commit 7b6cb31d1853481c87c9818a899d73d6f28e4b86 parent b7aa4dda708d1b8068146bdad5f2c80242ab57cd Author: night0721 <[email protected]> Date: Mon, 4 Dec 2023 23:00:08 +0000 day 3 and day 4 Diffstat:
| A | 2023/3/1.c | | | 83 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | 2023/3/2.c | | | 90 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | 2023/3/input | | | 140 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | 2023/4/1.c | | | 138 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | 2023/4/2.c | | | 88 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | 2023/4/input | | | 199 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | lib/util.c | | | 66 | ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | lib/util.h | | | 4 | ++++ |
8 files changed, 808 insertions(+), 0 deletions(-)
diff --git a/2023/3/1.c b/2023/3/1.c @@ -0,0 +1,83 @@ +#include <stdio.h> +#include <string.h> +#include <stdlib.h> +#include <ctype.h> +#include <stdbool.h> + +int main() { + int LINE_LENGTH = 140; + FILE *inputfile = fopen("./input", "r"); + char line[2048] = { 0 }; + size_t len = 0; + ssize_t read; + if (inputfile == NULL) { + printf("Input file not found. Exiting."); + exit(1); + } + char **lines = malloc(sizeof(char *) * LINE_LENGTH); + int line_count = 0; + while (fgets(line, 1024, inputfile)) { + lines[line_count] = malloc(sizeof(char) * 2048); + strcpy(lines[line_count], line); + line_count++; + } + int *goodnumbers = malloc(sizeof(int) * 4096); + int goodnumber_count = 0; + for (int i = 0; i < LINE_LENGTH; i++) { + char *line = lines[i]; + for (int j = 0; j < strlen(lines[i]); j++) { + bool append = false; + char *number = malloc(sizeof(char) * 2048); + while (isdigit(*(line + j)) != 0) { + number[strlen(number)] = line[j]; + // check left and right is symbol or not + int prev = j - 1; + int next = j + 1; + if (prev > 0) { + if (line[prev] != '.' && isdigit(line[prev]) == 0) { + // append to good numbers + append = true; + } + // check if on first line, as we can't go back further then check is previous line previous char is symbol or not + if (i != 0 && lines[i - 1][prev] != '.' && isdigit(lines[i - 1][prev]) == 0) { + append = true; + } + // check if next line exists + if (i != LINE_LENGTH - 1 && lines[i + 1][prev] != '.' && isdigit(lines[i + 1][prev]) == 0) { + append = true; + } + } + if (next <= strlen(line) - 1) { + if (line[next] != '.' && line[next] != '\n' && isdigit(line[next]) == 0) { + append = true; + } + + if (i != 0 && lines[i - 1][next] != '.' && lines[i - 1][next] != '\n' && isdigit(lines[i - 1][next]) == 0) { + append = true; + } + if (i != LINE_LENGTH - 1 && lines[i + 1][next] != '.' && lines[i + 1][next] != '\n' && isdigit(lines[i + 1][next]) == 0) { + append = true; + } + } + if (i != 0 && lines[i - 1][j] != '.' && isdigit(lines[i - 1][j]) == 0) { + append = true; + } + if (i != LINE_LENGTH - 1 && lines[i + 1][j] != '.' && isdigit(lines[i + 1][j]) == 0) { + append = true; + } + j++; + } + if (append) { + goodnumbers[goodnumber_count] = atoi(number); + goodnumber_count++; + append = false; + } + + } + } + int sum = 0; + for (int i = 0; i < goodnumber_count; i++) { + sum += goodnumbers[i]; + } + printf("Sum: %d\n", sum); +} diff --git a/2023/3/2.c b/2023/3/2.c @@ -0,0 +1,90 @@ +#include <stdio.h> +#include <string.h> +#include <stdlib.h> +#include <ctype.h> +#include <stdbool.h> + +typedef struct { + int line; + int index; + int values[9]; +} star; + +int main() { + int LINE_LENGTH = 140; + FILE *inputfile = fopen("./input", "r"); + char line[2048] = { 0 }; + size_t len = 0; + ssize_t read; + if (inputfile == NULL) { + printf("Input file not found. Exiting."); + exit(1); + } + char **lines = malloc(sizeof(char *) * LINE_LENGTH); + int line_count = 0; + while (fgets(line, 1024, inputfile)) { + lines[line_count] = malloc(sizeof(char) * 2048); + strcpy(lines[line_count], line); + line_count++; + } + int range[3] = { -1, 0, 1 }; + star *gears = malloc(sizeof(star) * 4096); + int gear_count = 0; + + int answer = 0; + for (int i = 0; i < LINE_LENGTH; i++) { + int n = 0; + char *line = lines[i]; + line[strlen(line) - 1] = '\0'; + bool havegear = false; + star gear = (star) { 0, 0 }; + for (int j = 0; j < strlen(line); j++) { + if (isdigit(line[j]) != 0) { + n = n * 10 + line[j] - '0'; + for (int ii = 0; ii < 3; ii++) { + for (int jj = 0; jj < 3; jj++) { + if (i + range[ii] >= 0 && i + range[ii] < LINE_LENGTH && j + range[jj] >= 0 && j + range[jj] < strlen(lines[i])) { + char cc = lines[i + range[ii]][j + range[jj]]; + if (cc != '.' && isdigit(cc) == 0 && cc == '*') { + gear = (star) { i + range[ii], j + range[jj], {} }; + havegear = true; + } + } + } + } + } + if (j == strlen(lines[i]) - 1 || isdigit(line[j]) == 0) { + if (havegear) { + int gearcounter = 0; + int found_i = -1; + for (int k = 0; k < gear_count; k++) { + if (gears[k].line == gear.line && gears[k].index == gear.index) { + found_i = k; + break; + } + } + if (found_i == -1) { + gears[gear_count] = gear; + gears[gear_count].values[0] = n; + gear_count++; + } else { + int length = 0; + for (int k = 0; k < 9; k++) { + if (gears[found_i].values[k] != 0) { + length++; + } + } + gears[found_i].values[length] = n; + length += 1; + if (length == 2) { + answer += gears[found_i].values[0] * n; + } + } + havegear = false; + } + n = 0; + } + } + } + printf("Sum: %d\n", answer); +} diff --git a/2023/3/input b/2023/3/input @@ -0,0 +1,140 @@ +..172..............................454..46.......507..........809......923.778..................793..............137.............238........ +............*.........712........=.......*................515.*...........*.......690.........../..........658.........=.........*.......... +.........823.835........%.........710.....749........134..%............................#812...&.....925.../..........276.......386.......... +519..................13......341.................481....=.....$............-.......211.......92.......*..................................... +............832*105..@........$..................*.........797.....535..932.........*....152...........123.........678.540...........-...6.. +....&..948..........................271....-....228..79.26.........................733...=...715............27.586........*.......883...*... +..172.......=..+.............88&....%....340.55.....+.............465..398......=..................585.......*....*812...347................ +...........374.462.......166..................*...........786........*....*910..675.................*.....149................653*....+80.... +.......*............680.....*......876.........864..................259.................124.169....799............608..*.........98......951 +....615.......*....%.....151.........*....#802........$.......680......................../...............857........-.901...............*... +..............3.................637..493...........926....636..*.....350........881.........699......886.../.458...........#..474*409...246. +...&...336......922............*..........370..............$..581....*.....335.*.......608$..*..11.......$....-..........928................ +...50..*.........*...........978...453.....*.......-..22..........298.......*...711.........794...*...267............44*.......460....*..... +...................................*........534..797....-.............61....272.....@874..........892.....707.............230....*..72.537.. +....................405............309..........................221./..*....................872%.......75..*......237.....*................. +..208.176..239.........*172.............795.............670.......*..9..504......*.717..641........908*....975.....*......130............... +.....*....*.......711$....................*..54.....494..../[email protected]*....../.......555..983*...........479..... +.915......670.524................866...862..@.........*../....*...................................72.901..................995..........&.... +...*..%.......*.....71.............*..................33.350.796.....612.............#..463..............*399.....=.......*......309........ 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+..603.389..956.*...........*.......636...866.....338...+25......*...+..........................................667........#..........+..296. +...*............544.....510..418.=....=....*....................379.478.....961.............410&...........413......*912..469..758.733..-... +798....*565.793.............*[email protected]...$...............*..244................%..491.../...................*........... +....546......*....454...120..683.............923.....@...*...865.574......276........56......57.659..*................-...-...512........... +............329...*.................................606.599...................*927..*.........-.......674..*........723..974................ +................378..911........987.....606......................899.73....489......848.....................664...............388......589.. diff --git a/2023/4/1.c b/2023/4/1.c @@ -0,0 +1,138 @@ +#include <stdio.h> +#include <string.h> +#include <stdlib.h> +#include <ctype.h> +#include <stdbool.h> +#include <assert.h> + +char** str_split(char* a_str, const char a_delim) +{ + char** result = 0; + size_t count = 0; + char* tmp = a_str; + char* last_comma = 0; + char delim[2]; + delim[0] = a_delim; + delim[1] = 0; + /* Count how many elements will be extracted. */ + while (*tmp) + { + if (a_delim == *tmp) + { + count++; + last_comma = tmp; + } + tmp++; + } + /* Add space for trailing token. */ + count += last_comma < (a_str + strlen(a_str) - 1); + /* Add space for terminating null string so caller + knows where the list of returned strings ends. */ + count++; + result = malloc(sizeof(char*) * count); + if (result) + { + size_t idx = 0; + char* token = strtok(a_str, delim); + while (token) + { + assert(idx < count); + *(result + idx++) = strdup(token); + token = strtok(0, delim); + } + assert(idx == count - 1); + *(result + idx) = 0; + } + return result; +} + +// Note: This function returns a pointer to a substring of the original string. +// If the given string was allocated dynamically, the caller must not overwrite +// that pointer with the returned value, since the original pointer must be +// deallocated using the same allocator with which it was allocated. The return +// value must NOT be deallocated using free() etc. +char *trimwhitespace(char *str) +{ + char *end; + + // Trim leading space + while(isspace((unsigned char)*str)) str++; + + if(*str == 0) // All spaces? + return str; + + // Trim trailing space + end = str + strlen(str) - 1; + while(end > str && isspace((unsigned char)*end)) end--; + + // Write new null terminator character + end[1] = '\0'; + + return str; +} + +int main() { + FILE *inputfile = fopen("./input", "r"); + char line[2048] = { 0 }; + size_t len = 0; + ssize_t read; + if (inputfile == NULL) { + printf("Input file not found. Exiting."); + exit(1); + } + char **lines = malloc(sizeof(char *) * 1024); + int total = 0; + while (fgets(line, 2048, inputfile)) { + char **split = str_split(line, '|'); + char *left = split[0]; + char *right = split[1]; + + int *win_num = malloc(sizeof(int) * 1024); + char *winning_numbers = str_split(left, ':')[1]; + winning_numbers = trimwhitespace(winning_numbers); + // check consecutive space then shift characters to left + for (int i = 0; i < strlen(winning_numbers); i++) { + if (winning_numbers[i] == ' ' && winning_numbers[i + 1] == ' ') { + // shift chracters to left + for (int j = i; j < strlen(winning_numbers); j++) { + winning_numbers[j] = winning_numbers[j + 1]; + } + } + } + char **winning_numbers_split = str_split(winning_numbers, ' '); + int winning_count = 0; + while (winning_numbers_split[winning_count] != NULL) { + win_num[winning_count] = atoi(winning_numbers_split[winning_count]); + winning_count++; + } + int *gambled_num = malloc(sizeof(int) * 1024); + right = trimwhitespace(right); + // check consecutive space then shift characters to left + for (int i = 0; i < strlen(right); i++) { + if (right[i] == ' ' && right[i + 1] == ' ') { + // shift chracters to left + for (int j = i; j < strlen(right); j++) { + right[j] = right[j + 1]; + } + } + } + + char **gambled_numbers = str_split(right, ' '); + int gambled_count = 0; + int score = 0; + while (gambled_numbers[gambled_count] != NULL) { + int winning_counter = 0; + gambled_num[gambled_count] = atoi(gambled_numbers[gambled_count]); + while (win_num[winning_counter] != NULL) { + if (gambled_num[gambled_count] == win_num[winning_counter]) { + if (score != 1 && score > 0) score *= 2; + else score++; + } + winning_counter++; + } + gambled_count++; + } + total += score; + } + printf("Sum: %d\n", total); +} diff --git a/2023/4/2.c b/2023/4/2.c @@ -0,0 +1,88 @@ +#include "../../lib/util.h" + +#include <stdio.h> +#include <string.h> +#include <stdlib.h> +#include <stdbool.h> + +int main() { + int LINES = 199; + FILE *inputfile = fopen("./input", "r"); + char line[2048] = { 0 }; + size_t len = 0; + ssize_t read; + if (inputfile == NULL) { + printf("Input file not found. Exiting."); + exit(1); + } + char lines[LINES][2048]; + int cards[LINES]; + for (int i = 0; i < LINES; i++) { + cards[i] = 0; + } + int line_count = 0; + while (fgets(line, 2048, inputfile)) { + cards[line_count] += 1; + strcpy(lines[line_count], line); + char copied_line[2048]; + strcpy(copied_line, line); + char **split = str_split(copied_line, '|'); + char *left = split[0]; + char *right = split[1]; + int *win_num = malloc(sizeof(int) * 1024); + char *winning_numbers = str_split(left, ':')[1]; + winning_numbers = trimwhitespace(winning_numbers); + // check consecutive space then shift characters to left + for (int i = 0; i < strlen(winning_numbers); i++) { + if (winning_numbers[i] == ' ' && winning_numbers[i + 1] == ' ') { + // shift chracters to left + for (int j = i; j < strlen(winning_numbers); j++) { + winning_numbers[j] = winning_numbers[j + 1]; + } + } + } + + char **winning_numbers_split = str_split(winning_numbers, ' '); + int winning_count = 0; + while (winning_numbers_split[winning_count] != NULL) { + win_num[winning_count] = atoi(winning_numbers_split[winning_count]); + winning_count++; + } + + int *gambled_num = malloc(sizeof(int) * 1024); + // check consecutive space then shift characters to left + for (int i = 0; i < strlen(right); i++) { + if (right[i] == ' ' && right[i + 1] == ' ') { + // shift chracters to left + for (int j = i; j < strlen(right); j++) { + right[j] = right[j + 1]; + } + } + } + right = trimwhitespace(right); + char **gambled_numbers = str_split(right, ' '); + int gambled_count = 0; + int score = 0; + int matches = 0; + while (gambled_numbers[gambled_count] != NULL) { + int winning_counter = 0; + gambled_num[gambled_count] = atoi(gambled_numbers[gambled_count]); + while (win_num[winning_counter] != NULL) { + if (gambled_num[gambled_count] == win_num[winning_counter]) { + matches++; + } + winning_counter++; + } + gambled_count++; + } + for (int i = 1; i < matches + 1; i++) { + cards[line_count + i] += cards[line_count]; + } + line_count++; + } + int total = 0; + for (int i = 0; i < LINES; i++) { + total += cards[i]; + } + printf("Sum: %d\n", total); +} diff --git a/2023/4/input b/2023/4/input @@ -0,0 +1,199 @@ +Card 1: 52 74 9 7 90 77 55 97 31 66 | 29 80 38 92 54 28 36 17 81 19 96 24 64 90 69 86 37 1 94 31 13 84 23 68 58 +Card 2: 19 94 92 73 38 36 84 56 77 11 | 45 2 20 81 76 48 65 42 44 71 59 39 75 37 83 29 52 78 70 87 54 64 47 63 74 +Card 3: 91 11 74 58 59 60 50 44 2 14 | 53 94 58 35 73 80 71 9 74 44 66 40 95 50 42 91 2 24 60 59 11 14 37 5 45 +Card 4: 65 93 62 18 29 95 8 79 60 16 | 78 62 68 4 96 8 57 95 79 75 72 60 74 16 55 39 76 71 65 18 53 93 28 90 29 +Card 5: 98 19 69 18 44 42 74 8 64 90 | 14 49 90 75 53 42 19 64 39 43 8 28 96 81 50 67 74 21 29 1 45 69 98 68 89 +Card 6: 98 60 96 86 73 55 89 59 68 51 | 91 55 60 79 56 23 98 28 99 89 1 49 25 32 29 27 50 86 96 30 59 24 65 53 41 +Card 7: 19 4 6 90 97 27 28 55 23 41 | 11 37 21 63 56 53 5 38 74 44 31 68 54 3 35 25 71 58 2 66 9 87 30 67 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+#include <stddef.h> +#include <string.h> +#include <stdlib.h> +#include <assert.h> +#include <ctype.h> + +char **str_split(char* a_str, const char a_delim) +{ + char** result = 0; + size_t count = 0; + char* tmp = a_str; + char* last_comma = 0; + char delim[2]; + delim[0] = a_delim; + delim[1] = 0; + /* Count how many elements will be extracted. */ + while (*tmp) + { + if (a_delim == *tmp) + { + count++; + last_comma = tmp; + } + tmp++; + } + /* Add space for trailing token. */ + count += last_comma < (a_str + strlen(a_str) - 1); + /* Add space for terminating null string so caller + knows where the list of returned strings ends. */ + count++; + result = malloc(sizeof(char*) * count); + if (result) + { + size_t idx = 0; + char* token = strtok(a_str, delim); + while (token) + { + assert(idx < count); + *(result + idx++) = strdup(token); + token = strtok(0, delim); + } + assert(idx == count - 1); + *(result + idx) = 0; + } + return result; +} + +// Note: This function returns a pointer to a substring of the original string. +// If the given string was allocated dynamically, the caller must not overwrite +// that pointer with the returned value, since the original pointer must be +// deallocated using the same allocator with which it was allocated. The return +// value must NOT be deallocated using free() etc. +char *trimwhitespace(char *str) +{ + char *end; + // Trim leading space + while(isspace((unsigned char)*str)) str++; + if(*str == 0) // All spaces? + return str; + // Trim trailing space + end = str + strlen(str) - 1; + while(end > str && isspace((unsigned char)*end)) end--; + // Write new null terminator character + end[1] = '\0'; + return str; +} diff --git a/lib/util.h b/lib/util.h @@ -0,0 +1,4 @@ + +char** str_split(char* a_str, const char a_delim); +char* trimwhitespace(char *str); +