 by @fsygd
大家都去吃饭了，机房只剩下我和@zyh单挑J题。。
3:20 J -5 by @fsygd
发现再改小eps就WA on test 9了
3:22 J -6 by @fsygd
WA得意识模糊
3:28 J 7A by @fsygd
改大了inf，总算A掉了
难得打gym能当一发主力，真是太累了。。最后能有#6也是不错的结果了吧。。
再过几天就要退役了。。gym已经打一场少一场了。。马上就要去写OJ了。。
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