segfault...:(

day-2/Makefile

@@ -0,0 +1,7 @@
+.PHONY: all
+
+all:
+	mkdir -p ./bin
+	gcc ./src/main.c -o ./bin/main
+	./bin/main
+

day-2/src/input.txt

@@ -0,0 +1,100 @@
+Game 1: 2 red, 2 green; 1 red, 1 green, 2 blue; 3 blue, 3 red, 3 green; 1 blue, 3 green, 7 red; 5 red, 3 green, 1 blue
+Game 2: 5 green, 4 red, 7 blue; 7 red, 4 green, 4 blue; 8 green, 11 blue, 4 red; 2 red, 18 blue, 3 green; 7 red, 15 blue
+Game 3: 2 green, 4 blue; 2 red, 2 green; 6 red, 1 green; 2 red, 1 green; 2 green; 5 blue, 5 red
+Game 4: 10 red, 7 green, 10 blue; 8 red, 2 green; 9 green, 6 red, 5 blue; 8 green, 2 blue, 4 red; 5 green, 9 blue; 10 red, 1 green, 9 blue
+Game 5: 10 blue, 7 green, 2 red; 2 blue, 4 red; 2 green, 9 blue, 8 red
+Game 6: 3 green, 8 red; 1 blue, 11 red, 2 green; 2 green, 15 red, 8 blue; 13 red, 6 blue, 3 green
+Game 7: 4 green, 10 red, 7 blue; 6 red, 9 blue, 9 green; 2 red, 1 blue, 6 green
+Game 8: 1 red, 3 blue, 2 green; 7 green, 2 blue; 10 green, 1 red, 2 blue; 1 red
+Game 9: 4 red, 3 green, 11 blue; 6 red, 4 green; 15 red, 7 blue, 7 green
+Game 10: 7 red, 1 blue, 5 green; 11 red, 7 green, 1 blue; 2 green, 4 blue, 13 red
+Game 11: 2 blue, 13 red, 12 green; 6 green, 5 red, 4 blue; 5 red, 11 green
+Game 12: 7 blue, 3 red, 11 green; 5 red, 1 blue, 8 green; 9 green, 7 blue, 8 red
+Game 13: 1 blue, 12 red; 9 red, 1 green, 1 blue; 8 red; 1 green, 4 red; 2 red
+Game 14: 6 blue, 5 green, 1 red; 12 blue, 4 red, 9 green; 7 green, 6 red; 8 blue, 10 green, 4 red; 8 green, 7 red
+Game 15: 15 blue, 10 red, 3 green; 9 green, 6 red, 11 blue; 3 green, 8 red, 5 blue; 12 green, 6 red, 16 blue; 11 red, 9 green, 15 blue
+Game 16: 12 green, 2 red, 7 blue; 9 red, 6 blue, 9 green; 7 green, 10 blue; 9 blue, 3 red, 9 green; 5 blue, 1 red
+Game 17: 4 green, 3 red, 11 blue; 8 green, 16 blue; 10 green, 12 blue, 2 red; 8 green, 2 red, 15 blue
+Game 18: 6 red, 8 green; 16 blue; 4 blue, 6 red; 16 blue, 10 green, 3 red; 12 blue, 15 green; 9 blue, 1 green, 4 red
+Game 19: 9 green, 9 red; 4 green, 13 red, 2 blue; 2 blue, 4 green, 3 red; 5 green, 3 blue, 3 red
+Game 20: 1 green, 6 red, 12 blue; 3 green, 8 red, 11 blue; 7 green, 5 red, 2 blue; 5 green, 14 blue, 5 red
+Game 21: 5 green, 1 blue, 13 red; 3 green, 13 red, 2 blue; 8 green, 12 red, 3 blue; 3 blue, 6 green, 9 red; 1 blue, 4 green, 13 red
+Game 22: 8 green, 14 red, 15 blue; 10 blue, 8 red, 14 green; 15 green, 15 blue, 6 red; 14 green, 10 blue, 7 red
+Game 23: 18 red, 9 green; 3 green, 1 blue, 17 red; 10 red, 16 green
+Game 24: 1 red, 2 blue, 4 green; 2 red, 5 blue, 3 green; 5 green, 5 blue; 8 blue, 1 red, 3 green; 2 green, 2 red, 6 blue; 2 green, 4 blue
+Game 25: 5 blue, 4 red, 1 green; 4 blue, 8 red, 1 green; 6 red, 5 blue; 8 red; 9 red, 3 blue; 1 green, 3 blue, 5 red
