CGCC火箭自行车

Question

我在看一些旧文件时发现的东西。这似乎是一个巧妙的想法，为一个高尔夫挑战代码。

简介

在一年一度的自行车大慈善大赛(CGCC)上最受欢迎的活动之一是火箭自行车论坛。规则很简单:检查抛物面并在wheather上下注是否有可能到达终点线并准确地停下来。那些打赌这是可能的司机必须证明它才能赢。如果他们不能证明的话，赌它的司机就赢了。

，

，抛物面

这些会议的规则如下：

• 一个抛物面由上坡、下山和平坦的部分组成。在示例中，它分别被建模为/、\和_的序列。
• 自行车以0米/S的速度开始(即在序列的第一个字符之前)。
• 下/上坡使自行车加速/减速1米/S。
• 在平坦的钻头上，驾驶员必须加快速度，或者手动减速，再一次用1米/S减速。他们不能什么都不做。
• 如果自行车在终点线上的速度为0m/S(即在序列的最后一个字符之后)，则该抛物面的驱动是正确的。
• 终点线必须到达。
• 速度必须始终保持为>= 0。如果在任何时候都是/变成0，那么下一段抛物面必须加速自行车，无论是通过下坡的\，还是通过驱动加速的平坦位_。

任务

给定这样的一个抛物线，把它作为第一个程序的输入并输出，不管是否可以按照上面的规则正确地驱动这些抛物面。如果是，将该序列作为第二个程序的输入，并为驱动程序输出一系列指令，说明如何处理平面位。在算例中，分别用+和-对加减速信号进行了信号处理。

The rules

• 我是密码-高尔夫。最短的答案获胜。
• 提交一个或两个程序/S来验证解析(验证器)，并为驱动程序生成有效的指令(生成器)。如果提交了两个项目，则分别对其进行评分，并且独立于所提交的一个项目。
• 可以自由选择I/O格式。所有字符都可以自由替换。
• 生成器程序只需要在能够被正确驱动的抛物面上工作。
• 输入长度没有界。

示例

输入，输入

Input: 
  \_///

Formatted for clarity:
      /
     /
  \_/

Validator output: 
  Falsy (The driver will come to a stop before the last uphill)

Input: 
  \_\__/

Formatted: 
  \_
    \__/

Validator output:
  Truthy

Generator output:
  --+

Input: 
  \_\_\

Formatted:
  \_
    \_
      \

Validator output: 
  Falsy (The driver will finish the parcours with at least 1 m/s)

更多示例：

无效：

/_/\       (Driver can't go uphill with a speed of 0 at the start)

\/_\\/

/\_\//_\

_\/\///_\\

/__//\/_//_\

/_\\\_\/_/__/\_/_\\\\\_\\/\_\//\\\\/\_///\/__\_\_\/_\\\_\//__//_\__/\\___/_\/_/\_\_/\\\\_\_\_\__\_\\

/*
* 提示：该行代码过长，系统自动注释不进行高亮。一键复制会移除系统注释 
/*
* 提示：该行代码过长，系统自动注释不进行高亮。一键复制会移除系统注释 
* * 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
*/
*/

有效：

_\_/
Generator: +-

\\\_//
Generator: -

\/\_\_
Generator: --

_\\__/\/
Generator: +--

\\_\__\/\/
Generator: ---

\\\__\____\/
Generator: +-----

__\\_/\______/\\\_\/\/_///\\_\//\_\/_\_/__/___/__\\_\_//__\\_/___\_______//\/_//__\/\\\__\/__\__/_\/
Generator: ++++++++++++++++++++++-------------------------

/*
* 提示：该行代码过长，系统自动注释不进行高亮。一键复制会移除系统注释 
/*
* 提示：该行代码过长，系统自动注释不进行高亮。一键复制会移除系统注释 
* * 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*/
*/
Generator: ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

发电机输出只是一个例子。它不需要像上面看到的那样被“命令”(虽然我认为这是更实用的实现)。

最后一个测试用例可能有10000个字符长，我的计算机现在可能也可能没有试图找到长度为500000的有效的抛物线。

Answer 1

C++ (gcc)，107个字节(生成器和验证器)

g(char*x,int s=0){return*x?*x-47&&g(x+1,s+1)&&(*x=*x-95?32:43)||*x-92&&s&&g(x+1,s-1)&&(*x=*x-95?32:45):!s;}

