advent2021

commit 6b31037dba861e5afcf1e7246a6ba4a32aa65675
parent 3cb2fa46a54b8bdfdf7d2c59ad7e3c8c3cf510c7
Author: bsandro <brian.drosan@gmail.com>
Date:   Fri, 10 Dec 2021 20:21:57 +0200

Day 10, puzzle 1

Diffstat:
A
day10/Makefile
 | 
26
++++++++++++++++++++++++++
A
day10/input.txt
 | 
90
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
A
day10/main.c
 | 
30
++++++++++++++++++++++++++++++
A
day10/puzzle.c
 | 
118
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
A
day10/test.txt
 | 
10
++++++++++

5 files changed, 274 insertions(+), 0 deletions(-)
diff --git a/day10/Makefile b/day10/Makefile
@@ -0,0 +1,26 @@
+NAME=$(shell basename ${PWD})
+CC=cc
+SRC=$(wildcard *.c ../common/*.c)
+DEPS:=$(wildcard *.h ../common/*.h)
+OBJ:=$(SRC:.c=.o)
+CFLAGS=-O2 -std=c99 -Werror -Wall -Wextra -I. -I../common
+LDFLAGS=-lc
+
+all: $(NAME)
+
+.PHONY: clean run
+
+clean:
+	rm -f $(OBJ) $(NAME)
+
+%.o : %.c $(DEPS)
+	$(CC) $(CFLAGS) -c $< -o $@
+
+$(NAME): $(OBJ)
+	$(CC) $(OBJ) -o $@ $(LDFLAGS)
+
+run: $(NAME)
+	./$(NAME) input.txt
+
+test: $(NAME)
+	./$(NAME) test.txt
diff --git a/day10/input.txt b/day10/input.txt
@@ -0,0 +1,90 @@
+([<([{{<<(<<{[<><>)}<([][])<<>{}>>>{[{(){}}(()[])]<{()()}<()()>>}>([<<{}<>>(<><>)><[{}[]](<>())>][
+({{<<(<<<<{{[({}{})<[]()>]<([]{}){[]<>}>}{([{}[]]}}}>({(((()()))<{<>()}[<>()]>)[{(<>{})(()[])}[{[]
+[{{[([<({[([<{[]}({}<>)>]{(([]())[()[]]){<[]<>>[<><>]}}>{<[(()<>){[]<>}][[<>{}]<()()>]>[[[<>[]][()
+{(<<{([([<(<{(<>[])<()<>>}>){[[<<>()>[<>[]]]{[{}{}]{[]<>}}]{<{{}<>}{{}()}>{[()()]<[]<>>})}>[{({[{}
+<{<<<<<{{{({<<[][]>[()[]]><<(){}>([]{})>}{{<[]{}><{}[]>}{<{}{}>({}<>)}}){([(()[]){[]()}][<[]()><[]{}>])
+<{({{<{{{<(({(<>)({}[])}{<()>{(){}}})[[(<><>)[[]]]<[{}[]]{<>()}>])>{<<([{}()]{[][]})({{}{}}{()})><
+<([[<<[{[{({{({}<>)[(){}]}{[{}<>]{[]{}}}}({[()()]<<><>>}(<{}[]><[]{}>)))}<({<<[]<>>({}[])>
+[[{<{{[{<{<[{[()[]]<()()>}][<(<>[]){<>()}>[{<><>}(<>())]]><[{{{}<>}<{}{}>}{[{}[]][[][]]}]<[([]<>){[]{}}]<(
+[({[<([[{<[{{(()[])<[]{}>}<[{}<>>{[][]}>}(<<[]{}>([]<>)>[([]){()[]}])]<[[[[]()][<>{}]]<(<>{})((
+<{[[{{{[([([{[<>()]{[]{}}}<{[][]}[<>()]>](<<<><>>{()()}>))<<{{<><>}[{}()]}{(<><>)[<>{}]}>>])]{[<<[<([]
+[[(<<<({[(((([<>()]([]{}))((<>){[]()})})[[<[[]<>]<{}<>>>[<()()>[()<>]]][[[<>{}]{[][]}]]])<<(({{}[