+Game 26: 20 blue, 4 red, 15 green; 10 red, 2 green, 12 blue; 7 blue, 15 green, 9 red; 1 red, 10 green, 5 blue; 14 green, 7 red, 15 blue
+Game 27: 17 red, 6 green; 6 green, 5 red, 3 blue; 4 green, 4 red, 5 blue; 3 green, 3 blue, 16 red; 4 blue, 5 green, 15 red
+Game 28: 5 blue, 6 green, 1 red; 13 blue; 1 red, 9 blue, 10 green
+Game 29: 1 red, 10 blue; 9 green, 6 blue, 3 red; 17 green, 1 red, 9 blue; 7 blue, 1 red; 1 red, 15 blue, 9 green; 7 green, 1 red, 4 blue
+Game 30: 3 red, 11 blue, 2 green; 11 green, 8 blue, 8 red; 1 red, 3 green; 19 green, 11 blue
+Game 31: 19 green, 6 red; 4 green, 10 red; 12 green, 1 blue
+Game 32: 4 green, 3 blue, 10 red; 4 red, 6 blue, 3 green; 10 red, 5 blue
+Game 33: 2 blue, 5 green, 5 red; 4 blue, 2 green, 4 red; 13 red, 2 green; 7 blue, 4 green, 2 red; 19 blue, 5 green, 11 red; 4 green, 18 blue, 1 red
+Game 34: 6 blue, 9 red, 7 green; 7 green, 6 red, 12 blue; 3 red, 6 green, 16 blue; 3 green, 15 blue, 13 red; 2 green, 16 blue, 3 red
+Game 35: 4 green; 3 green, 4 red, 1 blue; 6 red, 12 green, 2 blue
+Game 36: 1 blue, 8 red, 3 green; 10 red, 5 green; 1 green, 8 red; 4 green, 1 blue, 11 red
+Game 37: 2 red, 4 blue, 5 green; 2 green, 1 blue, 3 red; 8 green, 3 red, 4 blue; 1 blue, 8 green, 2 red
+Game 38: 11 green, 4 blue; 2 blue, 11 green, 1 red; 12 green, 7 blue, 1 red; 7 blue, 10 green, 1 red; 13 green, 2 red; 1 red, 7 blue, 2 green
+Game 39: 7 green, 1 red, 15 blue; 8 red, 7 blue; 15 red, 5 green, 6 blue
+Game 40: 2 green, 12 blue, 15 red; 2 green, 6 red; 5 green, 9 red; 9 blue, 12 red; 4 green, 12 red, 12 blue; 12 red, 8 blue, 2 green
+Game 41: 9 blue, 6 red, 3 green; 6 red, 2 green, 9 blue; 1 blue, 11 red
+Game 42: 4 red, 3 blue, 13 green; 5 blue, 11 red, 15 green; 3 red, 12 green; 2 red, 6 blue, 3 green
+Game 43: 2 green, 7 red; 11 red, 18 green, 1 blue; 13 red, 12 green, 1 blue; 15 red; 5 red, 19 green; 15 green, 5 red
+Game 44: 2 red, 5 green, 7 blue; 5 green, 8 blue; 8 red, 8 green; 1 green, 1 red, 6 blue; 1 blue, 1 red
+Game 45: 3 red, 3 green, 7 blue; 12 red, 17 blue; 7 green, 8 red, 14 blue; 9 green, 10 red, 13 blue; 15 green, 16 blue, 4 red
+Game 46: 2 blue, 5 green; 4 red, 7 green; 15 red, 7 green
+Game 47: 5 red, 9 green, 4 blue; 1 red, 9 green, 11 blue; 8 green, 1 red; 4 red, 4 blue, 3 green; 10 blue, 14 green
+Game 48: 1 red, 14 blue, 11 green; 3 blue, 8 green; 5 green, 5 blue; 5 blue, 1 red, 8 green; 10 green, 2 red, 6 blue
+Game 49: 11 blue, 5 red, 3 green; 7 blue, 12 red, 4 green; 9 green, 6 red; 4 green, 3 blue, 10 red
+Game 50: 3 red, 8 blue, 13 green; 13 blue, 13 green; 3 green, 10 blue, 1 red; 12 green, 15 blue; 12 blue, 3 red, 8 green; 5 blue, 5 red, 4 green
+Game 51: 3 green, 1 blue; 1 red; 1 green, 7 blue
