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Am I not good enough for you?
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$begingroup$
Background:
The current Perfect Numbers challenge is rather flawed and complicated, since it asks you to output in a complex format involving the factors of the number. This is a purely decision-problem repost of the challenge.
Challenge
Given a positive integer through any standard input format, output whether it is not perfect.
A perfect number is a number that is equal to the sum of all its proper divisors (its positive divisors less than itself). For example, $6$ is a perfect number, since its divisors are $1,2,3$, which sum up to $6$, while $12$ is not a perfect number since its divisors ( $1,2,3,4,6$ ) sum up to $16$, not $12$.
Test Cases:
Imperfect:
1,12,13,18,20,1000,33550335
Perfect:
6,28,496,8128,33550336,8589869056
Rules
- Your program doesn't have to complete the larger test cases, if there's memory or time constraints, but it should be theoretically able to if it were given more memory/time.
- Output can be two distinct and consistent values through any allowed output format. If it isn't immediately obvious what represents Truthy/Falsey, please make sure to specify in your answer.
- This means your values don't have to be literally Truthy/Falsey. Your Truthy output may evaluate to false in your language and vice-versa.
code-golf number decision-problem number-theory factoring
asked 46 mins ago
Jo KingJo King
24.6k357126
$endgroup$
add a comment |
$begingroup$
Background:
The current Perfect Numbers challenge is rather flawed and complicated, since it asks you to output in a complex format involving the factors of the number. This is a purely decision-problem repost of the challenge.
Challenge
Given a positive integer through any standard input format, output whether it is not perfect.
A perfect number is a number that is equal to the sum of all its proper divisors (its positive divisors less than itself). For example, $6$ is a perfect number, since its divisors are $1,2,3$, which sum up to $6$, while $12$ is not a perfect number since its divisors ( $1,2,3,4,6$ ) sum up to $16$, not $12$.
Test Cases:
Imperfect:
1,12,13,18,20,1000,33550335
Perfect:
6,28,496,8128,33550336,8589869056
Rules
- Your program doesn't have to complete the larger test cases, if there's memory or time constraints, but it should be theoretically able to if it were given more memory/time.
- Output can be two distinct and consistent values through any allowed output format. If it isn't immediately obvious what represents Truthy/Falsey, please make sure to specify in your answer.
- This means your values don't have to be literally Truthy/Falsey. Your Truthy output may evaluate to false in your language and vice-versa.
code-golf number decision-problem number-theory factoring
asked 46 mins ago
Jo KingJo King
24.6k357126
$endgroup$
$begingroup$
Wait, so truthy is for values that aren't perfect, and falsey is for values that are?
$endgroup$
– Esolanging Fruit
30 mins ago
$begingroup$
@EsolangingFruit Yes, though the actual output values don't really matter, so you can output true for perfect numbers if you wish
$endgroup$
– Jo King
28 mins ago
$begingroup$
Fair enough, but wording the challenge as "output whether it is not perfect" makes the test cases slightly confusing if you interpret "truthy" as meaning "values corresponding to true".
$endgroup$
– Esolanging Fruit
27 mins ago
$begingroup$
@EsolangingFruit Good point. I've renamed the test cases toImperfect/Perfectto make it clearer
$endgroup$
– Jo King
25 mins ago
add a comment |
$begingroup$
Background:
The current Perfect Numbers challenge is rather flawed and complicated, since it asks you to output in a complex format involving the factors of the number. This is a purely decision-problem repost of the challenge.
Challenge
Given a positive integer through any standard input format, output whether it is not perfect.
A perfect number is a number that is equal to the sum of all its proper divisors (its positive divisors less than itself). For example, $6$ is a perfect number, since its divisors are $1,2,3$, which sum up to $6$, while $12$ is not a perfect number since its divisors ( $1,2,3,4,6$ ) sum up to $16$, not $12$.
Test Cases:
Imperfect:
1,12,13,18,20,1000,33550335
Perfect:
6,28,496,8128,33550336,8589869056
Rules
- Your program doesn't have to complete the larger test cases, if there's memory or time constraints, but it should be theoretically able to if it were given more memory/time.
