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Posts by Lundin‭

55 posts
83%
+8 −0
Challenges Integer to Roman numeral

The task is to take a decimal integer as input and print the corresponding Roman numeral with capital letters. The program must handle all positive integer numbers between 1 and 1000. Input can be...

3 answers  ·  posted 3y ago by Lundin‭  ·  last activity 3y ago by Lundin‭

Question code-golf
81%
+7 −0
Challenges Output 256 in many different ways

C, 8 solutions Standard C, no extensions. 1 solution snippet per line: "llll"[3]^33^333 4*4*4*4 5555-555-555-555-555-555-555-555-555-555-55-55-55-55-55-5-5-5-7-7 6666/26 (int){8<...

posted 3y ago by Lundin‭

Answer
80%
+6 −0
Challenges Keyword golfing

Many programming languages have the concept of keywords, special syntax items that are not just identifiers reserved by some library, but words reserved by the language itself. The challenge is to...

6 answers  ·  posted 2y ago by Lundin‭  ·  last activity 7mo ago by H_H‭

Question code-golf
80%
+6 −0
Challenges Golf golf challenge

The task is to create a program which displays a golf score as text. It takes 2 numbers as input, separated by space or new line: The first number is the par of the specific hole. The second nu...

5 answers  ·  posted 2y ago by Lundin‭  ·  last activity 2y ago by radarek‭

Question code-golf
80%
+6 −0
Meta Reactions on Code Golf Codidact

None of these are applicable at least not for Code Golf challenges. I think this community should "opt out" of reactions unless we can come up with more relevant ones. "Works for me". Answers ...

posted 2y ago by Lundin‭

Answer
80%
+6 −0
Meta Can we have [popularity-contest]s?

Well... maybe not in combination with a code golf challenge, but more like an artistic challenge with some theme, similar to screenshot of the month? For reference see for example Outdoors photo co...

posted 2y ago by Lundin‭

Answer
77%
+5 −0
Meta What are the rules of programming language compliance?

Code Golf seems like a fun idea to me, since I'm a programmer by trade and "language lawyer" nerd as a hobby. But every time I checked the code golf site on SE, I dismissed it as nonsense, because...

2 answers  ·  posted 3y ago by Lundin‭  ·  last activity 3y ago by Quintec‭

Question support discussion
77%
+5 −0
Challenges Make $2 + 2 = 5$

C (gcc), 30 bytes f(x,y){return x+y|!(x^y|x^2);} Try it online! In case the "preferably on a function" requirement can be dropped, then #define f(x,y)x+y|!(x^y|x^2) is 28 bytes.

posted 2y ago by Lundin‭  ·  edited 2y ago by Lundin‭

Answer
75%
+4 −0
Challenges Reverse an ASCII string

C (gcc), 62 bytes main(){char b[99],*p=strchr(gets(b),0);for(;p-->b;)putch(*p);} This relies on the usual gcc extension abuse. It assumes that max user input is 98 characters + null term, si...

posted 3y ago by Lundin‭  ·  edited 2y ago by Lundin‭

Answer
75%
+4 −0
Challenges Can you give me half?

C (gcc), 8 7 unique cos(cos-cos)/(cos(cos-cos)-(-cos(cos-cos))) Try it online! -1 unique character thanks to @orthoplex‭

posted 2y ago by Lundin‭  ·  edited 1y ago by Lundin‭

Answer
75%
+4 −0
Challenges Truthify an array

C (gcc), 100 bytes i,j;f(x,y,p)int*p;{puts("[");for(;i<x;i++)for(j=0;j<y;j++)*p++&&printf("[%d,%d],",i,j);puts("\b]");} Try it online! Note that TIO console doesn't handle back...

posted 3y ago by Lundin‭  ·  edited 3y ago by Lundin‭

Answer
75%
+4 −0
Challenges Operation "Find The Operator"

C (gcc), 147 151 bytes #define L(X)X(+,a+b)X(-,a-b)X(*,a*b)X(/,b&&a/b)X(%,b&&a%b)X(^,pow(a,b)) #define M(o,d)printf("%s",d==c?#o" ":z++==5?".":""); z;s[99];f(a,b,c){L(M)} Tr...

