编写尽可能短的代码，如果两个给定的整数值相等或它们的总和或绝对差为5，则返回true。

测试用例示例：

4 1 => True
10 10 => True
1 3 => False
6 2 => False
1 6 => True
-256 -251 => True
6 1 => True
-5 5 => False

我在python2中能想到的最短长度是56个字符：

x=input();y=input();print all([x-y,x+y-5,abs(x-y)-5])<1

-9，谢谢@ElPedro。它采用x，y格式的输入：

x,y=input();print all([x-y,x+y-5,abs(x-y)-5])<1

Python 2，30个字节

lambda a,b:a in(b,5-b,b-5,b+5)

在线尝试！

_{Arnauld保存了一个字节}

_{alephalpha保存的三个字节}

JavaScript（ES6），28个字节

将输入作为(a)(b)。返回$0$或$1$。

a=>b=>a+b==5|!(a-=b)|a*a==25

在线尝试！

Dyalog APL, 9 bytes

=∨5∊+,∘|-

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Spelled out:

  =   ∨  5      ∊                +   , ∘    |            -
equal or 5 found in an array of sum and absolute of difference.

x86 machine code, 39 bytes

00000000: 6a01 5e6a 055f 5251 31c0 39d1 0f44 c601  j.^j._RQ1.9..D..
00000010: d139 cf0f 44c6 595a 29d1 83f9 050f 44c6  .9..D.YZ).....D.
00000020: 83f9 fb0f 44c6 c3                        ....D..

Assembly

section .text
	global func
func:					;inputs int32_t ecx and edx
	push 0x1
	pop esi
	push 0x5
	pop edi
	push edx
	push ecx
	xor eax, eax

	;ecx==edx?
	cmp ecx, edx
	cmove eax, esi

	;ecx+edx==5?
	add ecx, edx
	cmp edi, ecx
	cmove eax, esi
	
	;ecx-edx==5?
	pop ecx
	pop edx
	sub ecx, edx
	cmp ecx, 5
	
	;ecx-edx==-5?
	cmove eax, esi
	cmp ecx, -5
	cmove eax, esi

	ret

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J, 12 11 bytes

1 byte saved thanks to Adám

1#.=+5=|@-,+

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Explanation

This is equivalent to:

1 #. = + 5 = |@- , +

This can be divided into the following fork chain:

(= + (5 e. (|@- , +)))

Or, visualized using 5!:4<'f':

  ┌─ =               
  ├─ +               
──┤   ┌─ 5           
  │   ├─ e.          
  └───┤          ┌─ |
      │    ┌─ @ ─┴─ -
      └────┼─ ,      
           └─ +      

Annotated:

  ┌─ =                                     equality
  ├─ +                                     added to (boolean or)
──┤   ┌─ 5                                   noun 5
  │   ├─ e.                                  is an element of
  └───┤          ┌─ |  absolute value         |
      │    ┌─ @ ─┴─ -  (of) subtraction       |
      └────┼─ ,        paired with            |
           └─ +        addition               | any of these?

R, 40 bytes (or 34)

function(x,y)any((-1:1*5)%in%c(x+y,x-y))

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For non-R users:

• -1:1*5 expands to [-5, 0, 5]
• the %in% operator takes elements from the left and checks (element-wise) if they exist in the vector on the right

A direct port of @ArBo's solution has 35 34 bytes, so go upvote that answer if you like it:

function(x,y)x%in%c(y--1:1*5,5-y)

Python 2, 29 31 bytes

lambda a,b:a+b==5or`a-b`in"0-5"

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Since I didn't manage to read the task carefully the first time, in order to fix it, I had to come up with a completely different approach, which is unfortunately not as concise.

8086 machine code, 22 20 bytes

8bd0 2bc3 740e 7902 f7d8 3d0500 7405 03d3 83fa05

Ungolfed:

ESD  MACRO
    LOCAL SUB_POS, DONE
    MOV  DX, AX     ; Save AX to DX
    SUB  AX, BX     ; AX = AX - BX
    JZ   DONE       ; if 0, then they are equal, ZF=1
    JNS  SUB_POS    ; if positive, go to SUB_POS
    NEG  AX         ; otherwise negate the result
SUB_POS:
    CMP  AX, 5      ; if result is 5, ZF=1
    JZ   DONE
    ADD  DX, BX     ; DX = DX + BX
    CMP  DX, 5      ; if 5, ZF=1
DONE:
    ENDM

Input numbers in AX and BX and returns Zero Flag (ZF=1) if result is true. If desired, you can also determine which condition was true with the following:

• ZF = 1 and DX = 5 ; sum is 5
• ZF = 1 and AX = 5 ; diff is 5
• ZF = 1 and AX = 0 ; equal
• ZF = 0 ; result false

If the difference between the numbers is 0, we know they are equal. Otherwise if result is negative, then first negate it and then check for 5. If still not true, then add and check for 5.