- Output can be two distinct and consistent values through any allowed output format. If it isn't immediately obvious what represents Truthy/Falsey, please make sure to specify in your answer.
- This means your values don't have to be literally Truthy/Falsey. Your Truthy output may evaluate to false in your language and vice-versa.
code-golf number decision-problem number-theory factoring
asked 46 mins ago
Jo KingJo King
24.6k357126
$endgroup$
Background:
The current Perfect Numbers challenge is rather flawed and complicated, since it asks you to output in a complex format involving the factors of the number. This is a purely decision-problem repost of the challenge.
Challenge
Given a positive integer through any standard input format, output whether it is not perfect.
A perfect number is a number that is equal to the sum of all its proper divisors (its positive divisors less than itself). For example, $6$ is a perfect number, since its divisors are $1,2,3$, which sum up to $6$, while $12$ is not a perfect number since its divisors ( $1,2,3,4,6$ ) sum up to $16$, not $12$.
Test Cases:
Imperfect:
1,12,13,18,20,1000,33550335
Perfect:
6,28,496,8128,33550336,8589869056
Rules
- Your program doesn't have to complete the larger test cases, if there's memory or time constraints, but it should be theoretically able to if it were given more memory/time.
- Output can be two distinct and consistent values through any allowed output format. If it isn't immediately obvious what represents Truthy/Falsey, please make sure to specify in your answer.
- This means your values don't have to be literally Truthy/Falsey. Your Truthy output may evaluate to false in your language and vice-versa.
code-golf number decision-problem number-theory factoring
code-golf number decision-problem number-theory factoring
asked 46 mins ago
Jo KingJo King
24.6k357126
asked 46 mins ago
Jo KingJo King
24.6k357126
edited 26 mins ago
Jo King
asked 46 mins ago
Jo KingJo King
24.6k357126
asked 46 mins ago
Jo KingJo King
24.6k357126
asked 46 mins ago
Jo KingJo King
24.6k357126
24.6k357126
$begingroup$
Wait, so truthy is for values that aren't perfect, and falsey is for values that are?
$endgroup$
– Esolanging Fruit
30 mins ago
$begingroup$
@EsolangingFruit Yes, though the actual output values don't really matter, so you can output true for perfect numbers if you wish
$endgroup$
– Jo King
28 mins ago
$begingroup$
Fair enough, but wording the challenge as "output whether it is not perfect" makes the test cases slightly confusing if you interpret "truthy" as meaning "values corresponding to true".
$endgroup$
– Esolanging Fruit
27 mins ago
$begingroup$
@EsolangingFruit Good point. I've renamed the test cases toImperfect/Perfectto make it clearer
$endgroup$
– Jo King
25 mins ago
add a comment |
$begingroup$
Wait, so truthy is for values that aren't perfect, and falsey is for values that are?
$endgroup$
– Esolanging Fruit
30 mins ago
$begingroup$
@EsolangingFruit Yes, though the actual output values don't really matter, so you can output true for perfect numbers if you wish
$endgroup$
– Jo King
28 mins ago
$begingroup$
Fair enough, but wording the challenge as "output whether it is not perfect" makes the test cases slightly confusing if you interpret "truthy" as meaning "values corresponding to true".
$endgroup$
– Esolanging Fruit
27 mins ago
$begingroup$
@EsolangingFruit Good point. I've renamed the test cases toImperfect/Perfectto make it clearer
$endgroup$
– Jo King
25 mins ago
$begingroup$
Wait, so truthy is for values that aren't perfect, and falsey is for values that are?
$endgroup$
– Esolanging Fruit
30 mins ago
$begingroup$
Wait, so truthy is for values that aren't perfect, and falsey is for values that are?
