第19章 高考首日（2 / 2）
“所有考生注意，准备入场！存放手机和个人物品，出示身份证、准考证，依次从前门入场！”监考老师的声音，打断了场外的暗流涌动。
早上九点，高考语文正式开考。
几乎每个考生拿到考卷，第一反应就是翻看最后的作文题。这样在做前面题目时，大脑也会无意识地构思作文。中途遇到的阅读材料，也有可能激发写作的灵感。
“……隨著网际网路的普及，人工智慧的应用，越来越多的问题能很快得到答案。那么，我们的问题是否会越来越少？”洛北默默读著题目。
这是一道有强烈思辨性质的作文题，可以展开写的点很多。倘若是班里的作文高手，此时势必要整点“信息茧房”、“智械危机”之类的高深论述。
从前的洛北，以他文科老大难的水准，对於“窗帘为何是蓝色”的理解，他得绞尽脑汁；而要给“鱼眼里诡异的光”解释原因，也难免张口结舌。所以对此类作文，绝对会离题万里，把好好的一个《儿为什么这样红》，转头给写成《观赏植物色突变的原因及研究现状》。
但已经是满级“做题家”的他，早已今非昔比。大师级技能“落笔如神”瞬间发动，文思如泉涌。
駢四儷六，信手拈来。引经据典，如数家珍。
思路前所未有地明朗，曾经咬著笔桿半天憋不出字的困窘，仿佛隔世一梦。
……
转头到了下午。
开考前，网上就有小道消息传言，今年新课標的数学卷题量很足，难度同样不容小覷。
试卷一发，果然如此。又怪又难，甚至让人怀疑是命题组又请葛大爷出山了。而他老人家人老心雄宝刀不老，刀刀要人性命。
但这些对洛北並没造成什么妨碍，一道道题势如破竹，他很顺利地推进到了末尾的压轴题。
没想到，埋伏在最后的是头拦路虎，而且分外地张牙舞爪和面目狰狞。
“离散对数在密码学中有重要的应用。设p是素数，集合x={1，2，...，p-1}，若u，v属於x，於n……”洛北无声地默读著题，“……则称n是以a为底b的离散对数。请根据以上信息解答……”
而另一头。
路行舟的速度也很快，只比洛北略慢。慢不多时，也衝刺到了最后的大题。
不过，“数学小王子”对著这詰屈聱牙的题面，反覆看了三遍，愣是一头猪也没有，更不用说头绪了。
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不知道是否因为命题组老师对往年常规题型腻歪够了，所以今年存心给大伙，整个大的活儿。
离散对数……路行舟凭著奥赛积累的一点大学物理知识，反应过来，这似乎是初等数论的一个知识点。
当然，他只是有所耳闻，不曾深入了解。
初等数论？特么的，这超纲了吧？
不过，路行舟也知道，所谓高考压轴题，歷来喜欢把大学数学的一部分內容改头换面，然后下放到高中考察，美其名曰区分度。
这对高分考生其实很友好——如果题目太简单，没有区分度，大家都考一样的分，那怎么从乌泱泱的考生里，分出皇帝和太监……哦不，凤凰和草鸡呢？
路行舟努力平復心绪，告诫自己不要慌神。题目確实很难，但是大家都难。
能难住他“舟神”的题，其他人也绝不好过！
脑海里，却瞬时浮现某个人的脸……那洛北呢，这傢伙是不是，也被压轴题卡住了？
这个念头刚起，他下意识地抬头，望向坐在右前方的洛北。能依稀看到洛北面前的试卷，翻到了最后一页的压轴题上。
而洛北看起来只是沉吟了一会，就埋头伏案，笔尖不停。
不是，他难道就已经……做出来了吗？
这个念头乍然冒出来时，路行舟的心中，骤起慌乱。
