定数

张三是一个卡车司机，他整天奔走于两个城市之间，a市和B市。

说起来，张三开车已经将近二十年了，从十八岁参军开部队的解放车到后来复员转业，给老板开轿车，直到前几年，张三把自己这些年存起来的钱买了一辆卡车。
一个人买卡车做什么？运沙。
在张三的家乡，运沙是一个一本万利的生意，但是暴利与风险并存，这也是一个风险高的行业，最简单的一条：为了加高利润，很多卡车都经过了改装，加高了防护栏，虽然一次拉的货物多了，但是危险系数也随着加大。
另一条就是车祸概率较大。

张三工作勤快，开车谨慎小心，加上老婆勤俭持家，所以日子还算富裕。

一天晚上，张三做了一个梦。
在梦里张三开着车依旧往返于两个城市之间，可是在一个转弯的地方，突然冲出来一辆车，张三手把方向盘，躲了过去，要松口气，可是迎面来了一个身着红色连衣裙套着红外套的妇女，张三躲闪不及，直直撞了过去，后果可想而知。

张三被梦惊醒。

第二天他一直小心翼翼。

他一直记得那个女子的那件红色连衣裙和红色外套。

两市之间有直通高速，因此非常安全，不会有路口。

大约中午的光景，张三开车去买午饭，路过了一个路口，他打了一个机灵，刚转过路口的确有一车突然从另一个路口冲出，张三手把方向盘，躲了过去。

但是所幸并没有撞到什么人。

一分钟后，张三看到在路边有一位女士在买东西，她正好穿着一件红色的连衣裙，套着一件红色外套。
于是他用高价买下了那件衣服，起初女子不同意，但是张三拿出几张“红牛”，经不住诱惑，妇女答应了，她到超市买了一件便宜的外套穿上，把那件红上衣外套交给张三。

张三把它平铺在地上，二话不说，上车，一踩油门，压了过去。
头也没有回，就走了。

那女子觉得可惜，这么新的衣服，一水还没有洗。
于是她去捡那件衣服，掸去外套的灰尘，又穿上了，刚要转过路口，就在这个时候，一辆卡车迎面驶来，那辆车躲闪不及，径直压了过去。

她死了。
他倒在血泊里，身上穿着一件红色的外套。

如果不是女人去穿上了那件放在路中间的衣服也就不会被刚刚转弯的车压死，如果不是衣服没有太脏她就不会再穿。
如果不是张三压了这件衣服，就不会站上一点点灰尘。
如果不是张三买下了这件衣服，他就不会压。
如果不是女人穿着红色的外套，张三就不会买下这件外套。
如果不是张三昨晚梦见自己压死了一个穿红衣服的女人就不会找到这位穿红衣服的女人。

另一方面，如果不是要去看自己生病的母亲，那女人就不会在那条路上买水果。
如果不是天气变冷就不会穿上那件红外套。
同时对那位司机来说，如果不是自己正好接了一个电话就不会撞到那位女人，如果不是老婆催着他赶快回家他也不会走这条小路，如果不是老婆看到这个男人的衣领上有口红就不会叫老公回家，如果不是昨天晚上男人和一群兄弟去几把就不会认识一个小姐，如果不是因为男人心情不好就不会和兄弟们去酒吧，如果不是男人奖金落空就不会不高兴，不过不是有人高男人的小报告，老板就不会让男人下不来台，如果不是老板被老婆买了一吨就不会心情不好，如果不是自己的保养的二奶和老婆见了面，就不会然老婆生气……

所有的一切乍看之下没有任何关系，但是所有的一切加起来其就注定一件事情，那就是穿红外套的女人一定会死。

不论你怎么挣扎，怎么想改变，都改变不了。

这就是定数。
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第二天早上六点，张三和往常一样吃早饭。

打开报纸，《凤凰早报》。

上面头条写着一则消息：昨日，在福星路口发生一起车祸。
死者是一名中年妇女，身着一身红色连衣裙一件红色外套……

Introduce:Zhang San is a truckman, he runs all the day between two cities, a city and B city.
Say, zhang San drives already near 20 years, join the army from 18 years old the emancipatory car of army is demobilized to later be transferred to civilian work, drive a car to the boss, till before a few years, zhang San oneself these year put the money that rise to buy a truck.
What does a person buy a lorry to do? Carry sand.
In Zhang San's home town, carry sand is the business of a make big profits with a small capital, but sudden huge profits and risk coexist, this also is the industry with a high risk, a the simplest: To increase usury profit, a lot of lorries were passed change one's costume or dress, add defend high column, although be pulled goods is much, but risk factor also as increase.
Another is traffic accident probability bigger.
Diligent of Zhang San job, drive keep one's eyes peeled, add run one's home of wife hardworking and thrifty, so the day still calculates rich.
A day night, zhang San made a dream.
In the dream Zhang San is opening a car to go there and back between two cities as before, but be in a turning place, develop a car suddenly, steering wheel of Zhang San handgrip, hid, want soft tone, but came to to wear gules dress to covering the woman of red jacket head on, zhang San dodges not as good as, bumped into the past continuously continuously, consequence cans be imagined.
Zhang San is slept lightly by the dream.
The following day he is cautious all the time.
He remembers that gules dress of that woman and red jacket all the time.
There is direct high speed between two city, because this is very safe, won't have crossing.
About the about midday, zhang San drives go buying lunch, transient a crossing, he hit argute, just had turned crossing has one car to rush suddenly from another crossing really, steering wheel of Zhang San handgrip, hid.
But what I hope and did not strike what person.
After a minute, zhang San sees there is a lady to be in in roadside shop, her as it happens is wearing a gules dress, covering a red jacket.
Then he bought that clothes with high price, at first the woman does not agree, but Zhang San takes out a few pieces " Gong Niu " , via living alluring, the woman agreed, she bought a cheap coat to put on to the supermarket, give Zhang San overcoat of that red jacket.
Zhang San is its tile on the ground, demur does not say, get on a car, one step on the gas, controlled the past.
The head also was not answered, went.
That woman feels regrettablly, so new clothes, one water has not been washed.
Then she collects that dress, whisk goes the dirt of coat, put on again, just should have turned crossing, be in this moment, a lorry sails head on come, that car dodges not as good as, controlled the past directly.
She died.
He falls in pool of blood, there is a red jacket on the body.
If not be the wife went putting on that to be put in the dress among the road also16514