generated from blizzardfinnegan/advent-of-code
Finish day 5 part 1
This commit is contained in:
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GPG key ID:
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6 changed files with 979 additions and 0 deletions
14
day05/CMakeLists.txt
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14
day05/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(day05 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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814
day05/data/input.txt
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day05/data/input.txt
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|
||||
FFBBBBBLLL
|
||||
BFBFBFFLLR
|
||||
FBBFFBBLLL
|
||||
FBBBBBBLRL
|
||||
BBFFBBBRLR
|
||||
FBFFFBBRLL
|
||||
BFBFBBBRLL
|
||||
BBFBFFBLLR
|
||||
FFFBBFFRRR
|
||||
FBFBFBBRRR
|
||||
FBBFBFFRRR
|
||||
BFBBBFBRLL
|
||||
FBFBFFBLLR
|
||||
BBFFBFBLLL
|
||||
BFFFBBFRLL
|
||||
FBFBFFFLLR
|
||||
FBFFFFBRRR
|
||||
FFBFBBFLRL
|
||||
BBFFFBFLLL
|
||||
FBBFBBBLLL
|
||||
FBBBFBBRRL
|
||||
FBFBFBFLLL
|
||||
FFFFBFBLRL
|
||||
FFFFFBBRRR
|
||||
FFBFFBBLLR
|
||||
BBFFFFFRRL
|
||||
FBFBBBFLLR
|
||||
BFBBBFFRRL
|
||||
FBFBBFBRLR
|
||||
BFBBBFBLRR
|
||||
FFBFBFFLLR
|
||||
FBFBFFBRRL
|
||||
FFBFBFBRLR
|
||||
BFBFFBBRLL
|
||||
FFBFFFFRRR
|
||||
BFFBBFBRRR
|
||||
FFBBBBFRRL
|
||||
FFFBBBBLRL
|
||||
FFBBBFFRRL
|
||||
BFBBBBFRLL
|
||||
BFBFBFBLLL
|
||||
BFBBFFFRRL
|
||||
BFFBFFBLLR
|
||||
FFBBBFBRLR
|
||||
FFBBFBFRRL
|
||||
FBFFBBBLRR
|
||||
FBBFBBBLLR
|
||||
BFBFFBBLLR
|
||||
BFFFFBFLLL
|
||||
FFFBFBFLLR
|
||||
FBFFFFBLRR
|
||||
FBBFBFBLLL
|
||||
BFFFFBFRLR
|
||||
FBBBFBFRLR
|
||||
FFBBFBFRLR
|
||||
BFFFFFFLLR
|
||||
BFFFFBFRRL
|
||||
BBFFBBFRRR
|
||||
FBFFBFFLRL
|
||||
FBBBBBFRLR
|
||||
FBBBBFBLRL
|
||||
BFFFBBBRRR
|
||||
FFFFBFFRRL
|
||||
FFBFFFFLLL
|
||||
FFFBFBFRLL
|
||||
FFBFFBFLRR
|
||||
FBBFFBFLRL
|
||||
FBBFFBBLRR
|
||||
FFBFFBFRRL
|
||||
BFFFFFFRRR
|
||||
BFBFBBBRLR
|
||||
BFFBFBBRLL
|
||||
BBFFBFFRRL
|
||||
FBBFBBFRLL
|
||||
BFFFFFBRLR
|
||||
BFBBBBFLLL
|
||||
BFBBFFBRRR
|
||||
FFFFBFBLLL
|
||||
FFBBFFFRLR
|
||||
BFBBBFBRRL
|
||||
BFFFBBFRRR
|
||||
FBFFFFFRRL
|
||||
BFFBFFFRLL
|
||||
BFFFFBBRLR
|
||||
FFBBFFBLRR
|
||||
BBFFBBBLRR
|
||||
FBBFFFFRRL
|
||||
BFFFFBBRLL
|
||||
BFFFFFBRLL
|
||||
BFBFFFFLLR
|
||||
FBBBBBFRRL
|
||||
FBFBBBBRRR
|
||||
FBBFBBFRRL
|
||||
FBBBFBBRLL
|
||||
FBFFBFFLLR
|
||||
FFBFFFFRLR
|
||||
BFFFFFFRRL
|
||||
BFBBFFFRLR
|
||||
FFBBBBFLRL
|
||||
FFBFFBBRLL
|
||||
FFBBFBBLRL
|
||||
FBFBFFBLRR
|
||||
BFFBFBFRLR
|
||||
FBFFBBBRRR
|
||||
FBBBBFFLRL
|
||||
FBBFBFFRRL
|
||||
FFBFBFFLRL
|
||||
BFFBBFBRLR
|
||||
BBFFFFFLRR
|
||||
FBBFFFBRLL
|
||||
BFFFBFBRRL
|
