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2022 day 8 init

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Bruno Raoult
2022-12-10 16:53:33 +01:00
parent 9e3a875e37
commit c608f6dcde
7 changed files with 405 additions and 0 deletions
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111
2022/day08/Makefile Normal file
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# AOC daily Makefile - GNU make only.
#
# Copyright (C) 2021-2022 Bruno Raoult ("br")
# Licensed under the GNU General Public License v3.0 or later.
# Some rights reserved. See COPYING.
#
# You should have received a copy of the GNU General Public License along with this
# program. If not, see <https://www.gnu.org/licenses/gpl-3.0-standalone.html>.
#
# SPDX-License-Identifier: GPL-3.0-or-later <https://spdx.org/licenses/GPL-3.0-or-later.html>
#
INPUT := input/input.txt
SHELL := /bin/bash
CC := gcc
BEAR := bear
CCLSFILE:= compile_commands.json
LIB := aoc_$(shell uname -m)
INCDIR := ../include
LIBDIR := ../lib
LDFLAGS := -L$(LIBDIR)
#LDLIB := -l$(LIB) -lm
LDLIB := -l$(LIB)
export LD_LIBRARY_PATH = $(LIBDIR)
CFLAGS += -std=gnu11
CFLAGS += -O2
CFLAGS += -g
# for gprof
# CFLAGS += -pg
CFLAGS += -Wall
CFLAGS += -Wextra
CFLAGS += -march=native
# Next one may be useful for valgrind (some invalid instructions)
# CFLAGS += -mno-tbm
CFLAGS += -Wmissing-declarations
CFLAGS += -Wno-unused-result
CFLAGS += -DDEBUG_DEBUG # activate general debug (debug.c)
CFLAGS += -DDEBUG_POOL # memory pools management
VALGRIND := valgrind
VALGRINDFLAGS := --leak-check=full --show-leak-kinds=all --track-origins=yes \
--sigill-diagnostics=yes --quiet --show-error-list=yes
TIME := \time -f "\ttime: %E real, %U user, %S sys\n\tcontext-switch:\t%c+%w, page-faults: %F+%R\n"
export PATH := .:$(PATH)
.PHONY: clean all compile assembly memcheck memcheck1 memcheck2 part1 part2 ccls bear org
all: README.org ccls part1 part2
memcheck: memcheck1 memcheck2
memcheck1: aoc-c
@$(VALGRIND) $(VALGRINDFLAGS) aoc-c -p 1 < $(INPUT)
memcheck2: aoc-c
@$(VALGRIND) $(VALGRINDFLAGS) aoc-c -p 2 < $(INPUT)
@#@valgrind -s --track-origins=yes aoc-c -p 2 < $(INPUT)
compile: aoc-c
cpp: aoc-c.i
assembly: aoc-c.s
part1: aoc-c
@$(TIME) aoc.bash -p 1 < $(INPUT) 2>&1
@$(TIME) aoc-c -p 1 < $(INPUT)
part2: aoc-c
@$(TIME) aoc.bash -p 2 < $(INPUT) 2>&1
@$(TIME) aoc-c -p 2 < $(INPUT)
ccls: $(CCLSFILE)
clean:
@rm -f aoc-c core* vgcore* gmon.out aoc-c.s aoc-c.i README.html compile_commands.json
aoc-c: aoc-c.c common.c
@echo compiling $<
$(CC) $(CFLAGS) $(LDFLAGS) -I $(INCDIR) $^ $(LDLIB) -o $@
# generate pre-processed file (.i) and assembler (.s)
%.i: %.c
@echo generating $@
@$(CC) -E $(CFLAGS) -I $(INCDIR) $< -o $@
%.s: %.c
@echo generating $@
@$(CC) -S -fverbose-asm $(CFLAGS) -I $(INCDIR) $< -o $@
# generate README.org from README.html (must cleanup !)
org: README.org
%.org: %.html
@echo generating $@. Cleanup before commit !
@pandoc $< -o $@
# generate compile_commands.json
$(CCLSFILE): aoc-c.c Makefile
$(BEAR) -- make clean compile
bear: clean
@touch .ccls-root
@$(BEAR) -- make compile