$endgroup$
– Esolanging Fruit
30 mins ago
$begingroup$
@EsolangingFruit Yes, though the actual output values don't really matter, so you can output true for perfect numbers if you wish
$endgroup$
– Jo King
28 mins ago
$begingroup$
@EsolangingFruit Yes, though the actual output values don't really matter, so you can output true for perfect numbers if you wish
$endgroup$
– Jo King
28 mins ago
$begingroup$
Fair enough, but wording the challenge as "output whether it is not perfect" makes the test cases slightly confusing if you interpret "truthy" as meaning "values corresponding to true".
$endgroup$
– Esolanging Fruit
27 mins ago
$begingroup$
Fair enough, but wording the challenge as "output whether it is not perfect" makes the test cases slightly confusing if you interpret "truthy" as meaning "values corresponding to true".
$endgroup$
– Esolanging Fruit
27 mins ago
$begingroup$
@EsolangingFruit Good point. I've renamed the test cases to
Imperfect/Perfect to make it clearer$endgroup$
– Jo King
25 mins ago
$begingroup$
@EsolangingFruit Good point. I've renamed the test cases to
Imperfect/Perfect to make it clearer$endgroup$
– Jo King
25 mins ago
add a comment |
4 Answers
4
active
oldest
votes
$begingroup$
Japt -!, 4 bytes
¥â¬x
For some reason ¦ doesnt work on tio so I need to use the -! flag and ¥ instead
Try it online!
answered 34 mins ago
Luis felipe De jesus MunozLuis felipe De jesus Munoz
5,59821670
$endgroup$
add a comment |
$begingroup$
R, 33 bytes
!2*(n=scan())-sum(which(!n%%1:n))
Try it online!
Returns TRUE for perfect numbers ans FALSE for imperfect ones.
answered 14 mins ago
GiuseppeGiuseppe
16.8k31052
$endgroup$
$begingroup$
What do the 2 !s in a row get you?
$endgroup$
– CT Hall
11 mins ago
add a comment |
$begingroup$
CJam, 17 bytes
ri_,(;{1$%!},:+=
Try it online!
answered 28 mins ago
Esolanging FruitEsolanging Fruit
8,50932674
$endgroup$
add a comment |
$begingroup$
Javascript, 62
n=>n==[...Array(n).keys()].filter(a=>n%a<1).reduce((a,b)=>a+b)
Explanation (although it's pretty simple)
n=> //return function that takes n
n== //and returns if n is equal to
[...Array(n).keys()] //an array [0..(n-1)]...
.filter(a=>n%a<1) //where all of the elements that are not divisors of n are taken out...
.reduce((a,b)=>a+b) //summed up
Thanks to Jo King for the improvement!
answered 32 mins ago
zeveezevee
22016
$endgroup$
$begingroup$
thanks! Added that in
$endgroup$
– zevee
24 mins ago
add a comment |
Your Answer
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4 Answers
4
active
oldest
votes
4 Answers
4
active
oldest
votes
active
oldest
votes
active
oldest
votes
$begingroup$
Japt -!, 4 bytes
¥â¬x
For some reason ¦ doesnt work on tio so I need to use the -! flag and ¥ instead
Try it online!
answered 34 mins ago
Luis felipe De jesus MunozLuis felipe De jesus Munoz
5,59821670
$endgroup$
add a comment |
$begingroup$
Japt -!, 4 bytes
¥â¬x
For some reason ¦ doesnt work on tio so I need to use the -! flag and ¥ instead
Try it online!
answered 34 mins ago
Luis felipe De jesus MunozLuis felipe De jesus Munoz
5,59821670
$endgroup$
add a comment |
$begingroup$
Japt -!, 4 bytes
¥â¬x
For some reason ¦ doesnt work on tio so I need to use the -! flag and ¥ instead
Try it online!
answered 34 mins ago
Luis felipe De jesus MunozLuis felipe De jesus Munoz
5,59821670
$endgroup$
Japt -!, 4 bytes
¥â¬x
For some reason ¦ doesnt work on tio so I need to use the -! flag and ¥ instead
Try it online!
answered 34 mins ago
Luis felipe De jesus MunozLuis felipe De jesus Munoz
5,59821670
edited 28 mins ago
answered 34 mins ago
Luis felipe De jesus MunozLuis felipe De jesus Munoz
5,59821670
answered 34 mins ago
Luis felipe De jesus MunozLuis felipe De jesus Munoz
5,59821670
answered 34 mins ago
Luis felipe De jesus MunozLuis felipe De jesus Munoz
5,59821670
5,59821670
add a comment |
add a comment |
$begingroup$
R, 33 bytes
!2*(n=scan())-sum(which(!n%%1:n))
Try it online!