+{{{[[<<{{[{<[[{}()]]>[{[<>[]]([][])}<{{}()}{{}[]}>]}([[{()}{(){}}]([<>{}]<{}<>>)][{{[]<>}}[{{}{}}[{
+{[{[(<{{([{<<<[][]><()<>>>[{{}()}{[]<>}]>({<{}()>[()[]]}<<()[]>([][])>)}{[([[]{}][<><>]){{{}[]}<
+{[({<{[<{{[(({()<>}({}[]))([()]{<>[]}))({{[]{}}<<>[]>>)]{((<()[]>{(){}})[{[]<>}])}}}<[[<<<(){}><()
+[[[[[{{[{<<[<<{}<>>>{<()()><{}[]>}]>(<([()<>}<<>[]>)(((){})<()[]>)><({{}{}}<[]()>)<{{}<>}(
+{{<<[<{(<[([(<{}<>>[[][]])[(()())]]{[([][])({}<>)]<(<>{}){[][]}>})([{(<>{})<()<>>}])]>(([[[(<>{})](<[]
+<<([{<(<{({<{({}<>)<()()>}{<<>[]>[{}{}]}>(<((){})>(<[]()>[<><>]))}<<(([])[()])<([][])(()<>)>>>)([{([<>{}]([]<
+{[[{{[[({{[([{<>[]}[{}[]]]){(<[]{}>[()()]){[<>{}][<>]>}]}{<{<<{}()>({}())>}{[[<>[]]{<>{}}]<[{}[]]{{}{}}>}
+{<[[{({<{<[<(<(){}><<>{}>)>{[[(){}]]{({}())({}[])}}]{[{{(){}}}]}>}(<{{{([]{})[{}<>]}(<<>{}>)}(
+<[[<(<([[({(<{<>()}([][])><(<>[])[<>{}]>)((<<>()>[[]()])<{()<>}<()()>>)}>[[({{{}<>}[[]<>]}
+<{([{({[[({([[{}()]<()()>][<()[]>[[]<>]]}([<(){}>{<><>}][<{}<>><<>{}>])}[(([<>[]][<>[]])){
+<{[<(<(<[[[{[{<>{}}]((())({}()))}][(([{}<>]{{}{}}))[{[[]()]((){})}<[<>[]]([][])>]]]][[((({
+({[<<([[[<[[<(<>{}){{}[]}>[((){})[<><>]]][{{<>{}}{(){}}}(<[]{}}({}<>))]]{((<{}[]>({}<>))<<<>{}>[[]{}]>)[((
+{[<<[([[([{<<[{}{}]({}[])><<{}<>)(<>[])>>[([()()]{<><>}){[[]{}]{(){}}}]}{<([<>]([]())){<(){}>{()<>}}><<{
+[<[[[[({{([{{(<>[])<<><>>}<{[]{}}<<>>>}(<{[]{}}<<>()>>)][{(<<><>><()[]>){[{}()]>}<[{{}{}}{<>[]}]>]
+{<{[<(([{{({[<<>[]><{}[]>]<{<>{}}{()()}>}([<{}{}>{[]<>}]{<{}<>><[]>}))<([([]<>){[]{}}]<{[]<>}
+[<<(({<<[{[([[<>]<()[]>]{[[]<>]{()<>}}){{<<><>>{[]<>]}[({}<>){()<>}]}](<{{()[]}}({{}[]}<{}[
+({(<{<{<([([[((){})<{}<>>]<[{}[]](<>{})>])])<<[{<<<>[]>>}<[(<><>){<>{}}][(()[])(<>{})]>]<(<{<>{}}
+([<{<<[([({<<<()()>(())><[[]<>]{<>[]}>>([(()())]{[[]()]<{}<>>})})[<[[(()<>){<>{}}]][<(<><>){<>[]}>]><<([{}
+([[<[[[({[<<[[{}()](()<>)]<{()[]}>>{<[{}<>]<()[]>><<[][]>>}>]<(<<[{}<>){<>}>{<[]()>[[][]]}>)>}({
+(<[(<[([<{<{<[(){}][<>()]><(<>())(()<>)>}{{[{}>([]<>)}[<<>{}>(()())]}>[{([<><>]<()()>)}{([()]{()<
+({{{{<[{{<{<<(()[])>{[(){}]{[]{}}}>}{{([<><>][<><>])<(()<>)[[][]]>}<<(()<>)><{<>()}>>}>}}][(<{(<[{<><>}[{}[
+<{[{((([({{({<()()>(())}){([()<>]((){}))<(()<>)[(){}]>}}{[{([]())((){})}[{[]<>>{<>{}}]]<<<()[]><()<>>>((()()
+{([({[(<[<([{[<>[]][()<>]}{[(){}]{{}<>}}][<<{}()>>[<<>()>[()}]])<((({}{})[[]<>]))<{[[]{}]([]<>)}>>><{