+Game 52: 3 red, 4 blue; 4 blue, 1 green, 2 red; 1 green, 3 red; 5 red, 1 green; 1 blue, 1 red, 1 green
+Game 53: 5 red, 17 green, 4 blue; 15 red, 14 blue, 1 green; 9 blue, 5 green; 3 blue, 5 red, 9 green; 1 green, 15 blue, 10 red; 16 green, 10 blue
+Game 54: 4 blue, 7 red, 1 green; 7 green, 8 red, 6 blue; 14 green, 1 blue, 5 red
+Game 55: 4 blue, 4 green, 1 red; 1 green; 3 red
+Game 56: 3 green, 1 red, 7 blue; 1 blue, 2 red, 3 green; 2 green, 9 red; 14 red, 8 blue, 1 green; 5 red, 13 blue; 6 red, 3 blue
+Game 57: 15 green, 5 red, 5 blue; 13 green, 13 blue, 12 red; 18 green, 5 blue, 8 red; 7 green, 7 blue, 13 red
+Game 58: 4 red, 2 blue, 6 green; 4 red, 3 green, 14 blue; 9 green, 3 red; 3 red, 5 blue, 11 green
+Game 59: 2 red, 6 green, 1 blue; 5 blue, 1 green, 4 red; 2 red, 7 green, 6 blue; 3 green, 6 blue; 1 blue, 6 green
+Game 60: 4 red, 9 green, 3 blue; 2 blue, 8 green, 6 red; 2 red, 8 green, 3 blue; 8 green, 2 red, 2 blue
+Game 61: 12 red, 4 blue, 3 green; 1 blue, 2 green; 2 red, 2 green, 3 blue
+Game 62: 4 red, 6 green, 14 blue; 12 green, 2 red, 4 blue; 5 blue, 5 red, 7 green
+Game 63: 1 green, 5 red; 5 red, 1 blue, 1 green; 1 blue
+Game 64: 6 red, 9 green, 4 blue; 8 red, 13 green; 3 blue, 8 red, 11 green; 5 red, 1 blue, 2 green; 3 blue, 7 red, 1 green
+Game 65: 15 green, 10 red, 1 blue; 1 blue, 2 red, 4 green; 10 blue, 4 green
+Game 66: 13 blue, 6 red, 2 green; 13 green; 10 blue, 8 green; 7 red, 10 blue, 11 green; 10 green, 1 red, 8 blue
+Game 67: 5 blue, 4 green, 1 red; 2 green, 4 blue, 1 red; 7 green, 2 blue, 1 red; 1 blue, 1 green
+Game 68: 2 green, 12 blue, 3 red; 5 red, 14 blue, 2 green; 6 red, 14 blue; 10 blue, 6 red, 2 green
+Game 69: 7 blue, 1 red, 12 green; 10 blue, 11 green, 6 red; 4 red, 10 green, 7 blue
+Game 70: 4 blue; 6 red, 2 green, 11 blue; 4 green, 3 blue, 2 red; 14 blue, 2 red, 4 green
+Game 71: 5 red, 17 blue; 9 blue, 11 red, 1 green; 19 blue, 6 red; 4 red, 2 blue
+Game 72: 2 green, 5 red, 1 blue; 4 green, 4 red; 4 green, 2 red; 2 blue, 2 green; 1 blue, 1 green, 5 red
+Game 73: 4 red, 3 blue, 1 green; 10 red, 2 blue, 3 green; 14 red, 1 green, 2 blue; 1 blue; 3 green, 9 red, 6 blue; 11 red, 7 blue, 2 green
+Game 74: 1 red, 5 blue, 10 green; 2 red, 9 blue, 9 green; 8 green, 2 red, 4 blue; 10 blue, 9 green; 12 green, 3 red, 5 blue
+Game 75: 3 red, 13 blue, 6 green; 3 green, 1 red; 9 green, 1 blue, 5 red; 5 green, 13 red, 4 blue; 13 green, 2 blue, 10 red; 9 green, 3 red, 10 blue
+Game 76: 14 green, 2 red, 16 blue; 2 blue, 1 red, 7 green; 14 green, 9 blue, 8 red
+Game 77: 1 green, 1 blue; 1 green; 3 red, 3 blue, 1 green; 3 green, 3 red; 1 red, 2 blue
+Game 78: 4 red, 13 green; 17 green, 1 blue, 2 red; 8 red, 14 green