Returns TRUE for perfect numbers ans FALSE for imperfect ones.
answered 14 mins ago
GiuseppeGiuseppe
16.8k31052
$endgroup$
$begingroup$
What do the 2 !s in a row get you?
$endgroup$
– CT Hall
11 mins ago
add a comment |
$begingroup$
R, 33 bytes
!2*(n=scan())-sum(which(!n%%1:n))
Try it online!
Returns TRUE for perfect numbers ans FALSE for imperfect ones.
answered 14 mins ago
GiuseppeGiuseppe
16.8k31052
$endgroup$
$begingroup$
What do the 2 !s in a row get you?
$endgroup$
– CT Hall
11 mins ago
add a comment |
$begingroup$
R, 33 bytes
!2*(n=scan())-sum(which(!n%%1:n))
Try it online!
Returns TRUE for perfect numbers ans FALSE for imperfect ones.
answered 14 mins ago
GiuseppeGiuseppe
16.8k31052
$endgroup$
R, 33 bytes
!2*(n=scan())-sum(which(!n%%1:n))
Try it online!
Returns TRUE for perfect numbers ans FALSE for imperfect ones.
answered 14 mins ago
GiuseppeGiuseppe
16.8k31052
answered 14 mins ago
GiuseppeGiuseppe
16.8k31052
answered 14 mins ago
GiuseppeGiuseppe
16.8k31052
answered 14 mins ago
GiuseppeGiuseppe
16.8k31052
16.8k31052
$begingroup$
What do the 2 !s in a row get you?
$endgroup$
– CT Hall
11 mins ago
add a comment |
$begingroup$
What do the 2 !s in a row get you?
$endgroup$
– CT Hall
11 mins ago
$begingroup$
What do the 2 !s in a row get you?
$endgroup$
– CT Hall
11 mins ago
$begingroup$
What do the 2 !s in a row get you?
$endgroup$
– CT Hall
11 mins ago
add a comment |
$begingroup$
CJam, 17 bytes
ri_,(;{1$%!},:+=
Try it online!
answered 28 mins ago
Esolanging FruitEsolanging Fruit
8,50932674
$endgroup$
add a comment |
$begingroup$
CJam, 17 bytes
ri_,(;{1$%!},:+=
Try it online!
answered 28 mins ago
Esolanging FruitEsolanging Fruit
8,50932674
$endgroup$
add a comment |
$begingroup$
CJam, 17 bytes
ri_,(;{1$%!},:+=
Try it online!
answered 28 mins ago
Esolanging FruitEsolanging Fruit
8,50932674
$endgroup$
CJam, 17 bytes
ri_,(;{1$%!},:+=
Try it online!
answered 28 mins ago
Esolanging FruitEsolanging Fruit
8,50932674
answered 28 mins ago
Esolanging FruitEsolanging Fruit
8,50932674
answered 28 mins ago
Esolanging FruitEsolanging Fruit
8,50932674
answered 28 mins ago
Esolanging FruitEsolanging Fruit
8,50932674
8,50932674
add a comment |
add a comment |
$begingroup$
Javascript, 62
n=>n==[...Array(n).keys()].filter(a=>n%a<1).reduce((a,b)=>a+b)
Explanation (although it's pretty simple)
n=> //return function that takes n
n== //and returns if n is equal to
[...Array(n).keys()] //an array [0..(n-1)]...
.filter(a=>n%a<1) //where all of the elements that are not divisors of n are taken out...
