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Happy coding
停课日志
leaf
posted @ 2014年5月15日 20:04
in 未分类
, 1211 阅读
这几天一天不如一天，rating做一场跌一场，该写写回忆录。。
[CQOI]
被和谐矩阵一题ken
5月16日
今天考HNOIday2，第一题，只会N方枚举，然后O(n)验证，我写着写着，发现要写KMP和AC自动机，直接放弃了写暴力了。。第二题暴力。第三题，一开始SG没想清楚，脑补了一下取石子游戏，然后有重写了一个。结果还是biubiu了。后来发现清0是j达成i了，然后写了70分暴力。然后发现有很多状态时多余的，只需sqrt(n)枚举即可。写完后，我FC，一开始以为对了，暴了几发OJ，wrong了，后来定睛一看，是“找不到文件”，而非“找不到差异”，顿时囧了。。暴力被删了，只得重写了一个，然后，然后稳稳的滚粗了。。biubiu！
5月17日
今天SHTSC2014day1彻底萎穿了,为什么大家这么强？为是么我这么弱？第一题大意是求最小椭圆覆盖，我不会椭圆，觉得完全不可做，暴力都写不出！ 后来ZCC A了，告诉我不用椭圆的知识。我顿时有了信心，仔细思考了一下，只要将坐标压缩一下，求最小圆覆盖！！顿时成了逗比题，但是，我却只有50分。NMB!!经过调式，发现第一是精度挂了，后来被0除了。第二，是我随机增量时姿势不对，然后_Shi教我random_shuffle,数国又教我正确的姿势，蒟蒻长见识了！！第二题感觉不可作，第三题发现数是一列一列循环的，对于a<=1000的点，至多只有1000列，每一列中单增，只需暴力求列与列直接的逆序队，期望得分80，实际得分70。
虽然今天垫底了，但我还是感觉收获不少。。
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