||||
FFBFBFFRLL
|
||||
BBFFBBBRRR
|
||||
BBFFFFBLRL
|
||||
BBFFFBBRRR
|
||||
BBFFFFBRLL
|
||||
FBBFFBFLLL
|
||||
BFFFBBBLRR
|
||||
FFBFFBFLLR
|
||||
FBBFBFFLLR
|
||||
FBFBBFFLRL
|
||||
FBBBBFBRRL
|
||||
BFBBFBFLRR
|
||||
BBFFBFBLRR
|
||||
FFFBBBBLRR
|
||||
FBBBFFBRLR
|
||||
FBFBFBBLRR
|
||||
FBBBFBBRRR
|
||||
BFBBFFFLLL
|
||||
BFFFFBBLLR
|
||||
FBBBBBBRLL
|
||||
FBBBFBBLRL
|
||||
FBBBBBBRRR
|
||||
FFFBBBFRLL
|
||||
BBFFFFFLLL
|
||||
FBBFFBFRLR
|
||||
BFBBBBFLRL
|
||||
BFFFFBFRRR
|
||||
FBFFBBBLRL
|
||||
BFBBFBBRRL
|
||||
FBFFBFBLRL
|
||||
FFFBBFBRRR
|
||||
BFBFBBBRRR
|
||||
BFBBFFFLRL
|
||||
BBFFFBBRRL
|
||||
FFFBBBBRRL
|
||||
FBBBFFBLLR
|
||||
FBFBFFFLRR
|
||||
FBFBFBBRLR
|
||||
BFFFBBFRRL
|
||||
FBFBFBFRRR
|
||||
FBBFFFFLLL
|
||||
FBBFFBBLRL
|
||||
FBBBFBFLRR
|
||||
FFFBBFFLLL
|
||||
BFFBFFBRRL
|
||||
BFFFFBBRRR
|
||||
FFFFFBBRLR
|
||||
BBFFBBBLRL
|
||||
FBBFBBFRRR
|
||||
BFBBFBBLRR
|
||||
FFBFFFFRLL
|
||||
BFBFFFBRRL
|
||||
FBBFBBBRLL
|
||||
FBFBBFBRLL
|
||||
FBFFFBFRRL
|
||||
BFFBFFBLRR
|
||||
FBBFBFBLRR
|
||||
BFBBBBFLLR
|
||||
BFBBBFBLLR
|
||||
FFFFBFBRRL
|
||||
FFFBBBBRLR
|
||||
FFBFFFBRLR
|
||||
BFFBFFBLRL
|
||||
FBBFBFFLLL
|
||||
BFFBFBBLLL
|
||||
FBFBBFBLLR
|
||||
FBBFFBFLRR
|
||||
FFBBBBFLLR
|
||||
FBBFBFFLRL
|
||||
FFFBFBBLRL
|
||||
FBBFFFFRLL
|
||||
BFBFBBFRRR
|
||||
FBFFBBBLLL
|
||||
FFBFBBBLRL
|
||||
BBFFBBFLLR
|
||||
FBFFFBFLLL
|
||||
BFBFBFBRRR
|
||||
BFBBBBBRRL
|
||||
BBFBFFBLLL
|
||||
BFFFFFFLRL
|
||||
FBBFFFBRRL
|
||||
FFBBFBFRLL
|
||||
BBFFBFFLLR
|
||||
BBFBFFFRRL
|
||||
FFFBBFBLLL
|
||||
BFFBFFFRRL
|
||||
BFBBBBBRLL
|
||||
FFFBFBFRLR
|
||||
FBFFBBFRRL
|
||||
BFFBFFFLLR
|
||||
FFBBFFFLLL
|
||||
BFFBBBFRLL
|
||||
FFBBBBFRLL
|
||||
FFFFBFFLRR
|
||||
FFBBBBBLRL
|
||||
FBBBBBBLRR
|
||||
FBBFFFBLLR
|
||||
BBFFFBBRLL
|
||||
BFFBBFFLRL
|
||||
FFFBFBFRRR
|
||||
FBFBFBBLLL
|
||||
FBBBBBFRLL
|
||||
FBBBBBBRRL
|
||||
FBFBBBBRRL
|
||||
FBFFBFFRRL
|
||||
BFFFBBFLLR
|
||||
BFFBFFFLRR
|
||||
BFFBBFBLRR
|
||||
FFFFBFBRLL
|
||||
BFFBFFFLRL
|
||||
FFBFFFBLRL
|
||||
FBBFFFBLRR
|
||||
BFBBBFFLRL
|
||||
FBFFBBFLRL
|
||||
BFFFBBBRLR
|
||||
BFFBFBBRRR
|
||||
BFFFFFBLRL
|
||||
BBFBFFFLRL
|
||||
BFBFBBFRRL
|
||||
BBFFBFFLRR
|
||||
FBFBFBBLRL
|
||||
BFBFBBFRLR
|
||||
FFFBBBBRRR
|
||||
FBFFFFBLLR
|
||||
FBFBBFFRLL
|
||||
BFBFFBFRRR
|
||||
FFFBFFBLLR
|
||||
FBFBFBFLRL
|
||||
FBBFBBBRLR
|
||||
FFFBFBBLLR
|
||||
FFBBFFFRLL
|
||||
BFBFFBBRLR
|
||||
BBFFFFBLLL
|
||||
FFBBBFFRRR
|
||||
BFFBFFFRLR
|
||||
FFBFFBBLRL
|
||||
FBBBFFBRRR
|
||||
BFBFBBFRLL
|
||||
BFBBBBFRRL
|
||||
BFBBFFBRLL
|
||||
BBFFFBBLRL
|
||||
FFBBBBFRRR
|
||||
BBFFFBFRRR
|
||||
BFBFFFFLRR
|
||||
FFFBFBBLRR
|
||||
BFFBBFBRRL
|
||||
FBBFBBBRRR
|
||||
FBFBFFFLRL
|
||||