.reduce((a,b)=>a+b) //summed up
Thanks to Jo King for the improvement!
answered 32 mins ago
zeveezevee
22016
$endgroup$
$begingroup$
thanks! Added that in
$endgroup$
– zevee
24 mins ago
add a comment |
$begingroup$
Javascript, 62
n=>n==[...Array(n).keys()].filter(a=>n%a<1).reduce((a,b)=>a+b)
Explanation (although it's pretty simple)
n=> //return function that takes n
n== //and returns if n is equal to
[...Array(n).keys()] //an array [0..(n-1)]...
.filter(a=>n%a<1) //where all of the elements that are not divisors of n are taken out...
.reduce((a,b)=>a+b) //summed up
Thanks to Jo King for the improvement!
answered 32 mins ago
zeveezevee
22016
$endgroup$
$begingroup$
thanks! Added that in
$endgroup$
– zevee
24 mins ago
add a comment |
$begingroup$
Javascript, 62
n=>n==[...Array(n).keys()].filter(a=>n%a<1).reduce((a,b)=>a+b)
Explanation (although it's pretty simple)
n=> //return function that takes n
n== //and returns if n is equal to
[...Array(n).keys()] //an array [0..(n-1)]...
.filter(a=>n%a<1) //where all of the elements that are not divisors of n are taken out...
.reduce((a,b)=>a+b) //summed up
Thanks to Jo King for the improvement!
answered 32 mins ago
zeveezevee
22016
$endgroup$
Javascript, 62
n=>n==[...Array(n).keys()].filter(a=>n%a<1).reduce((a,b)=>a+b)
Explanation (although it's pretty simple)
n=> //return function that takes n
n== //and returns if n is equal to
[...Array(n).keys()] //an array [0..(n-1)]...
.filter(a=>n%a<1) //where all of the elements that are not divisors of n are taken out...
.reduce((a,b)=>a+b) //summed up
Thanks to Jo King for the improvement!
answered 32 mins ago
zeveezevee
22016
edited 24 mins ago
answered 32 mins ago
zeveezevee
22016
answered 32 mins ago
zeveezevee
22016
answered 32 mins ago
zeveezevee
22016
22016
$begingroup$
thanks! Added that in
$endgroup$
– zevee
24 mins ago
add a comment |
$begingroup$
thanks! Added that in
$endgroup$
– zevee
24 mins ago
$begingroup$
thanks! Added that in
$endgroup$
– zevee
24 mins ago
$begingroup$
thanks! Added that in
$endgroup$
– zevee
24 mins ago
add a comment |
If this is an answer to a challenge…
…Be sure to follow the challenge specification. However, please refrain from exploiting obvious loopholes. Answers abusing any of the standard loopholes are considered invalid. If you think a specification is unclear or underspecified, comment on the question instead.
…Try to optimize your score. For instance, answers to code-golf challenges should attempt to be as short as possible. You can always include a readable version of the code in addition to the competitive one.
Explanations of your answer make it more interesting to read and are very much encouraged.…Include a short header which indicates the language(s) of your code and its score, as defined by the challenge.
More generally…
…Please make sure to answer the question and provide sufficient detail.
…Avoid asking for help, clarification or responding to other answers (use comments instead).
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$begingroup$
Wait, so truthy is for values that aren't perfect, and falsey is for values that are?
$endgroup$
– Esolanging Fruit
30 mins ago
$begingroup$
@EsolangingFruit Yes, though the actual output values don't really matter, so you can output true for perfect numbers if you wish
$endgroup$
– Jo King
28 mins ago
$begingroup$
Fair enough, but wording the challenge as "output whether it is not perfect" makes the test cases slightly confusing if you interpret "truthy" as meaning "values corresponding to true".
$endgroup$
– Esolanging Fruit
27 mins ago
$begingroup$
@EsolangingFruit Good point. I've renamed the test cases to
Imperfect/Perfectto make it clearer$endgroup$
– Jo King
25 mins ago