generated from blizzardfinnegan/advent-of-code
Include Day02 instructions, and start day03
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28
day02/part2Instructions.txt
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day02/part2Instructions.txt
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--- Part Two ---
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While it appears you validated the passwords correctly, they don't seem
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to be what the Official Toboggan Corporate Authentication System is
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expecting.
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The shopkeeper suddenly realizes that he just accidentally explained
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the password policy rules from his old job at the sled rental place
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down the street! The Official Toboggan Corporate Policy actually works
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a little differently.
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Each policy actually describes two positions in the password, where 1
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means the first character, 2 means the second character, and so on. (Be
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careful; Toboggan Corporate Policies have no concept of "index zero"!)
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Exactly one of these positions must contain the given letter. Other
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occurrences of the letter are irrelevant for the purposes of policy
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enforcement.
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Given the same example list from above:
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* 1-3 a: abcde is valid: position 1 contains a and position 3 does
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not.
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* 1-3 b: cdefg is invalid: neither position 1 nor position 3 contains
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b.
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* 2-9 c: ccccccccc is invalid: both position 2 and position 9 contain
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c.
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How many passwords are valid according to the new interpretation of the
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policies?
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day03/CMakeLists.txt
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day03/CMakeLists.txt
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#Minimum CMake version
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CMAKE_MINIMUM_REQUIRED(VERSION 3.10)
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#Export compile commands for ccls Language Server
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SET(CMAKE_EXPORT_COMPILE_COMMANDS ON)
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#Specify C standard as ANSI
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SET(C_STANDARD 90)
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#Specify project name, and that C is language
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PROJECT(day03 C)
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#Part 1 Executable
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ADD_EXECUTABLE(Part1 src/part1.c)
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#Part 2 Executable
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#ADD_EXECUTABLE(Part2 src/part2.c)
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day03/data/input.txt
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day03/data/input.txt
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....#.......#.#............#...
|
||||||
|
#....#...........###...........
|
||||||
|
#..#...#...#......#.#..#.......
|
||||||
|
...............................
|
||||||
|
#........##.............#.#....
|
||||||
|
.............#........#....#.##
|
||||||
|
........##.####.....##..#......
|
||||||
|
#.#.#.#.......##....##.....#...
|
||||||
|
.......#..##..#...#............
|
||||||
|
..........#...#....#..#.#.#.##.
|
||||||
|
...#........##....#...#........
|
||||||
|
#..#.##....#....#........#.....
|
||||||
|
.##...#.....##...#.............
|
||||||
|
.#...#..#.#.....#.##.....#.....
|
||||||
|
...........#.............#...#.
|
||||||
|
.#..#................#...#..#..
|
||||||
|
#..........#......##..##....#..
|
||||||
|
####..#...........#.#....#.....
|
||||||
|
..#.#.##..#...##........#....##
|
||||||
|
.#.......##........#.....#.....
|
||||||
|
............#................#.
|
||||||
|
.#...#...#.....#.#....#.##..#..
|
||||||
|
..#.............#.#....#.#.....
|
||||||
|
..............#...........#....
|
||||||
|
..............#........#....#..
|
||||||
|
..........##........#..#...#...
|
||||||
|
...#.#....#.#....#..#.....#...#
|
||||||
|
..#......#...........#..#..#.#.
|
||||||
|
.....##.....#.####....#........
|
||||||
|
|
||||||
11
day03/data/testInput.txt
Normal file
11
day03/data/testInput.txt
Normal file
|
|
@ -0,0 +1,11 @@
|
||||||
|
..##.......
|
||||||
|
#...#...#..
|
||||||
|
.#....#..#.
|
||||||
|
..#.#...#.#
|
||||||
|
.#...##..#.
|
||||||
|
..#.##.....
|
||||||
|
.#.#.#....#
|
||||||
|
.#........#
|
||||||
|
#.##...#...
|
||||||
|
#...##....#
|
||||||
|
.#..#...#.#
|
||||||
67
day03/part1Instructions.txt
Normal file
67
day03/part1Instructions.txt
Normal file
|
|
@ -0,0 +1,67 @@
|
||||||
|
--- Day 3: Toboggan Trajectory ---
|
||||||
|
|
||||||
|
With the toboggan login problems resolved, you set off toward the
|
||||||
|
airport. While travel by toboggan might be easy, it's certainly not
|
||||||
|
safe: there's very minimal steering and the area is covered in trees.
|
||||||
|
You'll need to see which angles will take you near the fewest trees.
|
||||||
|
|
||||||
|
Due to the local geology, trees in this area only grow on exact integer
|
||||||
|
coordinates in a grid. You make a map (your puzzle input) of the open
|
||||||
|
squares (.) and trees (#) you can see. For example:
|
||||||
|
..##.......
|
||||||
|
#...#...#..
|
||||||
|
.#....#..#.
|
||||||
|
..#.#...#.#
|
||||||
|
.#...##..#.
|
||||||
|
..#.##.....
|
||||||
|
.#.#.#....#
|
||||||
|
.#........#
|
||||||
|
#.##...#...
|
||||||
|
#...##....#
|
||||||
|
.#..#...#.#
|
||||||
|
|
||||||
|
These aren't the only trees, though; due to something you read about
|
||||||
|
once involving arboreal genetics and biome stability, the same pattern
|
||||||
|
repeats to the right many times:
|
||||||
|
..##.........##.........##.........##.........##.........##....... --->
|
||||||
|
#...#...#..#...#...#..#...#...#..#...#...#..#...#...#..#...#...#..
|
||||||
|
.#....#..#..#....#..#..#....#..#..#....#..#..#....#..#..#....#..#.
