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Meow
===== C =====
Red:
枚举总长度和两部分长度，然后解不定方程。
Dirty: 无
===== D =====
Red:
博弈，基本只需要考虑中间有且某侧只有一个的层。
Dirty: 计数计错了，然后把自己绕进去又思考半天。
===== L =====
Red:
不存在情况显然。发现映射 min(r+x,g+y,b+z) 在 xyz = 0 时满足映射要求，故只需要调参使前俩相等。
Dirty: 调参没调好。
===== M =====
Red:
签到。暴力枚举每一位插入。
Dirty: 忘了 0
===== K =====
yuki：
笨蛋签到题。
Dirty：终于没有 Dirty 了
====== 场上没过的题 ======
===== F =====
Red:
他们究竟怎么想的才会对过题也压位维护（）
===== J =====
这题究竟是为什么没过呢（）