徘徊于理想与现实

有一个100层高的大厦，你手中有两个相同的玻璃围棋子。从这个大厦的某一层扔下围棋子就会碎，用你手中的这两个玻璃围棋子，找出一个最优的策略，来得知那个临界层面。

解:
设将100层的大楼分成x段，每段100/x层,f(x)是代表最大的尝试次数！
找到临界的那一段，最多需要x-1次。在那段中找到临界层做多需要100/x -1次，
所以 f(x)=(100/x -1) + x-1

f'(x)=1-100/x^2
令f'(x)=0，解得x=10或-10(舍);
所以f(x)在x=10处取最小值f(10)=18;

还有人说用二分法解决这个题目，先取50,然后25或75...以此类推...这个方法不能用的原因是只有两枚棋子，碎了就没有了..呵呵！！

光线不是很好 有些不清晰

这几天中考，又放了好几天，所有就...去东大逛了一圈
来几张图吧

　　你若要喜爱你自己的价值，你就得给世界创造价值。—歌德
　　小时候，我梦想成为一名职业飞行员，翱翔于那湛蓝的天空，自由自在；小时候，我梦想成为一名知名画家，用自己手中的画笔勾勒出一个属于自己的和谐世界；小时候，我还梦想成为一名天文学家，在代表空间的“宇”和代表时间的“宙” 之中畅游。
　　以前，我经常抱怨上帝对我的不公平，为什么我不是一落地就能歌咏唐诗的文学天才？为什么我没有发现1到100之间100个自然数求和的简便算法？为什么苹果落地的生活现象没有给予我灵感？这不禁使我整天活在不停的抱怨之中，直到有一天明白了乐观看待人生的重要性。改变我能改变的，接受我不能改变的。这就好比那阳光，空气，和水，对于这些自然和非自然的东西，何必那么锱铢必较，放得开一点，也许眼前展现的就是另一个世界。
　　有一天，我仰望星空，发现其实那美丽的星空并不遥远，就如同那梦想一样，只要你踮起脚尖，可能就会触手可及。18岁的我，树立正确的梦想是最重要的事情。对于迷路的航船来说，再远的航行都不会有彼岸。对于盲目的人生来说，再多的努力都不会有成功。
　　窗外，已是夕阳时分；内心，又如旭日初升。我怀揣着梦想，憧憬着未来。我满载着希望，带着些许懵懂，走向明天。

　　2008年5月12日14点28分，那个令我们永远都无法忘记的日子，一个永远都无法忘记的时间。就在那一刻，四川汶川发生了里氏8.0级特大地震，现在每当打开电视，各台总是滚动播出那同一个节目--《抗震救灾，众志成城》。虽然大部分内容都是重复的，但是每当看到那些令我感动的画面，心里便久久不能平静。
　　其中一个短片的名字叫做《让我们记住这些“细节”》，里面的一条短信让我的心为之振颤。“亲爱的宝贝，如果你能活着，一定要记住我爱你”。这是一条深埋于废墟之中的短信，这也是一条永远都发不出去的短信，同时这更是一条饱含伟大母爱的短信。
　　当抢救人员发现这位伟大的母亲的时候，她已经死了，是被垮塌下来的房子压死的。救援人员从废墟的空隙伸手进去确认了她已经死亡，又冲着废墟喊了几声，里面没有任何回应。当人群走到下一个建筑物的时候，救援队长忽然往回跑，边跑边喊着“快过来”。他们又来到她的尸体前，费力的把手伸进女人的身子底下摸索，他摸了几下高声的喊“有人，有个孩子 ，还活着”。经过一番努力，人们小心的把挡着她的废墟清理开，在她的身体下面躺着她的孩子，大概有3、4个月大，因为母亲身体庇护着，他毫发未伤，抱出来的时候，他还安静的睡着。
　　这个孩子长大后可能早以忘却了她母亲的模样，但他会记住，是她母亲给予他的爱，让他的生命之花继续绽放在这个世界上！

　　那是一个梦幻般的季节，梦幻般的夏天，我们在那飘满栀子花香的校园相遇了。人的一生会遇到两万个和自己有缘的人，你就是那两万分之一么？不，我感觉你早已成为了我的二分之一。你留给我的感动构成了一幅幅清晰的场景，在这些场景中，我依稀地看到了另一个我，一个彼时的我，而彼时的我似乎又在寻找更久之前的自己，于是这感动的回忆便重叠着、交替着。我也仿佛成了一个可以穿越时空的精灵，重温着你给予我的所有感动。
　　你给了我雄鹰展翅高飞的骄傲，海燕搏击海浪的勇气。我喜欢看你的一切，你的天真，活泼，你的可爱，乐观。我尤其喜欢你的微笑，像一朵水莲花不胜凉风的娇羞。不时哭泣的你，也显得格外与众不同，如一枝梨花带春雨。
　　如果用一句诗来形容你，那么“山本朦胧；水更缥缈”这句再形象不过了。当你站在我的眼前，你的身影是一种依稀；当你站在我的心中，你的身影是一种清晰。你那水汪汪的大眼睛，像晨曦中的露珠，晶莹剔透。在你美丽的脸颊背后，长着一头飘逸的长发，给我的感觉是分外得清新，仿佛那新生的叶子。
　　在我陷于低谷的时候，总能在你那里寻得心灵的安慰，正所谓“知我者，谓我心忧；不知我者，谓我何求”。在我获得成功的时候，我又能找到一个懂得我，了解我的人，与其共同分享这难得的快乐。
　　因为梦见你离开，我从哭泣中醒来，看夜风吹过窗台，看那些誓言谎言，随往事慢慢飘散，当所有一切都已看平淡，是否有一种坚持还留在心间。

