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Solution to day 9, in lex.

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Bert Peters
2017-12-10 13:06:34 +01:00
parent 65a3f8ad81
commit 836274331c
5 changed files with 36 additions and 0 deletions
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2017/day-09/.gitignore vendored Normal file
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solution

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2017/day-09/Makefile Normal file
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CFLAGS=-Wall -Wextra
all: solution

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2017/day-09/input.txt Normal file
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2017/day-09/solution.l Normal file
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%{
#include <stdio.h>
int nest = 0;
int score = 0;
int garbage = 0;
%}
%x GARBAGE
%%
\{ ++nest;
\} score += nest--;
, ;
\< BEGIN GARBAGE;
<GARBAGE>!. ;
<GARBAGE>\> BEGIN 0;
<GARBAGE>. ++garbage;
%%
int yywrap()
{
return 1;
}
int main()
{
yylex();
printf("Groups: %d\nGarbage: %d\n", score, garbage);
}