+([[[{<[<([{(<<<>()>({}<>)><[<>{}]>)[[<<><>><()[]>](<()<>>(<>[]))]}([({()()}([]())){<[]{}>[[]<>]}][<
+<<((<({{(<((<({}[])(<>())>{({}[])({}<>)}))<<<([]<>)[()[]]>{<()<>>[[]<>]}>>)({(<[<>{}]((){})><{()()}[{}(
+{({([(({{<{{{<[]()>{{}[]})[[(){}](()<>)]}(([[]{}]{()<>}))}>{(<[{()()}]{[<>[]][()()]}>{{<()()
+{[(<{<[<<[{<<<<>{}>>[[[]{}]<<>()>]>((<[]{}>{{}()}))}{({[{}()](()<>)}<<[][]>[{}<>]>)({[{}[]]}<<{}[]
+{{{<{<{[[{([{{[]()}}({()[]}(<>))]<((<><>)({}{}))>)}]]{[({<(<{}[]>{<>{}})((()<>)([]()))>})[<[[{<>{}}<<><>>]<{<
+[[<{<<[(<<<([<{}()>[{}()]](<{}[]>[{}()]))[([[]<>][{}{}])[<[]()><[]()>]]><[[[[]<>]({}{})][{[]}{<>[]}]][<[<>
+(<<<<(<<[<[(({[]()}[[]<>]))({(())(()[])}[<<>[]>{()[]}])]{<({{}{}}(<>{}))><[[<>[]]<[]()>]>}>{({{(<>()){
+<<(<[(<<<{({[<()>{()()}][([]{})([][])]}{({{}}{<>{}})<(())[{}()]>})}[[{<[[][]]{()}){[{}<>]<{}(
+<<{<{{[<[(({({[][]}<<><>>)}<((<><>)[{}[]])<<[]<>>>>)[{{[()[]][[]<>]}{({}())<(){}>}}])({[([[]<>](<><>))<
+<<{<[(<(<([[{{()()}{<>()}}(<<>()>({}[]))]<<{{}{}}{()<>}>(({})(()()))>])[[([(<>[])(<>)](<(){
+({[((({[([<{[{<><>}[()[]]][{[][]}{(){}}]>>(<{{[]{}}<()[]>}<{()<>}<[]()>>>[{({}<>)<{}()>}])])]<(<{{{<[]()
+<[{<<{<<{<(({[<><>]{{}<>}})){<[{<>[]}({}{})]([{}()]{<>()})>[<{<><>}<<>{}>}([<>[]]<[]()>)]}>(
+(<<(({<<(<(({[<>[]]<[][]>}({<>()}[[]()])){((<>[])){([]{}){[][]}}}){{[[[]{}][{}[]]][<{}[]>([]<>)]}[(({
+<(<(<<<[<{({([<>()])[[[][]]{<>[]}]}[<[()]<{}<>>><[(){}]<()()>>])((<(()[])<{}{})>)((([][]))))}>]<[<([[<<>()
+{{<[<<<{((([[([]{})][[<>[]]]])(<[[(){}]<<>[]>]>{[({}())([]<>)][<<>{}><[]()>]}))){{<[[[[][]
+{([<{[<<[{({({<>{}}[[][]])[{(){}}{{}()}]}[[[{}()]<()()>]])({<[{}{}]>({{}{}}[[]{}])}{{({}())<()()>}{{<><>}<[]
+[<{[{<{{<{<[{{{}{}}[[]()]}([{}[]]<{}()>)](<{()()}{<>[]}><(<>[])>)>}{{{((()<>)[<><>])[[()()]
+([{[<[({([<<<([][])<{}{}>>[[()<>](<>{})]>{{({}<>)}([<><>]<()<>>)}>](<(<<[]<>>({}[])>[<<>{}>[()()]])(<<()[]>((
+(<[{<({<([<({<<>()><{}()>}(<[]{}>({}<>)))[([[]()][<><>>){[<>[]]{{}<>}}]>({[{[]{}}({}[])]<{[
+<<[<(<({<(<({<()><[]()>})>{[{[[]()]<{}>}<(()<>)(<>())>)(((()())[<><>])([(){}]))})([(<{<>()}([]())>{[{}{
+[{<{<{<[<((({[()[]]{{}}}[[<><>]<<>{}>])<({[][]}{()[]})<([]())([]{})>>))((<([{}<>]{(){}})>[
+[[[[([<{[[(<{{{}[]}[<>()]}<{[]}{<><>}>><{({}<>){()<>}}[{[]{}}{<>[]}]>)[([({}<>}([]<>)]{{{}{}