BFBBFBFRLR
|
||||
FFFBFFFLRL
|
||||
FFBBBFBRRR
|
||||
FBBFFBBRRR
|
||||
BBFFFBBLLR
|
||||
FFFBFFBLRL
|
||||
FFBFBBBRRL
|
||||
FFBBBFFLLR
|
||||
FBFFBBFRLR
|
||||
FBFFFBFLRL
|
||||
FFBBFBBRRL
|
||||
FFFBBFFRRL
|
||||
FBBFBBFRLR
|
||||
FBFBBFFRRR
|
||||
FFFFBFFRRR
|
||||
BFFFFFBLRR
|
||||
BBFFFFBRRL
|
||||
FBBBFFBLRR
|
||||
BFFBFBFRLL
|
||||
FFBFFFBRRL
|
||||
FFBFBFBLLR
|
||||
4
day05/data/testInput.txt
Normal file
4
day05/data/testInput.txt
Normal file
|
|
@ -0,0 +1,4 @@
|
|||
FBFBBFFRLR
|
||||
BBFFBBFRLL
|
||||
FFFBBBFRRR
|
||||
BFFFBBFRRR
|
||||
42
day05/part1Instructions.txt
Normal file
42
day05/part1Instructions.txt
Normal file
|
|
@ -0,0 +1,42 @@
|
|||
--- Day 5: Binary Boarding ---
|
||||
|
||||
You board your plane only to discover a new problem: you dropped your boarding pass! You aren't sure which seat is yours, and all of the flight attendants are busy with the flood of people that suddenly made it through passport control.
|
||||
|
||||
You write a quick program to use your phone's camera to scan all of the nearby boarding passes (your puzzle input); perhaps you can find your seat through process of elimination.
|
||||
|
||||
Instead of zones or groups, this airline uses binary space partitioning to seat people. A seat might be specified like FBFBBFFRLR, where F means "front", B means "back", L means "left", and R means "right".
|
||||
|
||||
The first 7 characters will either be F or B; these specify exactly one of the 128 rows on the plane (numbered 0 through 127). Each letter tells you which half of a region the given seat is in. Start with the whole list of rows; the first letter indicates whether the seat is in the front (0 through 63) or the back (64 through 127). The next letter indicates which half of that region the seat is in, and so on until you're left with exactly one row.
|
||||
|
||||
For example, consider just the first seven characters of FBFBBFFRLR:
|
||||
|
||||
Start by considering the whole range, rows 0 through 127.
|
||||
F means to take the lower half, keeping rows 0 through 63.
|
||||
B means to take the upper half, keeping rows 32 through 63.
|
||||
F means to take the lower half, keeping rows 32 through 47.
|
||||
B means to take the upper half, keeping rows 40 through 47.
|
||||
B keeps rows 44 through 47.
|
||||
F keeps rows 44 through 45.
|
||||
The final F keeps the lower of the two, row 44.
|
||||
|
||||
The last three characters will be either L or R; these specify exactly one of the 8 columns of seats on the plane (numbered 0 through 7). The same process as above proceeds again, this time with only three steps. L means to keep the lower half, while R means to keep the upper half.