This morning, on the way to school, I met a former classmate. It gave me a feeling that I don’t know how to express.
While riding my bike past a bus stop, I glanced at it. Maybe I do this action whenever I pass a bus stop! Is it my habit? I am not sure. However, today’s glance surprised me a lot! At the beginning, I did not notice anything different, but when I held my head up a little,” whom I saw just now?” I asked myself. I did not recognize her at my first sight, but I noticed that she was as surprised as me. It could be concluded from her look. It was not odd that I did not recognize her; after all we had not seen each other for around two years. I just kept my speed and continued to ride my bike. However, when I turned my head back, I could see that she was waving her hands to me. I did a same action as a reply. I did not return to her and did not have a small talk with her! Perhaps, I should not do that, maybe I should go back and write down each other’s contacts. After all, she is the girl who I regarded as my sister when we were at junior high. She also regarded me as her brother in the same way.
When I reached my school, I was kind of regretful. Perhaps, I was supposed to go back! Although it was an occasional encounter, I also cherish it!

“If you don’t like this subject, try to like the teacher who teaches this it! If you can not like your teacher of this subject, then try to like one of the students who study this subject well!”
I found these words in my memory today when I recalled the first day when I came to this new class! It is said by one of my classmates. However, we had a big discussion this night just due to the words above. They changed it to “try to like the monitor of this subject!”.
I admit that some of her qualities impress me! I can also recall the first encounter with her. Perhaps it can only be the occasional encounter just as I can not stop the rain of the sky! Though I want to, though I try to, but I can not make any difference! Even though you are near me, but I feel very far! Is it foreordination? Can not be changed? Maybe!

     本人认为传就是一种陈诉，诉说一个故事。那么自传就是诉说自己的故事。
     故事发生在一个叫卢祎的男孩身上，也就是我。我不是一落地就能歌咏唐诗的文学天才，也不是一落地就发现了1到100之间100个自然数求和简便算法的数学天才，也不是一落地就能飞奔的运动明星。我就是我，一个独一无二，个性鲜明的男孩。我还有着一颗不平凡的心，一个勇攀高峰的心，这同许多伟大的科学家是一样的。小时候，我虽小但我人小鬼大，总能做出一些有创意的东西，这好比是一条宽广的大路，一条通往成功的路，我称之为“成才之路”，这恰巧也是一本很讨厌的练习册的名字。从小学到初中，一路普普通通，平平凡凡。而高中可谓是我人生的一个转折点，我感谢那个夏天，那个夏天使我来到了这里。在这里，她丰富了我的人生阅历，她给我那稚嫩的翅膀增添了羽翼，她就是我的母校。
     窗外，已是夕阳时分；内心，又如旭日初升。我怀揣着梦想，憧憬着未来。我满载着希望，带着些许懵懂走向明天。

I have been thinking about some simply and kind of important questions for a few days. Every time I lie on my bed, I will close my eyes, think of the matters happened in the daytime. I want to have an objective understanding of myself and of what I do.
It is clearly that there are many things that can’t have any result which are happening in my daily life. But I usually seem to be kind of abnormal to insist on them. To tell you the truth, I don’t know why I’d like to that. Even though I know all my efforts are in vain, I still do it! Who can tell me what changes me? Is it my fault? Am I right? I don’t know clearly! I just want to catch hold of it and not to let it go! But the reality is so cruel that it makes me have no other choice! All I have to do now is just to study for the national college entrance examinations. I can’t do what I like and what I am interested in. What’s worse is that I can’t make real friends with girls. It is always considered as abnormal phenomena if a senior high student dose. I don’t know why and I don’t know whether we are right or not.
Recently, I send text messages to a girl at night! She is my classmate! We just talk some school or social affairs. It makes me feel relaxed and I think we can make our friendship stronger! But who can tell me how long the situation lasts? For weeks? For months? Or till my graduation of my senior high? I have no idea. I only know that I should cherish the hard-earned friendship with others. I don’t care about if it should be right to do so! I just care about what I have now! It is a simply truth that my on-hand possessions are the most valuable! They are worthy! As it sings in the song <where we belong>, this is where we belong. I love westlife, not only love their songs but also the felling of listening to their songs.
In China, senior high is a little horrible! Because you must lean very hard and very well. You have no other choice unless you opt to give up your future. So there are few highlights in the senior high life. Recently we study a module called my highlights at senior high. They are all the real stories happened in the American schools. They have not only parties but also proms which makes me fell a little envy! Maybe years later when I look back at my time at senior high, it would be a highlight and an unforgettable memory! Perhaps it will be my lifelong wealth. Insist on or give up? It is right or false to do so? Nobody knows! Maybe only time could tell.