|
||||||
|
..#.#...#.#..#.#...#.#..#.#...#.#..#.#...#.#..#.#...#.#..#.#...#.#
|
||||||
|
.#...##..#..#...##..#..#...##..#..#...##..#..#...##..#..#...##..#.
|
||||||
|
..#.##.......#.##.......#.##.......#.##.......#.##.......#.##..... --->
|
||||||
|
.#.#.#....#.#.#.#....#.#.#.#....#.#.#.#....#.#.#.#....#.#.#.#....#
|
||||||
|
.#........#.#........#.#........#.#........#.#........#.#........#
|
||||||
|
#.##...#...#.##...#...#.##...#...#.##...#...#.##...#...#.##...#...
|
||||||
|
#...##....##...##....##...##....##...##....##...##....##...##....#
|
||||||
|
.#..#...#.#.#..#...#.#.#..#...#.#.#..#...#.#.#..#...#.#.#..#...#.# --->
|
||||||
|
|
||||||
|
You start on the open square (.) in the top-left corner and need to
|
||||||
|
reach the bottom (below the bottom-most row on your map).
|
||||||
|
|
||||||
|
The toboggan can only follow a few specific slopes (you opted for a
|
||||||
|
cheaper model that prefers rational numbers); start by counting all the
|
||||||
|
trees you would encounter for the slope right 3, down 1:
|
||||||
|
|
||||||
|
From your starting position at the top-left, check the position that is
|
||||||
|
right 3 and down 1. Then, check the position that is right 3 and down 1
|
||||||
|
from there, and so on until you go past the bottom of the map.
|
||||||
|
|
||||||
|
The locations you'd check in the above example are marked here with O
|
||||||
|
where there was an open square and X where there was a tree:
|
||||||
|
..##.........##.........##.........##.........##.........##....... --->
|
||||||
|
#..O#...#..#...#...#..#...#...#..#...#...#..#...#...#..#...#...#..
|
||||||
|
.#....X..#..#....#..#..#....#..#..#....#..#..#....#..#..#....#..#.
|
||||||
|
..#.#...#O#..#.#...#.#..#.#...#.#..#.#...#.#..#.#...#.#..#.#...#.#
|
||||||
|
.#...##..#..X...##..#..#...##..#..#...##..#..#...##..#..#...##..#.
|
||||||
|
..#.##.......#.X#.......#.##.......#.##.......#.##.......#.##..... --->
|
||||||
|
.#.#.#....#.#.#.#.O..#.#.#.#....#.#.#.#....#.#.#.#....#.#.#.#....#
|
||||||
|
.#........#.#........X.#........#.#........#.#........#.#........#
|
||||||
|
#.##...#...#.##...#...#.X#...#...#.##...#...#.##...#...#.##...#...
|
||||||
|
#...##....##...##....##...#X....##...##....##...##....##...##....#
|
||||||
|
.#..#...#.#.#..#...#.#.#..#...X.#.#..#...#.#.#..#...#.#.#..#...#.# --->
|
||||||
|
|
||||||
|
In this example, traversing the map using this slope would cause you to
|
||||||
|
encounter 7 trees.
|
||||||
|
|
||||||
|
Starting at the top-left corner of your map and following a slope of
|
||||||
|
right 3 and down 1, how many trees would you encounter?
|
||||||
59
day03/src/part1.c
Normal file
59
day03/src/part1.c
Normal file
|
|
@ -0,0 +1,59 @@
|
||||||
|
#include <stdio.h>
|
||||||
|
#include <stdlib.h>
|
||||||
|
#include <string.h>
|
||||||
|
|
||||||
|
/* Convert file into C structs for easier parsing */
|
||||||
|
void file_import(char * filename){
|
||||||
|
/* pointer to file */
|
||||||
|
FILE * file_pointer;
|
||||||
|
char intermediate_string[40];
|
||||||
|
char second_string[40];
|
||||||
|
char * line_get = second_string;
|
||||||
|
|
||||||
|
/* Open file based on filename variable */
|
||||||
|
file_pointer = fopen(filename, "r");
|
||||||
|
|
||||||
|
/* Fail safely if invalid file name */
|
||||||
|
if (file_pointer == NULL) {
|
||||||
|
printf("no such file.");
|
||||||
|
exit(2);
|
||||||
|
} else {
|
||||||
|
printf("File successfully loaded.\n");
|
||||||
|
}
|
||||||
|
|
||||||
|
line_get = fgets(intermediate_string, sizeof(intermediate_string), file_pointer);
|
||||||
|
/* Read until the end of the file */
|
||||||
|
while( !(feof(file_pointer)) ){
|
||||||
|
|
||||||
|
/* Loop back */
|
||||||
|
line_get = fgets(intermediate_string, sizeof(intermediate_string), file_pointer);
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Close file when complete */
|
||||||
|
fclose(file_pointer);
|
||||||
|
}
|
||||||
|
|
||||||
|
int main(int argc, char **argv) {
|
||||||
|
/* Final return value */
|
||||||
|
int final_value = 0;
|
||||||
|
/* Array index value */
|
||||||
|
int array_index = 0;
|
||||||
|
/* File name importing data from */
|
||||||
|
char * filename;
|
||||||
|
|
||||||
|
|
||||||
|
/* Check argument values, look for filename as first argument
|
||||||
|
* Fallback to test input if argument not provided */
|
||||||
|
if(argc >= 2){
|
||||||
|
filename = argv[1];
|
||||||
|
} else {
|
||||||
|
filename = "../data/testInput.txt";
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Generate expandable array */
|
||||||
|
|
||||||
|
|
||||||
|
/* Print final calculation */
|
||||||
|
printf("Final value: %d\n",final_value);
|
||||||
|
return(0);
|
||||||
|
}
|
||||||
Loading…
Add table
Add a link
Reference in a new issue