diff options
Diffstat (limited to '2020/11')
| -rw-r--r-- | 2020/11/.gitignore | 1 | ||||
| -rw-r--r-- | 2020/11/Makefile | 7 | ||||
| -rw-r--r-- | 2020/11/input | 98 | ||||
| -rw-r--r-- | 2020/11/puzzles.c | 158 |
4 files changed, 264 insertions, 0 deletions
diff --git a/2020/11/.gitignore b/2020/11/.gitignore new file mode 100644 index 0000000..60d075d --- /dev/null +++ b/2020/11/.gitignore @@ -0,0 +1 @@ +puzzle-[12] diff --git a/2020/11/Makefile b/2020/11/Makefile new file mode 100644 index 0000000..c32dafa --- /dev/null +++ b/2020/11/Makefile @@ -0,0 +1,7 @@ +all: + ${CC} ${CFLAGS} -o puzzle-1 puzzles.c + ${CC} ${CFLAGS} -DPART2 -o puzzle-2 puzzles.c + +.PHONY: clean +clean: + rm -f puzzle-[12] diff --git a/2020/11/input b/2020/11/input new file mode 100644 index 0000000..a586f62 --- /dev/null +++ b/2020/11/input @@ -0,0 +1,98 @@ +LLLLLL.LLLLLLLLLLLL.LLLLLL.LLLLLLLLLLLL.LLLLLLLLLLLLL.LLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLLLL +LLLLLL.LLLLLLLLLLLL.LLLLLLL.LLLLL.LLLLL.LLLLLLLLLLLLLLLLLLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL.LL +LLLLLLLLLLLLL.LLLLLLLLLLLLL.LLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLLLL.L.LLLLLL.LL.LLLLLL +LLLLLLLLLLLLL.LLLLL.LLLLLLLLLLLLLLLLL.LLLLLLLLLL.LLLL.LLLLLLL.LLLLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLLLL +LLLLL..LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLLLL.LLLL.LLLLLLL.LLLLL.LL.LLLLLLLLLLLLLL.LL.LLLLLLLLL +LLLLLL.LLLLL..LLLLL.LLLLLLL.LLLLL.LLLLLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLLL.LLLLLLLLL.L.LLLLL.L +LLLLLL.LLLLLL.LLL.L.LLLLLLL.LLLLL.LLLLL.LLLLLLLL.LLLL.LLLLLL..LLLLLLLL.LLLLLLLL.LLLLLLLLLLLLLL.LLL +.LLLLLLLLLLLL.LLL.L.LLLLLLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLLLLLLL.LLLLLL.L.L.LLLLLLLLLLLLL.L.LLLLLLLLL +LLLLLL.LLLLLL.LLLLL.LLLLLLL..LLLLLLLLLL..LLLLLLL.LLLLLLLLLLLL.LLLLLLLL.LLLLLLLL.LLL.LLLL..LLLLLLLL +..........LL....L..LL..L.....L...L....L............L.LL...L.......L.L.LL...L.L...L....L.L....LLL.. +LLLLLL.LLLLLL.LLLLL.LLLLLLL.LLL.L.LLLLL.LLLLLLLLLLLLLLLLLLLLL.LLLLLLLLLLLLL.LL..LLLLLLL.LLLLLLLLLL +LLLLLLLLLLLLL.LLLLL.LLLLLLL.LLL.L.LLLLLLLLLLLLLL.LLLL.LLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLLLLLLLL.LLL +.LLLLL..LL.LL..LLL.LLLLLLLL.LLLLL.LLLLL.LLLLLLLLLLLLL.LLLLLLL.LLLLLLLLLLLLLLLLL.LLLLLLLLLLLLLLLLLL +L.LLLL.LLL.LLLLLLLL.LLLLLLL.LLLLL.LLLLLLLLLLLLLLLLLLL.LLL.LLL.LLLLLLLL.LLLLLLLL.LLLLLLLLLLLLL.LLLL +LLLLLL.LLLLLLLLLLLLLLLLLLLL.L.LLLLLLLLL.LLLLLLLLLLLLLLLLLLLLL.LLLLLL.L.LLLLLLLL.LLLLLLLL.LLLLLLLLL +LLLLLL.LLLLLLLLLLLL.LLLLLLLLLLLLL.LLLLL.LLLLLLLL.LLLL.LLLLLLL.LLLLLL.L.LLLLLLLL.LLLLLLLL.LLLLLLLLL +...LLLLL.......L.LL..L..LL...LL..L.....L...L...LLL.L.L.....L.L....L.L......LL..L.L.L..LL.L.....LL. +LLLLLLLLLLL.L.LLL.LLLLLLLLL.LLLLLLLLLLL.LLLLLLLL.LLLL.LLLLLLLLLLLLLLLL.LLLLLL.L.LL.LLLLLLLLLLLLLLL +LLLLLL.LLLLLL.LLLLL.LLLLLLL.LLLLL.LLLLL.LLLLLLLLLLLLL.LLL.LLL.LLLLLLLL.LLLLLLLL..LLLLLLLLLLLLLL.LL +LLLLLL.LLLLLLLLLLLL.LLLLLLL.LLLLL.LLLLLLLLLLLLLLLLLLL.LLLLL.L.LLLLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLLLL +LLLLL..LL.L.LLLLLLL.LLLLLLL.LLLLL.LLLLLLL.LLLLLLLLLLL.LLLLLLLLLLLLLLLLLLLLLLL.L.LLLLLLLL.LLLLLLLLL +LLLLLL.LLLLLL.LLLLL.LLLLLLL.LLLLLL.LLLL.LLLLLLLL.LLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL.L.LLLLLLLLL +L.LLLL.LLLLLL.LLLLL.LLLLLLL.LLLLL.LLLLL.LLLLLLLL.LLLL.LLLL.LL.LLLLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLLLL +.LLLLL.LLLLLL.LLLLL.LLLLLLL.LLLLL.L.LLL.LLLLLLLL.LLL..LLLLLLL.LL.LLLLL.LLLLLLLLLLLLLLLLL.LLLLLLLLL +LLLLLL.LLLLLL.LLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLLL.LLLL.LLLLLLLLLLLLLLLL.L.LLLLLL.LLLLLLLLLLLLLLLLL. +L.LL..LLL.L.........L.L....L...LL.L......L..LL.......L.....L.LL.....L..L.L.....L.....L.L...L.L.... +LLLLLL.LLLLLLLLLLLL.LLLLLLL.LLLLL..LLLL..LLLLLLLLLLLL.LLLLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLLLLL.LLLLL +LLL.L..LLLL.L.LLLLLLLLLLLLL.LLLLL.LLLLL.L.LLLLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL..LLLLLLLL +LLLLLL.LLLLLL.LLLL.LLLLLLLL.LLLLLLLLLLLLLLLLLLLL.LLLL.LLLLLLL..LLLLLLL.LLLLLLLLLLLLLLLLL.LLLLLLLLL +LL.LLLLLLLLLLLLLLL..LLLLLLLLLLLL..LLLLLLLLL.LLLLLLLLL.LLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLL.L.LLLLLLLLL +LLLLLL..LLLLLLLLLLLLLLLLL.L.LLLLLLLLLLL.LLLLLLLL.LLLL.LLLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLLL +..L...L...L..L..LL...L..........L.....L......L....L.L..L.L.L..L.LL....L..L...L...L......L.....L..L +LLLLLLLLLLLL..LLLLL.LLLLLLL.LLLLL.LLLLLLLLLLLLLLLLLLL.LL.LLLLLLLLLLLLL.L.LLLLLL.LLLLLLLL.LLLLLLLLL +LLLLLLLLLLLLL.LLLLL.LLLLLLL.LLLLL.LLLLL.LLLLLLLL.LLLL.L.LLLLL.LLLLLLLLLLLLLLLLL..LLLLLLL.LLLLLLLLL +LLLLLLLLLLLLL.LLLLLLLL.LLLL.LLLLL.LLLLLLLLLLLLLL.LLLL.LLLLLLLLL.LLLLLL.LLLLLL.LLLLLLLLLL.LLLLLLLLL +LLLLLLLLLLLLL.LLLLL.LLLLLLLLLLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLL.LLL.LLLL.LLLLLLLL.LLLLL.LLLLLLLLLL.L +LLLLLLLLLLLLL.L.LLL.LLLLLLL.LLLLL.LLLLL.LLLL.LLLLLLLL.LLLLLLLLLLLLLLLLLLLLL.LLL.LLLLLLLL.LLLLLLLLL +LLLLLL.LLLLLLLLLLLL.LLLLLLL.LLLLL.LLLLL.LLLLLLLLLLLLL.LLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLL..LLLLLLLLL +LLL..L..LLLL.LLL.L......L...LL.L..L.L...L...LL....L.L.L.L................L....L..L...L......LLL.L. +LLLLLLLLLLLLL.LLLLLLLLLLLLL.LLLL..LLLLL.LLLLLLLL.LLLL.LLLLLLL.LLLLLLLL..LLLLLLL.LLLLLLLLLLLLLLLLLL +LLLLLL.LLLLLL.LLLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLLLLLLLLLLLLL.LL.LLLLLLLL.LLLLLL.LLLLLLLLLL.LLLLLLLLL +.LLLLL.LLLLLL.LLLLL.LLLLLLLLLLLLL.LLLLLLLLLLLLLL.LLLL.LLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLL.LLLL.LLLL +LLLLLLLLLLLLL.LLLLLLLLLLLLL.LLLLLLLLLLL.LLLLLLLL.LLLLLLLLLLL..LLLLLLLL.LLLLLLLL.LLLLLLLL.L.LLLLLLL +LLLLLLLLLLLLL.LLLLL.LLLLLLL.LLLLLLLLLLLLLLLLLLLL.LLLL.LLLLLLLLLLLLLLLL.LLLLL.LL.LLLLLLLLLLLLLLLLLL +LLLLLL.LLLLLL.LLLLL.LLLL.LL.LLLLL.LLLLL.LLLLLLLL..LLL.LLLLL.L.LLLLLLLLLLLLLLLLL.LLL.LLLL.LLLLLLLLL +LL.LLL.LLLLLL.LLLLL.LLLLLLLLLLLLL.LL.LLLLLLLLLLL.LLLLLLLLLLLL.LLLLLLLL.LLL.L.LL.LLLLLLLLLLL.LLLLLL +LLLLLLLLLLLLL.LLLLL..LLLLLLLLLLLLLLLLLL.L.LLLLLL.LLLL.LLLLLLL.LLLLLLLLL.LLLLLLLLLLLLLLLL.LLLLLLLLL +.LLLLL..L.L.L...L...L..LL.L.L.LL.L...L.L.L...................LL..L...L......L..L.........L.....LL. +LLLL.LLLLLLLL.LLLLL.LLLLLLL.LLLLLL.LLLLLLLLLLLLL.LLLL.L.LLLLL.LLLLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLLLL +LLLLLL.LLLLLL.LLLLLL.L.LLLL.LLLLL.LLLLLLLLLLLLLL.LLLL.LLLLLLLLLLLLLLLL.LLLLLLLL.LLLL.LLL.LL..LLLL. +.LLLLL.LLLLLLLLLLLL.LLLL.LLLLLLLL.LLLLLLLLLLLLLL.L.LLLL.LLLLLLLLLLLLLL.LLLLLLL..LLLLLLLL.LLLLLLLLL +LLLLLL.LLLLLL.LLLLL.LLLLLLL.LLLL...LLLLL.LLLLLLL.LLLL.LLLLLL..LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL +LLLLLLLLLLLLLLLLLLL.LLLLLLLLLLLLLLLLLLL.LLL.LLLLLLLLL.LLLLLLL.LLLLLLLL..L.LLLLL.LLLLLLLL.LLLLLLLLL +LLLLLLLLLLLLL.LLLLLLLLLLLLL.LLLLLLLLLLL.LLLLLLLLLLLLL.LLLLLLL.LLLLLLLL.LLLLLLLL.LL.LLLLLLLLLLLLLL. +LLL.LL.LLLLLL.LLLLL.LLLLLLL.LLLLLLLLLLL.LLLLLLLL.LLLLLLLLLLLLLLLLLLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLL +LLLLLL.LLLLLL.LLLLLLLLLLLLL.LLLLLLLL.LLLLLLLL.LL.LLLL.LLLLLLL.LLLLLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLL +LLLLLL.LLL..L.LLLLL.LLLLLLLLLLLLLLLLL.L.LLLLLLLLLLLLL.LLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLLL +L.LL.L.L...L.LL.L.LLL...L.......LLL.L.LL..LLLL.L.L...L..LL.L..LL..L.L..LLLL.L.L..L.L....L....L...L +LLLLLL.LLLLLLLLLLLL.LLLLLLL.LLLLL.LLLLL.LLLLLLLL.LLLL.LLLLLLL.LLLLLLLLLLLLLLLLL.LLL.LLLL.L.LLLLLLL +LLLLLL.LLLLLLLLLLLLLLLLLLLL.LLLLL.LLLLLLLLLLLLLLLL.LL.LLLLLLLLLLLLLLLL.LLLLLLLLLLLLLLLLL.LLLLLLLLL +LLLLLL.L.LLLL.LLLLL.LLL.LLL.LLLLLLLLLLLLL.LLLLLLLLLLL.LLLLLL..LLLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLLL +LLLL.LLLLLLLL.LLLLL..LLLLLLLLLLLL.LL.LL.LLLLLLLLLLLLL.LLLLLLL.LLLLLLLL.L.LLLLLL.LLLLLLLLLLLLLLLLLL +LLLLLL.LLLLLLLLLLLLLLLLLLLL.LLLLLLLLLLL.LLLLLLLLLLLLL.LLLLLLL.LLLLLLLL.LLLLLLLL..LLLLLLL.LL.LLLLLL +LLLLLL.LLLLLLLLLLLL.LLLLLLLLLLLLL.LLLL..LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLLLL.LLL.LLLLL +L.L..L................L..LL.....LL...L............L....LL..LL.LLL.L.............L..L...L.....LLL.. +LLLLLLLLLLLLLLLL.LL.LLLLLLL.LLLLL.LLLLLLLLLLLLLLLLLLL.LLLLLLL.LLLLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLLLL +LLLLLL.LLLLL.LLLLLL.LLLLLLL.LLLLL.LLL.LLLLLLLLLL.LLLL.LLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLL. +LLLLLL.LLLLLLLLLLLLLL.LLLLL.LLLLL.LL.LL.LLLLLLLL.LLLL.LLLLLLL.LL.LLLLL.LLLLLLLLLLLLLLLLL.LLLLLLLLL +LLLL.LL.LLLLL.LLLLL.LLLLLLL.LLLLL.LLLLL.LLLLLLLL.LLLL.LLLLLLL.LLLLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLLLL +LLLLLL.LLLLL..LLLLL.LLLLLLL.LLLLLLLLLLLLLLLLLLLL.LLLL.LLLLLLL.LLL.LLLL.LLLLLL.L.LLLLLLLL.LLLLLLLLL +L.L..L...LL.L.....LL..LL.L.....L.L..L....L..L.L...L.LLLL....L...LL......L..L....LL..L..L........LL +LLLLLLLLLLLLLLLLLLL.LLLL.LL.LLLLLLLLLLL.LLLLLLLLLLLLL.LLLLLLLLLLLLLLLL.LLL.LLLL.LLLLLLLL.LLLLL.LLL +LLLLLLLLLLLLL.LLLLL.LLLLLLL.LLLLLLLL.LL.LLLLLL.LLLLLL.LLLLLLL.LLLLLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLL +LLLLLL.LLLLL.LLLLLL.LLLLLLL.LLLLLLLLLLL..LLLLLLL.L.LL.LLLLLLL.LLLLLLLL.LLLLLLLLLLLLLLLL..LLLLLLLLL +LLLLLL.LLLLLLLLLLLL.LLLLLLL.LLLLL.LLLLL.LLLLLLLLLLLLLLLLLLLLL.LLLLLLLL.LLL.LLLL.LLLLLLLL.LLLLLLLLL +LLLLLL.LLLLLLLLLLLLLLLLL.LL.LLLLL.LLLLLLLLLLLLLLLL.LLLLLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLLL +LLLLLL.LLLL.L.LLLLLLLLLLLLL.LLLLLLLLL.L.LLLLLLLL.LLLL.LLLLLLL.LLLLLLLL.LLLLLLL..LLLLLLLL.LLLLLLLLL +LLLLL..LLLL.L.LLLLL.LLLLLLLLLLLLL.LLLLL.LLLLLLLL.LLLLLLLLLLLL.LLLLLLLLLLLLLLLL..LLLLLLLL.LLLLLLLLL +L.LLLLLLLLLLLLLLLLL.LLLLLLL.LL.LL.LLLLL.LLLLLLLLLLLLL.LL.LLLLLLLLLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLLLL +LL.L......L......L...L..LLL.....L.L..L.L...L......L..L..L.....L...LL.L.LL.L.LLL....L.LLL....L..L.. +LLLLLLLLLL.LLLLLLLLLL.LL.LL.LLLLLLLLLLL.L..LLLLL.LLLL.LLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLLL +LLLLLL.LLLLLL.LLLLL.LLLLLLL.LLLLL.LLLLL.LLLLL.LL..LLL.LLLLLLL.LLLLLLLLL.LLLLLLL.LLLLLLLL.LLLLLLLLL +LLLLLL..LL.LL.LLLLL.LLLLLLL.L.LLLLLLLLL.LLLLLLLL.LLLLLLLL.LLL.LLL.LLLL.LLLLLLLLLLLLLLLL..LLLLLLLLL +LLLLLLLLLLL.LLLLLLL.LLL.LLLLLLLLL.LLLLL.LLLLLLLL.LLLLLL.LLLLLLLLLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLLL +LLLLLLLLLLL.L.LLLLL.LLLLLLL.LLLLL.LLLLL.LLLLLLLL.L.LLLLLLLLLLL.LLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLLL +LLLLLL.LLLLLL..LLLL.LLLLLLLLLLLLLLLL.LL.LLLL.LLL.LLLL.LLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLLL +LLLLLLLLLLLLLLLLLLL.LLLLLLL.LLLLLLLLL.L.L.LLLLLL.LLLLLLLLLLLL.LLLLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLLLL +LLLLLL.LLLLLLLLLLLL.LLLLLLL.LLLLLLLLLLL.LLLLLLLLLL.LLLLLLLLLLLLLLLLLLL.LL.LLLLLLLLL.LLLLLLL.LLLLLL +L..L.LL......LLL....LLLL.......L.L..L..L....LLLLL..LLLLL..L..L.L.L........LLL...LL.L......LLL..... +LLLLLL.LLLLLLLLLLLLLLLLLLLL.LLLL..LLLLLLLLLLLLLLLLLLL.LLLLLLLLL.LL.LLL.LLLLLLLL.LLLLLLLL.LLLLLLLLL +LLLLLL.LLLLLL.LLLLL.LLLLLLL.LLLLLLLLLLL.LLLLLLLL.LLLLLLLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLLL +LLLLL.LLLL.LLLLLLLL..LLLLLL.LLLLL.LLLL...LLLLL.L.LLLL.LLLLLLL..LLLLLLLL.LLLLLLLLLLLLLLLL.LLLLLLLLL +LLLLLLLLLLLLL.LLLLL.LLLLLLL.LLLLL.LLLLLL.LLLLLLLLLLLL.LLLLLLLLLLLLLLLLLL.LLLLLL.LLLLLLLL.LLLLL.LLL +LLLLLLLLLLLLL.LLLLL.L.LLLLL.LLLLLLLLLLL.LLLLLLLLLL.LL.LLLLLLLLLL.LLLLL.LLLLLLLL.LLLLLLLLLLLLL.LLLL +LLLLL.LLLLLLLLLLLLL.LLLLLLL.LLLLL.LLLLL.LLLLLLLL.LLLL.LLLLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLLLLL +LLLLLL.LLLLLL.LLLLL.LLLLLLL.LLLLL.LLLLL.LLLLLLLL.LLLL.LLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLLL +LLLLLL.LLLLLL.LLLLL.LLLLLLL.LLLLL.LLLLLLLLLLLLLLLLLLL.LLLLLLL.LLLLLLLL.L.LLLLLL.LLLLLLLLLLLLLLLLL. +LLLLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLLLLLLL.LLLLLLLL.LLLL.LLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLLLLL
\ No newline at end of file diff --git a/2020/11/puzzles.c b/2020/11/puzzles.c new file mode 100644 index 0000000..7c579b9 --- /dev/null +++ b/2020/11/puzzles.c @@ -0,0 +1,158 @@ +#include <err.h> +#include <stdbool.h> +#include <stdlib.h> +#include <stdio.h> + +#define ROWCNT 98 +#define ROWLEN 98 + +#ifdef PART2 + #define IS_SEAT(a, b) \ + if (rows[a][b] == '.') \ + continue + #define IS_OCC(a, b) \ + if (rows[a][b] == '#') \ + adjecent++ +#endif + +bool changed; +char rows[ROWCNT][ROWLEN + 1]; +char temp[ROWCNT][ROWLEN + 1]; + +/* Check and update a seat at the given index */ +static void +check_seat(int const i, int const j) +{ + if (rows[i][j] == '.') + return; + + int