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====== 2023暑假第二场加训 ======
[[https://codeforces.com/group/mjyX90X3J8/contest/465213|比赛链接]]
===== 赛时记录 =====
0-30min，my 19min 过L, 30min过G \\
30min-1h30min，1h15min my写了一发E过了，1h35min my写了一发F过了\\
1h30min-2h fks和ljz开始想K,my写A,A写了1h\\
2h-3h my继续写A,写完发现有点问题，开始肉眼de和思考，fks开始写K，乐子人写了个假做法，写完线段树分治发现做法假了，于是从头开始想\\
3h-4h my继续写 写完发现过了，fks也继续写，改完也过了，然后my觉得C很一眼，于是开始写圆方树（这其实是假做法）,我们觉得H比较2-sat但过的人很少，觉得一定有鬼，于是大家都觉得先把C写了比较好\\
4h-4h30min fks和ljz讨论出了M的做法，但my那题在那时候看起来很有希望，而且M的构造可能写起来有点细节，于是机子让给了my\\
4h30min-5h my wa on 34，构造假了，他开始修边边角角，然后决定放下M全力冲C\\
===== 总结 =====
又是卡题的一天。但fks和ljz也没想出比较简洁的M的写法，两个人代码能力比较弱没有短时间内写完的能力。
my想了假做法，应该在写之前再多细想一下可能会更好
===== Dirt =====
K(-1):没开long long