Minor fixes + alt code in 1990/baruch

Fixed formatting in README.md.

Add alt code based on authors' suggestion except that the string
replacement was not done because it seems like the output would be not
better but worse. There's a joke in the alternate code section of the
README.md file.
This commit is contained in:
Cody Boone Ferguson committed 2023-04-09 03:54:01 -07:00
1 parent d83e53d44b
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@@ -112,8 +112,8 @@ OBJ= ${PROG}.o
DATA= DATA=
TARGET= ${PROG} TARGET= ${PROG}
# #
ALT_OBJ= ALT_OBJ= ${PROG}.alt.o
ALT_TARGET= ALT_TARGET= ${PROG}.alt
################# #################
+69 -41
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@@ -1,25 +1,59 @@
# Best Small Program # Best Small Program
Doron Osovlanski Baruch Nissenbaum
CADTECH - CAD/CAM Systems Ltd Tel-Aviv University
24 Ben-Yosef st. The Faculty of Engineering
Givat-Shmuel 51905 Tel-Aviv
Israel Israel
Baruch Nissenbaum Doron Osovlanski
Tel-Aviv University CADTECH - CAD/CAM Systems Ltd
The Faculty of Engineering 24 Ben-Yosef st.
Tel-Aviv Givat-Shmuel 51905
Israel Israel
## To build: ## To build:
make all ```sh
make all
```
## To run: ## To run:
echo 4 | ./baruch ```sh
echo 7 | ./baruch echo 4 | ./baruch
echo 7 | ./baruch
```
## Try:
```sh
echo 2 | ./baruch
echo 3 | ./baruch
```
Why is there no output?
### Alternate code:
[Cody Boone Ferguson](/winners.html#Cody_Boone_Ferguson) provided alternate code
for users using Turbo-C or MSC, based on the authors' comments below, except
that he did not change the `" #Q"` string as that showed worse looking output
instead of improved output though he has no way to test the compilers in
question. YMMV. Thank you Cody (though we all think <strike>[no
one](https://en.wiktionary.org/wiki/no_one#Pronoun)</strike> [very
few](https://en.wikipedia.org/wiki/0)
[users](https://en.wikipedia.org/wiki/Microsoft_Windows)
[here](https://www.ioccc.org) will need it :-) )!
To compile:
```sh
make alt
```
Use `baruch.alt` as you would `baruch`.
## Judges' comments: ## Judges' comments:
@@ -30,44 +64,38 @@ added a final newline to the file to make unpacking easy.
## Authors' comments: ## Authors' comments:
The goal of this work was to write a program that solves the The goal of this work was to write a program that solves the classic [n-queens
classic n-queen problem, with a board size of up to 99x99, while problem](https://en.wikipedia.org/wiki/Eight_queens_puzzle), with a board size
keeping the program as short as possible. of up to 99x99, while keeping the program as short as possible.
The program finds all possibilities to place N chess queens on The program finds all possibilities to place N chess queens on a NxN
a NxN chess board so that no queen is in range of any other queen [chessboard](https://en.wikipedia.org/wiki/Chessboard) so that no queen is in
(not in the same column row or diagonal). For each solution the range of any other queen (not in the same column row or diagonal). For each
chess board and the place of the queens is printed to stdout. solution the chess board and the place of the queens is printed to stdout.
This program is about as simple and as readable as possible. To make things
even more simple we used a very limited subset of C:
This program is about as simple and as readable as possible. - No pre-processor statements
To make things even more simple we used a very limited subset of C: - Only one, harmless, `for` statement
- No `if`s
No pre-processor statements - No `break`s
Only one, harmless, 'for' statement - No `case`s
No ifs - No functions outside the standard C library
No breaks - No `goto`s
No cases - No structures
No functions
No gotos
No structures
In short, it contains no C language that might confuse the
innocent reader. :-)
In short, it contains no C language that might confuse the innocent reader. :-)
This program demonstrates the claim that in C, any program This program demonstrates the claim that in C, any program
can be written using a single 'for' statement, as long as it is can be written using a single 'for' statement, as long as it is
long enough.. long enough..
The authors' further note: ### For PC users:
For PC users: In order to compile the program under Turbo-C or MSC, `'int '` should be inserted
at the beginning of the program. For better looking results it is recommended
In order to compile the program under Turbo-C or MSC, 'int ' to replace the `" #Q"` string with `" \261\2"`.
should be inserted at the beginning of the program.
For better looking results it is recommended to replace the " #Q"
string with " \261\2".
## Copyright and CC BY-SA 4.0 License: ## Copyright and CC BY-SA 4.0 License:
+1 -1
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@@ -2,5 +2,5 @@ int v,i,j,k,l,s,a[99];
main() main()
{ {
for(scanf("%d",&s);*a-s;v=a[j*=v]-a[i],k=i<s,j+=(v=j<s&&(!k&&!!printf(2+"\n\n%c"-(!l<<!j)," #Q"[l^v?(l^j)&1:2])&&++l||a[i]<s&&v&&v-i+j&&v+i-j))&&!(l%=s),v||(i==j?a[i+=k]=0:++a[i])>=s*k&&++a[--i]) for(scanf("%d",&s);*a-s;v=a[j*=v]-a[i],k=i<s,j+=(v=j<s&&(!k&&!!printf(2+"\n\n%c"-(!l<<!j)," #Q"[l^v?(l^j)&1:2])&&++l||a[i]<s&&v&&v-i+j&&v+i-j))&&!(l%=s),v||(i==j?a[i+=k]=0:++a[i])>=s*k&&++a[--i])
; ;puts("");
} }