posted 2y ago by Lundin‭  ·  edited 2y ago by Lundin‭

Answer
75%
+4 −0
Meta Default Rules: Code Golf I/O

Command-line arguments may be used as input instead of stdin Languages/systems that support reading input from command-line arguments may use those as input instead of reading from stdin.

posted 2y ago by Lundin‭

Answer
71%
+3 −0
Q&A Hosting fastest code challenges

If restricting everyone to the same system, then can force every contestant to use https://tio.run and the on-site bench-marking found below "debug" -> "real time" as efficiency metric. Example....

posted 9mo ago by Lundin‭

Answer
71%
+3 −0
Sandbox Keyword golfing [FINALIZED]

posted 2y ago by Lundin‭  ·  edited 9mo ago by trichoplax‭

71%
+3 −0
Sandbox Golf golf challenge [FINALIZED]

posted 2y ago by Lundin‭  ·  edited 9mo ago by trichoplax‭

71%
+3 −0
Challenges Guess the language! (Cops' Thread)

C or C++ (gcc) 220 bytes, cracked by Razetime %: %: define cops(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t) if(not false and k%:%:f%:%:d%:%:l(& (not true) <:%:i%:j%:k%:l" "%:m" "%:n%:o%:p%:...

posted 2y ago by Lundin‭  ·  edited 2y ago by Lundin‭

Answer
71%
+3 −0
Challenges "Hello, World!"

LOLCODE, 37 bytes HAI 1 VISIBLE "Hello, World!" KTHXBYE Try it online!

posted 3y ago by Lundin‭

Answer
71%
+3 −0
Sandbox Integer to Roman numeral

posted 3y ago by Lundin‭  ·  edited 3y ago by Lundin‭

71%
+3 −0
Challenges 1, 2, Fizz, 4, Buzz!

C (gcc), 108 bytes *h,i;main(){for(;i++<100;){char s[]="%dFizzBuzz ",b=i%5;h=s+2;printf(s+(i%3?b?*h=32,0:6:b?h[1]=32,2:2),i);}} Godbolt. Works on clang too. Contains some serious abuse of al...

posted 3y ago by Lundin‭  ·  edited 3y ago by Lundin‭

Answer
66%
+2 −0
Challenges Repeat the characters

C (gcc), 56 bytes i;f(s,n)char*s,n;{for(;*s;s++)for(i=n;i--;putchar(*s));} Try it online! My attempt at recursion ended up at 61 bytes: o;f(s,n)char*s,n;{for(o=n;*s&&n--;putchar(*...

posted 2y ago by Lundin‭

Answer
66%
+2 −0
Challenges "Hello, {name}!"

C (gcc), 43 bytes a[99];main(){printf("Hello, %s!",gets(a));} Try it online!

posted 2y ago by Lundin‭

Answer
66%
+2 −0
Challenges In The Jailhouse Now

C (gcc), 119 118 116 115 bytes #define p(x,y,z) printf(i^1?i^c?#z:#y:#x) i,j;f(c){for(i=1;i<=c;p(╗\n,╝\n,╣\n),i++)for(j=p(╔,╚,╠);j++<c;)p(╦,╩,╬);} Try it online! Function solution. I...

posted 2y ago by Lundin‭  ·  edited 2y ago by Lundin‭

Answer
66%
+2 −0
Challenges 99 Shortened Bottles of Beer

C (gcc), 244 bytes main(){for(char*w=" bottles of beer on the wall",i=100;--i;)printf("%d%.*s%s, %d%.*s%.8s.\n%s, %d%.*s%s.\n\n",i,i-1?8:7,w,w+8,i,i-1?8:7,w,w+8,i^1?"Take one down and pass it ar...

posted 2y ago by Lundin‭  ·  last activity 2y ago by Lundin‭

Answer
66%
+2 −0
Sandbox The Tannenbaum series

posted 3y ago by Lundin‭

Article code-golf