+<{{[[<{[(({({<{}>[(){}]}(<[]()>))}<<<[{}{}]>(<[]{}>(<>[]))>([{{}<>}(()())]<{<><>}{<>()}>)>)<[<<
+{[{{{(<<([([((()[])[[]<>])({{}{}}({}<>))]<({{}[]}{[][]})<{[][]}>>){<<({})[[]<>]>(<[][]>(<>{}))>}]<[
+<[<(<{<[([[[{[()[]][<>{}]}[{(){}}{<><>}]]{<([]{}){()<>}>[({}<>)<<>[]>]}][<[({}[]){()[]}][<<>{}><()<>>]>]]<(
+([<{(([[<<{([([]{})([]())]<{(){}}{[]<>}>)([<<>{}>[()()]]{[[]{}]<[]<>>})}[({{()()}<<>{}>>){[<()
+([({{{[[[([{<{<><>}{()()}>(<[]())[<>])}{([<><>]<(){}>){(<>())[{}()]}}]<{[[<><>]{{}[]}]([{}<>]{[]()
+[[<<<{{({[{[({{}{}}<(){}>)<[[]{}]({}<>)>]}][(<{<<>{}>}{{[]{}}{()[]}}>[{[<>{}]<[][]>}<{<><>
+[([{(([{(([{[{[]()}[{}]][[[]<>]{<>{}}]}{[<{}{}>({}[])][<<><>>(()<>)]}]{<({[]{}}{<>{}}}>}){
+(<<<<<[{<{({({[]{}}({}())){([][])[{}{}]}}([{<><>}{{}{}}][[{}[]]({}{})]))[[[{{}()}[<>{}]][{{}<>}{()}]
+(([{<(<[(<{{{[[]<>](<>[])}{[()<>]<()()>}}}>)<{{({<{}<>>[{}{}]}({<>[]}[()()]))}([([<>[]][[]{}])(<<><>
+((<{[(([{{([<[<>()]<<>[]>>{((){})([])}][<{[]()}<<>()>>(<{}()>(<>))])}[{{{{[]()}}{(<>[])[()<
+<[[{{[<<({[<<{(){}}{(){}}>>(<{[]<>}<<>()>>({()<>}{{}<>}))]{[([[][]][{}<>])][((<>{})(()[]))[<()[]>{<>()}]]}
+{<{<<[{[([{{{{{}()}<()<>>}<[()[]]>}<[<[]<>><()<>>](({}())<{}>)>}<<({[]()}(()()))({{}<>}{{}<>
+{{[<{[<{[[{{({[]<>}<{}[]>)((<>{})({}{}))}([[[]{}]<{}[]>]<({}()){()<>}>)}[<([{}<>}<<><>>)><{[()[]][<>[]]}{
+([{{{[{(<<<[<{<>[]}{()[]}>(([]())<<>{}>)]>[[(<{}()><[]<>>)][{[[][]]<(){}>}<<()()>({}[])>)]>>)<<[[(<(<>())((
+<({[{{(({(<<<{[]()}(<>{})>{(()<>)[[]<>]}><[[<>()]]{([]{})[[]()]}>>)})({[{<(<[]<>>{{}[]])[<<>{}>[(){}]]><(({}(
+((<(([{([{<[{<[]()>(()[])}<({})[<>[]]>]>}]{[<<{[[]()]<<>()>)<<{}[]>{<><>}>>>[[([(){}](<>[]))]{{<
+[([<<([(<[<<([[]{}]<(){}>)([()[]][{}{}])>([([]<>)<(){}>]([[][]]{[]<>}))>{{[{[]<>}[{}[]]]{([]
+[<{<[[<{<({<[<()<>><[]<>>][<{}<>><<>()>]><{((){})(()())}>}{[([{}<>]({}{})){(<>{})}]([[<><>](<>)])})><{<{
+[(<[[<({{<<([<(){}><<><>}]<<{}()>({}<>)>){[(<>())[(){}]]<<<><>>[{}<>]>}><{[{(){}}][<{}{}>[()(
+<[<{[{{<([{<[{()<>}{()<>}]]{<[{}<>](<>{})>([{}<>]{{}()})}}<[([(){}](()[]))<{{}{}}>]{{{<>}<[
+(<{[[{[[{[[(<[[][]][<>{}]>(<()<>>(<>{})))[{([]{}}<{}[]>}[[[]{}]{()()}]]]{<[<<>{}>(()<>)]<{{}<>}<[
+(<<<[[(<{<({{(<>())<(){}>}<(()())<()[]>>}<[({}{})[()[]]]>)>}{<{[<[()<>][<>[]]>[([]{})(()())]][({{}{}}
+({({[[[(<<[{<<<>[]][{}()]>(({}())([]()))}]{<{[()[]]({}())}>({<()[]><[]{}>}[{<>()}<[]{}>])}>>)]]]}[({[[{({(((