+Game 79: 4 green, 10 red, 6 blue; 5 blue, 3 red, 7 green; 6 blue, 2 red, 4 green; 2 blue, 8 red
+Game 80: 19 green, 5 red; 5 green, 9 blue; 3 red, 18 blue, 10 green; 2 red, 15 green, 7 blue; 4 red, 14 green, 15 blue
+Game 81: 10 red, 2 blue, 1 green; 18 red, 3 blue; 6 red, 12 blue; 1 green, 3 red, 3 blue
+Game 82: 8 green, 1 blue; 2 blue, 4 red; 7 green, 1 red, 4 blue; 2 green, 3 red, 2 blue; 3 red; 4 red, 8 green, 1 blue
+Game 83: 3 green, 1 blue; 1 red, 2 blue, 14 green; 8 red, 17 green
+Game 84: 7 green, 4 blue, 4 red; 11 green, 17 red, 11 blue; 9 green, 5 blue, 14 red; 9 green, 10 blue, 5 red
+Game 85: 1 red, 1 green; 1 blue, 8 red, 1 green; 8 green, 1 red; 8 green, 2 red, 1 blue
+Game 86: 1 red, 5 blue, 1 green; 1 green, 7 red; 8 red; 3 blue, 2 red
+Game 87: 7 red, 8 blue, 1 green; 8 red, 6 green; 6 red, 8 green, 10 blue
+Game 88: 5 red, 4 green, 5 blue; 1 blue, 2 green; 6 green, 10 blue, 4 red; 1 red, 8 green, 1 blue
+Game 89: 3 green, 7 blue, 11 red; 1 blue, 5 green, 18 red; 1 blue, 3 green, 13 red; 7 blue, 9 green, 3 red; 1 green, 8 blue, 19 red; 4 blue, 15 red, 1 green
+Game 90: 3 blue, 3 red, 4 green; 14 red, 6 green, 4 blue; 1 blue, 9 red; 6 red, 1 green; 5 green, 8 red, 2 blue; 3 blue, 4 red, 3 green
+Game 91: 1 red, 1 blue, 16 green; 8 red, 5 green; 1 blue, 2 red, 10 green; 3 red, 15 green, 1 blue
+Game 92: 10 green, 12 blue; 6 red, 6 blue; 5 red, 12 blue; 6 red, 9 green, 2 blue; 10 blue, 3 red, 1 green; 1 red, 19 blue, 11 green
+Game 93: 4 green; 5 green, 2 blue, 3 red; 1 blue, 3 red, 6 green; 2 blue, 2 red, 7 green
+Game 94: 4 blue, 2 red; 6 green, 6 blue, 4 red; 8 green, 1 blue, 3 red
+Game 95: 6 green, 4 blue, 15 red; 13 red, 7 blue, 3 green; 14 red, 5 blue, 6 green; 5 blue, 7 red, 2 green
+Game 96: 1 red, 1 blue, 11 green; 6 blue, 2 red, 14 green; 3 green, 2 red; 9 blue, 10 green
+Game 97: 10 green; 2 red, 4 green, 1 blue; 2 green, 1 red; 2 red, 1 blue, 10 green; 1 green
+Game 98: 1 green, 5 blue; 2 green, 7 blue, 4 red; 2 red, 1 green, 9 blue; 4 blue, 4 red
+Game 99: 3 green, 1 red, 3 blue; 12 green, 12 blue, 4 red; 12 blue, 2 red, 10 green; 4 blue, 2 red, 4 green
+Game 100: 1 red, 5 blue, 2 green; 3 red, 1 blue; 1 green, 1 blue, 1 red

day-2/src/main.c

@@ -0,0 +1,158 @@
+
+#include <ctype.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+const char *read_input(const char *file_name) {
+  FILE *fileptr;
+
+  fileptr = fopen(file_name, "r");
+
+  if (fileptr) {
+    // read entire file into a buffer on heap
+    char *buffer = 0;
+    long length;
+    fseek(fileptr, 0, SEEK_END);
+    length = ftell(fileptr);
+    fseek(fileptr, 0, SEEK_SET);
+    buffer = malloc(length);
+    if (buffer) {
+      fread(buffer, 1, length, fileptr);
+    }
+    fclose(fileptr);
+
+    return buffer;
