NOI 2023 回忆 最后更新于 2025-05-01 16:40:50

# NOI 2023 回忆 本来不打算写的，结果看大家都写了，就决定也写一篇，虽然我写的是流水账。 ### 成就列表 * 拿到 Au (125/51) * 拿到前100 (125/100) * 拿到 Ag （125/200） * 换完全部50个徽章 （50/50） * 拿到 zky 和 csy 的徽章（2/2） * 拿到 5 个女队的徽章 (1/5) * 赢一局三国杀 （没玩） * HE rk1 （2/1） * 找杜子德要签名 (0/1) * 带着热爱结束OI生涯 （1/1） ### day-2 坐了5个小时大巴从重庆到成都，后面坐的是R和lj，路上背了大概15min笔试，然后睡觉，发现R和lj睡着之后就看知乎+听歌。没有发生什么有意思的事，也没有干坐着什么都不干。 到了之后领了 NOI 大礼包，从牛老师那里领了徽章并和HE的小伙伴们换了一遍。 把认识的人的徽章都换了一遍。并成功换到了zky，csy，Alex_Wei，王茂骅的徽章。我从小就是看王茂骅的超脑少年团长大的，能换到偶像的徽章很令人愉快。 NOI大礼包里有个熊猫挂饰，但不知道为什么耳朵那么长，如果短一点就好了。不过不管怎么说，木木枭都结识到了新朋友。 想到要找女队换徽章，所以要提前组织一下语言，于是就有了下面这句奇怪的话： "这位美丽而优雅的女士，请问您是否有徽章愿与小生一换"。（实践的时候太紧张，把小生说成了阁下，又要被嘲笑语文不好了，注：阁下是对对方的尊称） 然后她徽章已经换完了，就没换成。 晚饭后玩了会儿桌上足球。 补充一下：见到了长头发的姚子奇，但是没有合影。 ### day-1 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$\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare$ $\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare$ $\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare$ $\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare\blacksquare$ （有被涂改的痕迹） 音乐厅出口处的熊猫玩偶好可爱，好想rua.  下午试机+笔试，总之笔试满分了，并得知NOI下发了一种新的调错程序。 晚上，随便打了几个板子保持手感，听说有 EI 出题，但多项式可能性不大，怀疑要用到 binomial sum 科技，就复习了一下，然后就跟 ace 一起看B站csgo的直播。 ### day1 上来看了眼 $T1$ ，可以直接离散化后合并线段再二位数点，然后对于斜线可以直接暴力，40min写完，然后开始推 $T2$ dp，推了个 $O(t3^km)$ 的做法，然后假了，推了个 $O(tmB(k))$ 的做法，也假了。 这时候只剩下一个多小时了，然后放弃正解，显然答案与树的形态无关，推出一个一行的式子得到 60 分，第 1,2 个点不想写就没写。然后 $T3$ 把最基础的暴力和链的 $n^2$ 写了，之后 32 分，最后还剩10分钟的时候发现其实链可以 $nlog_2n$ 做，并且 $k \leq 8$ 可以容斥，尝试冲 $k \leq 8$ ，然后没写完。出考场发现 HE 好像都挺低的，只有ice_cup 一个人上200。 下午查分确实是100 + 60 + 32 = 192. 有很多能拿的分没拿，还是挺遗憾的。 没提到的时间都在摆。 ### day1.5 玩嘉年华，过了飞盘，盲人敲锣，飞盘，射箭。射箭有一个命中10环，奖品是钥匙扣，我选择了四条腿走路的那个熊猫。 下午和fls，xfy，ace稍微打了会儿tetr.io. 晚上想出去走走，刚走到操场就下起了巨大的雨，回宿舍之后感觉头有点热。 没提到的时间都在摆。 ### day2 一觉醒来头不热了，很好。 比赛开始，两个小时才写完 $T1$, 有点浪费时间。 $T2$ 不会正解拼出了28到44分暴力，$T3$ 写个状压dp就有30分。 下午差分的时候 $T2$ 有40分，一共100+40+30 = 170. 三天总分 462. 第 125 名。 恭喜牛老师 5 + 100 + 186 + 174 = 465 获得 HE rk1. 闭幕式的时候带木木枭认识了一下音乐厅出口处的熊猫玩偶。 后面发生的事情就都不记得了. 恭喜KH获得第51名的好成绩，荣获新时代粉兔称号。 比赛结束之后就各奔东西了，也不知道以后能不能和大家再见面，还有些想做的事没有去做，还有些想说的话没有去说，那就把这一切尘封在记忆里吧。