在网上试试！

C++ (gcc)，71个字节(只有验证器)

v(char*x,int s=0){return*x?*x-47&&v(x+1,s+1)||*x-92&&s&&v(x+1,s-1):!s;}

在网上试试！

注意:在这两个函数中，可以通过替换布尔数或用位数来保存4个字节，但这会非常慢。在生成器中，(*x=*x-95?32:43)之前和(*x=*x-95?32:45)之前的and在任何情况下都必须是布尔的(否则它不会输出正确的指令)。

C++ (gcc)，239个字节(格式化程序，额外)

#include <cstring>
#include <cstdio>
f(char*x){int*a=new int[strlen(x)+1],i=a[0]=0,m=0,M=0;for(;x[i];++i)a[i+1]=(a[i]+=(x[i]==92))-(x[i]==47),m=a[i]<m?a[i]:m,M=a[i]>M?a[i]:M;for(;m<=M;++m,puts(""))for(i=0;x[i];++i)putchar(a[i]-m?32:x[i]);}

在网上试试！

Answer 2

05AB1E，32 字节数

®1‚„_\Ik©0¢ãʒ0®r.;ηO¤Ā(ªdP}ZÄ=i,

将Validator和Generator程序组合到一个程序中，以保存字节。

输入为字符列表。

输出空字符串为falsey，或将1输出为truthy。此外，将所有可能的生成器输出分别作为减速/加速的-1/1列表。

在网上试试或验证(几乎)所有测试用例.(省略了更大的测试用例；输入的_越多，程序由于ã而变得越慢。)

Explanation:

®1‚          # Push pair [-1,1]
   „_\       # Push string "_\"
      I      # Push the input character-list
       k     # Get the 0-based index of each character in "_\",
             # or -1 if it isn't present (in case of "/")
        ©    # Store this list in variable `®` (without popping)
         0¢  # Count the amount of 0s
           ã # Get the cartesian product of the [-1,1] with this count
             # (resulting in all possible count-sized list of -1s/1s)
ʒ            # Filter this list by:
             #  (implicitly push the current list of -1s/1s
 0           #  Push a 0
  ®          #  Push list `®`
   r         #  Reverse the order of these three
    .;       #  Replace every 0 in list `®` with the -1s/1s of the current list in order
 ηO¤Ā(ªdP    #  Check two things:
             #    1. The sum results in exactly 0
             #    2. No prefix is negative (so we never have any negative m/s speeds)
 η           #   Get the prefixes of this list
  O          #   Sum each inner prefix-list
   ¤         #   Push the last sum (without popping), which is the sum of the full list
    Ā        #   Check if it's NOT 0 (0 if 0; 1 otherwise)
     (       #   Negate it (0 if 0; -1 otherwise)
      ª      #   Append it to the list
       d     #   Check for each inner integer if it's non-negative (>= 0)
        P    #   Check if this is truthy for all of them
}            # Close the filter
             # (we now have a list of all possible paths if truthy; or [] if falsey)
 Z           # Push the flattened maximum (without popping): 1/-1 for truthy; "" for falsey
  Ä          # Get its absolute value: 1 for truthy; "" for falsey
   =         # Output it with trailing newline (without popping)
    i        # And if it was 1:
     ,       #  Also output the list itself on another line

Answer 3

脑盘，124个字节(验证器和生成器)

,[------->-[<->---]+<[---[>->+>->>+<[->-]>[.->]<<<<<<[-]]>[->+>+<<]<[-]]>[->->+>+<<<]<,]--[>+<++++++]>>[--<.>]<++>>[--<<.>>]

如果parcour是有效的，它只输出指令；否则，它会打印一个或多个字节的值0x01，然后是一些指令(当然这些指令没有意义)。

在网上试试！

注意:只有当身高的差值总是小于或等于255时才有效，从一开始就计算在内。

脑盘，103个字节(仅用于生成器)

,[------->-[<->---]+<[---[>->+>-<<<[-]]>[->+>+<<]<[-]]>[->->+<<]<,]--[>+<++++++]>>[--<.>]<++>>[--<<.>>]

在网上试试！

注意:对于这两个程序，输入必须为零结束。只有当输出的+和-的总数小于128时，这两个程序才能工作。