adjecent = 0; + +#ifdef PART2 + /* Up */ + for (int h = i - 1; h >= 0; h--) { + IS_SEAT(h, j); + IS_OCC(h, j); + break; + } + /* Down */ + for (int h = i + 1; h < ROWCNT; h++) { + IS_SEAT(h, j); + IS_OCC(h, j); + break; + } + /* Left */ + for (int h = j - 1; h >= 0; h--) { + IS_SEAT(i, h); + IS_OCC(i, h); + break; + } + /* Right */ + for (int h = j + 1; h < ROWLEN; h++) { + IS_SEAT(i, h); + IS_OCC(i, h); + break; + } + /* Up-Left */ + for (int h = i - 1, k = j - 1; h >= 0 && k >= 0; h--, k--) { + IS_SEAT(h, k); + IS_OCC(h, k); + break; + } + /* Up-Right */ + for (int h = i - 1, k = j + 1; h >= 0 && k < ROWLEN; h--, k++) { + IS_SEAT(h, k); + IS_OCC(h, k); + break; + } + /* Down-Left */ + for (int h = i + 1, k = j - 1; h < ROWCNT && k >= 0; h++, k--) { + IS_SEAT(h, k); + IS_OCC(h, k); + break; + } + /* Down-Right */ + for (int h = i + 1, k = j + 1; h < ROWCNT && k < ROWLEN; h++, k++) { + IS_SEAT(h, k); + IS_OCC(h, k); + break; + } +#else + for (int h = i - 1; h <= i + 1; h++) { + if (h < 0 || h > ROWCNT - 1) + continue; + for (int k = j - 1; k <= j + 1; k++) { + if (k < 0 || k > ROWCNT - 1 || (h == i && k == j)) + continue; + if (rows[h][k] == '#') + adjecent++; + } + } +#endif + /* Edit seats as needed */ + if (rows[i][j] == 'L' && adjecent == 0) { + temp[i][j] = '#'; + changed = true; +#ifdef PART2 + } else if (rows[i][j] == '#' && adjecent >= 5) { +#else + } else if (rows[i][j] == '#' && adjecent >= 4) { +#endif + temp[i][j] = 'L'; + changed = true; + } else + temp[i][j] = rows[i][j]; +} + +int +main(void) +{ + /* Initialize the temp array to be all floor */ + int i, j; + for (i = 0; i < ROWCNT; i++) { + for (j = 0; j < ROWLEN; j++) + temp[i][j] = '.'; + } + + FILE *fp; + if (!(fp = fopen("input", "r"))) + err(EXIT_FAILURE, "fopen"); + + /* Read in seats */ + i = j = 0; + char c; + while ((c = fgetc(fp)) != EOF) { + if (c == '\n') { + i = 0; + j++; + } else + rows[j][i++] = c; + } + fclose(fp); + + /* Update the seats until they don't change anymore */ + do { + changed = false; + for (i = 0; i < ROWCNT; i++) { + for (j = 0; j < ROWLEN; j++) + check_seat(i, j); + } + + for (i = 0; i < ROWCNT; i++) { + for (j = 0; j < ROWLEN; j++) + rows[i][j] = temp[i][j]; + } + } while (changed); + + /* Calculate filled seats */ + int count = 0; + for (i = 0; i < ROWCNT; i++) { + for (j = 0; j < ROWLEN; j++) { + if (rows[i][j] == '#') + count++; + } + } + + printf("%d\n", count); + return EXIT_SUCCESS; +} |