|
||||
|
||||
For example, consider just the last 3 characters of FBFBBFFRLR:
|
||||
|
||||
Start by considering the whole range, columns 0 through 7.
|
||||
R means to take the upper half, keeping columns 4 through 7.
|
||||
L means to take the lower half, keeping columns 4 through 5.
|
||||
The final R keeps the upper of the two, column 5.
|
||||
|
||||
So, decoding FBFBBFFRLR reveals that it is the seat at row 44, column 5.
|
||||
|
||||
Every seat also has a unique seat ID: multiply the row by 8, then add the column. In this example, the seat has ID 44 * 8 + 5 = 357.
|
||||
|
||||
Here are some other boarding passes:
|
||||
|
||||
BFFFBBFRRR: row 70, column 7, seat ID 567.
|
||||
FFFBBBFRRR: row 14, column 7, seat ID 119.
|
||||
BBFFBBFRLL: row 102, column 4, seat ID 820.
|
||||
|
||||
As a sanity check, look through your list of boarding passes. What is the highest seat ID on a boarding pass?
|
||||
|
||||
9
day05/part2Instructions.txt
Normal file
9
day05/part2Instructions.txt
Normal file
|
|
@ -0,0 +1,9 @@
|
|||
--- Part Two ---
|
||||
|
||||
Ding! The "fasten seat belt" signs have turned on. Time to find your seat.
|
||||
|
||||
It's a completely full flight, so your seat should be the only missing boarding pass in your list. However, there's a catch: some of the seats at the very front and back of the plane don't exist on this aircraft, so they'll be missing from your list as well.
|
||||
|
||||
Your seat wasn't at the very front or back, though; the seats with IDs +1 and -1 from yours will be in your list.
|
||||
|
||||
What is the ID of your seat?
|
||||
96
day05/src/part1.c
Normal file
96
day05/src/part1.c
Normal file
|
|
@ -0,0 +1,96 @@
|
|||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <math.h>
|
||||
|
||||
const int MAX_ROW = 127;
|
||||
const int MIN_ROW = 0;
|
||||
const int MAX_COL = 7;
|
||||
const int MIN_COL = 0;
|
||||
const int ROW_MULT = 8;
|
||||
|
||||
/* Convert file into C structs for easier parsing */
|
||||
int file_import(char * filename){
|
||||
/* pointer to file */
|
||||
FILE * file_pointer;
|
||||
char intermediate_string[12];
|
||||
char second_string[12];
|
||||
char * line_get = second_string;
|
||||
int highest_id;
|
||||
int high_row;
|
||||
int low_row;
|
||||
int high_column;
|
||||
int low_column;
|
||||
int index;
|
||||
|
||||
/* 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)) ){
|
||||
high_row = MAX_ROW;
|
||||
low_row = MIN_ROW;
|
||||
high_column = MAX_COL;
|
||||
low_column = MIN_COL;
|
||||
for(index = 0; index < strlen(intermediate_string);++index){
|
||||
switch(intermediate_string[index]){
|
||||
case 'F':
|
||||
high_row = (high_row + low_row) / 2;
|
||||
break;
|
||||
case 'B':
|
||||
low_row = ((high_row + low_row) / 2) + 1;
|
||||
break;
|
||||
case 'L':
|
||||
high_column = (high_column + low_column) / 2;
|
||||
break;
|
||||
case 'R':
|
||||
low_column = ((high_column + low_column) / 2) + 1;
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
printf("%d,%d,%d,%d\n",high_row,low_row,high_column,low_column);
|
||||
}
|
||||
/* Replace highest ID if possible */
|
||||
highest_id = high_row * ROW_MULT + high_column > highest_id ? high_row * ROW_MULT + high_column : highest_id;
|
||||
/* Loop back */
|
||||
line_get = fgets(intermediate_string, sizeof(intermediate_string), file_pointer);
|
||||
}
|
||||
|
||||
/* Close file when complete */
|
||||
fclose(file_pointer);
|
||||
return highest_id;
|
||||
}
|
||||
|
||||
int main(int argc, char **argv) {
|
||||
/* Final return value */
|
||||
int highest_id = 0;
|
||||
/* Array index value */
|
||||
int array_index = 0;
|
||||
/* File name importing data from */
|
||||
char filename_array[30];
|
||||
char* filename = filename_array;
|
||||
|
||||
/* 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";
|
||||
}
|
||||
|
||||
highest_id = file_import(filename);
|
||||
|
||||
/* Print final calculation */
|
||||
printf("Final value: %d\n",highest_id);
|
||||
exit(0);
|
||||
}
|
||||
Loading…
Add table
Reference in a new issue