56
2022/day08/README.org Normal file
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** --- Day 8: Treetop Tree House ---
The expedition comes across a peculiar patch of tall trees all planted
carefully in a grid. The Elves explain that a previous expedition
planted these trees as a reforestation effort. Now, they're curious if
this would be a good location for a
[[https://en.wikipedia.org/wiki/Tree_house][tree house]].
First, determine whether there is enough tree cover here to keep a tree
house /hidden/. To do this, you need to count the number of trees that
are /visible from outside the grid/ when looking directly along a row or
column.
The Elves have already launched a
[[https://en.wikipedia.org/wiki/Quadcopter][quadcopter]] to generate a
map with the height of each tree (your puzzle input). For example:
#+begin_example
30373
25512
65332
33549
35390
#+end_example
Each tree is represented as a single digit whose value is its height,
where =0= is the shortest and =9= is the tallest.
A tree is /visible/ if all of the other trees between it and an edge of
the grid are /shorter/ than it. Only consider trees in the same row or
column; that is, only look up, down, left, or right from any given tree.
All of the trees around the edge of the grid are /visible/ - since they
are already on the edge, there are no trees to block the view. In this
example, that only leaves the /interior nine trees/ to consider:
- The top-left =5= is /visible/ from the left and top. (It isn't visible
from the right or bottom since other trees of height =5= are in the
way.)
- The top-middle =5= is /visible/ from the top and right.
- The top-right =1= is not visible from any direction; for it to be
visible, there would need to only be trees of height /0/ between it
and an edge.
- The left-middle =5= is /visible/, but only from the right.
- The center =3= is not visible from any direction; for it to be
visible, there would need to be only trees of at most height =2=
between it and an edge.
- The right-middle =3= is /visible/ from the right.
- In the bottom row, the middle =5= is /visible/, but the =3= and =4=
are not.
With 16 trees visible on the edge and another 5 visible in the interior,
a total of =21= trees are visible in this arrangement.
Consider your map; /how many trees are visible from outside the grid?/
To begin, [[file:8/input][get your puzzle input]].

17
2022/day08/aoc.h Normal file
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/* aoc.c: Advent of Code 2022
*
* Copyright (C) 2022 Bruno Raoult ("br")
* Licensed under the GNU General Public License v3.0 or later.
* Some rights reserved. See COPYING.
*
* You should have received a copy of the GNU General Public License along with this
* program. If not, see <https://www.gnu.org/licenses/gpl-3.0-standalone.html>.
*
* SPDX-License-Identifier: GPL-3.0-or-later <https://spdx.org/licenses/GPL-3.0-or-later.html>
*/
#ifndef _AOC_H_
#define _AOC_H_
extern int parseargs(int ac, char**av);
#endif /* _AOC_H_ */

68
2022/day08/common.bash Executable file
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#!/usr/bin/env bash
#
# common.bash: Advent of Code 2022, common bash functions
#
# Copyright (C) 2022 Bruno Raoult ("br")
# Licensed under the GNU General Public License v3.0 or later.
# Some rights reserved. See COPYING.
#
# You should have received a copy of the GNU General Public License along with this
# program. If not, see <https://www.gnu.org/licenses/gpl-3.0-standalone.html>.
#
# SPDX-License-Identifier: GPL-3.0-or-later <https://spdx.org/licenses/GPL-3.0-or-later.html>
# shellcheck disable=2034
export cmdname=${0##*/}
export debug=0
export res
export LANG=C
shopt -s extglob
set -o noglob
usage() {
printf "usage: %s [-d DEBUG] [-p PART]\n" "$cmdname"
exit 1
}
checkargs() {
local part=1
while getopts p:d: todo; do
case "$todo" in
d)
if [[ "$OPTARG" =~ ^[[:digit:]+]$ ]]; then
debug="$OPTARG"
else
printf "%s: illegal [%s] debug level.\n" "$CMD" "$OPTARG"
exit 1
fi
;;
p)
if [[ "$OPTARG" =~ ^[12]$ ]]; then
part="$OPTARG"
else
printf "%s: illegal [%s] part.\n" "$CMD" "$OPTARG"
exit 1
fi
;;
*)
usage
;;
esac
done
# Now check remaining argument (backup directory)
shift $((OPTIND - 1))
(( $# > 1 )) && usage
return "$part"
}
main() {
local -i part
checkargs "$@"
part=$?
parse "$part"
solve "$part"
printf "%s: res=%s\n" "$cmdname" "$res"
}

49
2022/day08/common.c Normal file
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/* common.c: Advent of Code 2022, common functions
*
* Copyright (C) 2022 Bruno Raoult ("br")
* Licensed under the GNU General Public License v3.0 or later.
* Some rights reserved. See COPYING.
*
* You should have received a copy of the GNU General Public License along with this
* program. If not, see <https://www.gnu.org/licenses/gpl-3.0-standalone.html>.
*
* SPDX-License-Identifier: GPL-3.0-or-later <https://spdx.org/licenses/GPL-3.0-or-later.html>
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "aoc.h"
#include "debug.h"
static int usage(char *prg)
{
fprintf(stderr, "Usage: %s [-d debug_level] [-p part] [-i input]\n", prg);
return 1;
}
int parseargs(int ac, char **av)
{
int opt, part = 1;
while ((opt = getopt(ac, av, "d:p:")) != -1) {
switch (opt) {
case 'd':
debug_level_set(atoi(optarg));
break;
case 'p': /* 1 or 2 */
part = atoi(optarg);
if (part < 1 || part > 2)
return usage(*av);
break;
case 'i':
default:
return usage(*av);
}
}
if (optind < ac)
return usage(*av);
return part;
}

5
2022/day08/input/example.txt Normal file
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30373
25512
65332
33549
35390

99
2022/day08/input/input.txt Normal file
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