+((([[<{[(<({<{<><>}[[]]>[{(){}}>}((<()<>>{()()})<<<>()>({}())>))((([<>()]{[][]})[[(){}]<{}
+<[{([(<[({[[([{}()]({}{}))([<><>]({}()))](({(){}}{()[]}><[[]()]<<><>>>)](<([(){}][{}{}])[{
+{<((({<((<[[<{()[]}<{}{}>>](<<[]>{<>}><[[]{}]({})>)]<<{[{}{}]}[{<>{}}}>>><(([<<>>(()())]<(
+{[[[<<(<{(<(<[{}<>]<[]()>>[{{}{}}{()<>}])[<{{}()}{{}{}}><{[]<>}({}())>]>)<<(<<()<>><<><>>>)>>}[(
+[<{<[([({([[[{{}()}{{}()}]([[]()])]])}<<<[<<<>{}>[<><>)><{[]<>}(()<>)>](({{}<>}[()<>]){{<>[]}((){})})>({(
+([[{{[[[<(<({(()())<{}[]>}<({}<>){[][]}>)[<{()()}[[]<>]>]>)([[({<>[]}[()()])[{[]<>}[{}{}]]][[<
+({[(<<<{((<{<[()()][[]<>]>{<{}<>><()()>}}<{[()[]]([]<>)}<<{}()><{}{}>>>>[<<{(){}}[()[]]>[([]<
+([({{{<[{[{{[([]{})<[]{}>][<<>[]>[{}[]]]}}[{[<<><>>{[][]}]((<>()){<>{}})}]]]][[(<({[[]()][[]{}]
+(((<{{<<<([[{(<><>)<{}>}<{{}{}}[{}<>]>]{[(()())[{}<>}]}]{<(<[]()>)>([<()[]>{{}()}]<({}()){(){}}>)})<[({(<>()
+[{(([[<(<<(<{<[]()>(<>{})}[{()[]}[()()]]><[<[]()>[[]<>]]>)<{<[[]<>]<()<>>>{[()[]]<{}[]>}}>>([((<[][
+{<{<{[([(<<[{<()<>>(<>[])}[(<><>)[[]<>]]]<<<[]<>><(){}>>{{{}<>}<<><>>}>>(<{{<>()}[()<>]}><[
diff --git a/day10/main.c b/day10/main.c
@@ -0,0 +1,30 @@
+#include <stdio.h>
+#include <time.h>
+#include <string.h>
+
+void puzzle(const char *filename, long long *res1, long long *res2);
+void puzzle_test(const char *filename, long long *res1, long long *res2);
+
+int main(int argc, char *argv[]) {
+	printf("Advent of Code: day 10\n");
+	double time_start = clock();
+
+	if (argc <= 1) {
+		printf("Usage: %s inputfile.txt\n", argv[0]);
+		return -1;
+	}
+
+	const char *filename = argv[1];
+	long long counter1 = -1;
+	long long counter2 = -1;
+
+	puzzle(filename, &counter1, &counter2);
+
+	printf("Puzzle #1: %lld\n", counter1);
+	printf("Puzzle #2: %lld\n", counter2);
+
+	double elapsed = clock() - time_start;
+	printf("Elapsed: %f\n", elapsed / CLOCKS_PER_SEC);
+
+	return 0;
+}
diff --git a/day10/puzzle.c b/day10/puzzle.c
@@ -0,0 +1,118 @@
+#define _DEFAULT_SOURCE
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+#include <strings.h>
+#include <stdbool.h>
+#include <assert.h>
+#include <time.h>
+#include <inttypes.h>
+#include <ctype.h>
+
+#include "util.h"
+
+#define STR_LEN 1024
+
+// simple stack operations on array_t
+void array_push(struct array_t *array, char bracket);