Sample PC DOS test program. Download it here (ESD.COM).

START:
    CALL INDEC      ; input first number into AX
    MOV  BX, AX     ; move to BX
    CALL INDEC      ; input second number into BX
    ESD             ; run "Equal, sum or difference" routine
    JZ   TRUE       ; if ZF=1, result is true
FALSE:
    MOV  DX, OFFSET FALSY   ; load Falsy string
    JMP  DONE
TRUE:
    MOV  DX, OFFSET TRUTHY  ; load Truthy string
DONE:
    MOV  AH, 9      ; DOS display string
    INT  21H        ; execute
    MOV  AX, 4C00H  ; DOS terminate
    INT  21H        ; execute

TRUTHY   DB 'Truthy$'
FALSY    DB 'Falsy$'

INCLUDE INDEC.ASM   ; generic decimal input prompt routine

Output of test program:

A>ESD.COM
: 4
: 1
Truthy

A>ESD.COM
: 10
: 10
Truthy

A>ESD.COM
: 1
: 3
Falsy

A>ESD.COM
: 6
: 2
Falsy

A>ESD.COM
: 1
: 6
Truthy

A>ESD.COM
: -256
: -251
Truthy

A>ESD.COM
: 6
: 1
Truthy

A>ESD.COM
: 9999999999
: 9999999994
Truthy

Jelly, 7 bytes

+,ạ5eo=

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How it works

+,ạ5eo=  Main link. Arguments: x, y (integers)

+        Yield x+y.
  ạ      Yield |x-y|.
 ,       Pair; yield (x+y, |x-y|).
   5e    Test fi 5 exists in the pair.
      =  Test x and y for equality.
     o   Logical OR.

Python 2, 38 bytes

-2 bytes thanks to @DjMcMayhem

lambda a,b:a+b==5or abs(a-b)==5or a==b

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Java (JDK), 30 bytes

a->b->a+b==5|a==b|(b-=a)*b==25

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Wolfram Language (Mathematica), 22 bytes

Takes input as [a][b].

MatchQ[#|5-#|#-5|#+5]&

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PowerShell, 48 44 40 bytes

param($a,$b)$b-in($a-5),(5-$a),(5+$a),$a

Try it online! or Verify all Test Cases

Takes input $a and $b. Checks if $b is -in the group ($a-5, 5-$a 5+$a, or $a), which checks all possible combinations of $a,$b, and 5.

-4 bytes thanks to mazzy.
-4 bytes thanks to KGlasier.

Pascal (FPC), 26 70 bytes

Edit: + input variables.

Procedure z(a,b:integer);begin Writeln((abs(a-b)in[0,5])or(a+b=5))end;

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(abs(a-b)in[0,5])or(a+b=5)

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I hope that my answer is according to all rules of code-golf. It was fun anyway.

C# (.NET Core), 43, 48, 47, 33 bytes

EDIT: Tried to use % and apparently forgot how to %. Thanks to Arnauld for pointing that out!

EDIT2: AdmBorkBork with a -1 byte golf rearranging the parentheses to sit next to the return so no additional space is needed!

EDIT3: Thanks to dana for -14 byte golf for the one-line return shortcut and currying the function (Ty Embodiment of Ignorance for linking to TIO).

C# (.NET Core), 33 bytes

a=>b=>a==b|a+b==5|(a-b)*(a-b)==25

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C (gcc), 33 bytes

f(a,b){a=!(a+b-5&&(a-=b)/6|a%5);}

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Tried an approach I didn't see anyone else try using. The return expression is equivalent to a+b==5||((-6<a-b||a-b<6)&&(a-b)%5==0).

Scala, 43 bytes

def f(a:Int,b:Int)=a+b==5|(a-b).abs==5|a==b

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Perl 6, 24 bytes

-1 byte thanks to Grimy

{$^a-$^b==5|0|-5|5-2*$b}

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This uses the Any Junction but technically, ^ could work as well.

Explanation:

{                      }  # Anonymous code block
 $^a-$^b==                # Is the difference equal to
           | |  |        # Any of
          0 
            5
              -5
                 5-2*$b

C (gcc), 41 34 bytes

f(a,b){a=5==abs(a-b)|a+b==5|a==b;}

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05AB1E, 13 12 bytes

ÐO5Qs`α5QrËO

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Takes input as a list of integers, saving one byte. Thanks @Wisław!