+char array_pop(struct array_t *array);
+
+char validate_string(const char *str);
+
+void puzzle(const char *filename, long long *result1, long long *result2) {
+	FILE *infile = fopen(filename, "r");
+	if (infile == NULL) {
+		fprintf(stderr, "fopen() error: %s\n", strerror(errno));
+		return;
+	}
+
+	char buf[STR_LEN] = {0};
+	unsigned int line_num = 0;
+
+	*result1 = 0;
+	*result2 = 0;
+
+	while (fgets(buf, STR_LEN, infile) != NULL) {
+		char illegal = validate_string(buf);
+		if (illegal != 0) {
+			switch (illegal) {
+			case ')':
+				*result1 += 3;
+				break;
+			case ']':
+				*result1 += 57;
+				break;
+			case '}':
+				*result1 += 1197;
+				break;
+			case '>':
+				*result1 += 25137;
+				break;
+			}
+		}
+
+		++line_num;
+		bzero(buf, STR_LEN);
+	}
+
+	// mutiny! ignoring feof/ferror.
+	fclose(infile);
+}
+
+char validate_string(const char *str) {
+	size_t len = strlen(str);
+	assert(len > 2); // at least 2 characters + EOL
+	struct array_t brackets = { .data = NULL };
+	array_init(&brackets, sizeof(char), 10);
+
+	for (size_t i = 0; i < len; ++i) {
+		char c = str[i];
+		switch (c) {
+		case '{':
+			array_push(&brackets, '}');
+			break;
+		case '(':
+			array_push(&brackets, ')');
+			break;
+		case '<':
+			array_push(&brackets, '>');
+			break;
+		case '[':
+			array_push(&brackets, ']');
+			break;
+		case '}':
+		case ')':
+		case '>':
+		case ']': {
+			char expected = array_pop(&brackets);
+			if (c != expected) {
+				return c;
+			}
+			break;
+		}
+		case '\n':
+			// do nothing
+			break;
+		default:
+			printf("invalid symbol: %c (#%d)\n", c, c);
+		}
+	}
+
+	free(brackets.data);
+	return 0;
+}
+
+void array_push(struct array_t *array, char bracket) {
+	if (array->count >= array->cap) {
+		array_expand(array);
+	}
+	char *data = (char *)array->data;
+	data[array->count++] = bracket;
+}
+
+char array_pop(struct array_t *array) {
+	char *data = (char *)array->data;
+	return data[--array->count];
+}
diff --git a/day10/test.txt b/day10/test.txt
@@ -0,0 +1,10 @@
+[({(<(())[]>[[{[]{<()<>>
+[(()[<>])]({[<{<<[]>>(
+{([(<{}[<>[]}>{[]{[(<()>
+(((({<>}<{<{<>}{[]{[]{}
+[[<[([]))<([[{}[[()]]]
+[{[{({}]{}}([{[{{{}}([]
+{<[[]]>}<{[{[{[]{()[[[]
+[<(<(<(<{}))><([]([]()
+<{([([[(<>()){}]>(<<{{
+<{([{{}}[<[[[<>{}]]]>[]]