Alternate 12 byte answer

Q¹²α5Q¹²+5QO

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This one takes input on separate lines.

05AB1E, 10 bytes

OIÆ‚Ä50SåZ

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O           # Sum the input.
 IÆ         # Reduced subtraction of the input.
   ‚        # Wrap [sum,reduced_subtraction]
    Ä       # abs[sum,red_sub]
     50S    # [5,0]
        å   # [5,0] in abs[sum,red_sub]?
         Z  # Max of result, 0 is false, 1 is true.

Tried to do it using stack-only operations, but it was longer.

Ruby, 34 Bytes

->(a,b){[a+5,a-5,5-a,a].include?b}

Online Eval - Thanks @ASCII-Only

Tcl, 53 bytes

proc P a\ b {expr abs($a-$b)==5|$a==$b|abs($a+$b)==5}

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Japt, 14 13 bytes

¥VªaU ¥5ª5¥Nx

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Batch, 81 bytes

@set/as=%1+%2,d=%1-%2
@if %d% neq 0 if %d:-=% neq 5 if %s% neq 5 exit/b
@echo 1

Takes input as command-line arguments and outputs 1 on success, nothing on failure. Batch can't easily do disjunctions so I use De Morgan's laws to turn it into a conjunction.

Charcoal, 18 bytes

Ｎθ¿№⟦θ⁺⁵θ⁻⁵θ⁻θ⁵⟧Ｎ1

Try it online! Link is to verbose version of code. Port of @ArBo's Python 2 solution.

Japt, 13 12 bytes

x ¥5|50ìøUra

Try it or run all test cases

x ¥5|50ìøUra
                 :Implicit input of array U
x                :Reduce by addition
  ¥5             :Equal to 5?
    |            :Bitwise OR
     50ì         :Split 50 to an array of digits
        ø        :Contains?
         Ur      :  Reduce U
           a     :    By absolute difference

Common Lisp, 48 bytes

(lambda(a b)(find 5(list(abs(- b a))a(+ a b)b)))

Brachylog, 8 bytes

=|+5|-ȧ5

Takes input as a list of two numbers (use _ for negatives). Try it online!

Explanation

Pretty much a direct translation of the spec:

=          The two numbers are equal
 |         or
  +        The sum of the two numbers
   5       is 5
    |      or
     -     The difference of the two numbers
      ȧ    absolute value
       5   is 5

Retina 0.8.2, 82 bytes

\d+
$*
^(-?1*) \1$|^(-?1*)1{5} -?\2$|^-?(-?1*) (\3)1{5}$|^-?(1 ?){5}$|^(1 ?-?){5}$

Try it online! Link includes test cases. Explanation: The first two lines convert the inputs into unary. The final line then checks for any of the permitted matches:

^(-?1*) \1$                              x==y
^(-?1*)1{5} -?\2$   x>=0 y>=0 x=5+y i.e. x-y=5
                    x>=0 y<=0 x=5-y i.e. x+y=5
                    x<=0 y<=0 x=y-5 i.e. y-x=5
^-?(-?1*) (\3)1{5}$ x<=0 y<=0 y=x-5 i.e. x-y=5
                    x<=0 y>=0 y=5-x i.e. x+y=5
                    x>=0 y>=0 y=5+x i.e. y-x=5
^-?(1 ?){5}$        x>=0 y>=0 y=5-x i.e. x+y=5
                    x<=0 y>=0 y=5+x i.e. y-x=5
^(1 ?-?){5}$        x>=0 y>=0 x=5-y i.e. x+y=5
                    x>=0 y<=0 x=5+y i.e. x-y=5

Pivoted by the last column we get:

x==y            ^(-?1*) \1$
x+y=5 x>=0 y>=0 ^-?(1 ?){5}$
      x>=0 y>=0 ^(1 ?-?){5}$
      x>=0 y<=0 ^(-?1*)1{5} -?\2$
      x<=0 y>=0 ^-?(-?1*) (\3)1{5}$
      x<=0 y<=0 (impossible)       
x-y=5 x>=0 y>=0 ^(-?1*)1{5} -?\2$
      x>=0 y<=0 ^(1 ?-?){5}$
      x<=0 y>=0 (impossible)
      x<=0 y<=0 ^-?(-?1*) (\3)1{5}$
y-x=5 x>=0 y>=0 ^-?(-?1*) (\3)1{5}$
      x>=0 y<=0 (impossible)
      x<=0 y>=0 ^-?(1 ?){5}$
      x<=0 y<=0 ^(-?1*)1{5} -?\2$