+  } else {
+    printf("not able to open file");
+  }
+
+  fclose(fileptr);
+
+  return "";
+}
+
+struct Game {
+  int id;
+  // the max number of each color for any one turn
+  int max_red;
+  int max_green;
+  int max_blue;
+};
+
+struct Game parse_game(const char *game) {
+  char *token;
+  char *saveptr = NULL;
+
+  token = strtok_r(game, ":", &saveptr);
+  int gameId = atoi(token + 5);
+
+  int max_red = 0, max_green = 0, max_blue = 0;
+
+  token = strtok_r(NULL, ";", &saveptr);
+  while (token != NULL) {
+    // printf("Token: %s\n", token);
+
+    char *colorToken = token;
+    // Find the position of the first non-digit character
+    while (*colorToken && isdigit(*colorToken)) {
+      colorToken++;
+    }
+
+    // Check if a non-digit character was found
+    if (*colorToken) {
+      // Trim any leading whitespace after the number
+      while (*colorToken == ' ') {
+        colorToken++;
+      }
+
+      // Get the number
+      int num = atoi(token);
+
+      // Get the color
+      char *color = colorToken;
+      // printf("Num: %d\n", num);
+      // printf("Color: %s\n", color);
+
+      if (strcmp(color, "red") == 0) {
+        if (num > max_red) {
+          max_red = num;
+        }
+      } else if (strcmp(color, "green") == 0) {
+        if (num > max_green) {
+          max_green = num;
+        }
+      } else if (strcmp(color, "blue") == 0) {
+        if (num > max_blue) {
+          max_blue = num;
+        }
+      }
+    }
+
+    token = strtok_r(NULL, ";", &saveptr);
+  }
+
+  return (struct Game){gameId, max_red, max_green, max_blue};
+}
+
+const int MAX_GREEN = 13;
+const int MAX_BLUE = 14;
+const int MAX_RED = 12;
+// if the game is possible, then it returns the id of the game
+// otherwise returns 0
+int is_game_possible(const char *game) {
+  struct Game gameNumbers = parse_game(game);
+
+  if (gameNumbers.max_red > MAX_RED) {
+    return 0;
+  }
+
+  if (gameNumbers.max_green > MAX_GREEN) {
+    return 0;
+  }
+
+  if (gameNumbers.max_blue > MAX_BLUE) {
+    return 0;
+  }
+
+  return gameNumbers.id;
+}
+
+int test() {
+  char *input = read_input("./src/test_input.txt");
+
+  // go through each line
+  char *saveptr = NULL;
+  char *curr_line = strtok_r(input, "\n", &saveptr);
+  int total = 0;
+
+  while (curr_line != NULL) {
+    printf("curr_line: %s\n", curr_line);
+
+    char *copy;
+    strcpy(copy, curr_line);
+
+    int game_id = is_game_possible(copy);
+    printf("game_id: %d\n", game_id);
+
+    total += game_id;
+
+    curr_line = strtok_r(NULL, "\n", &saveptr);
+  }
+
+  printf("total: %d\n", total);
+
+  return total == 8;
+}
+
+int main() {
+  printf("Hello, world!\n");
+
+  const char *input = read_input("./src/input.txt");
+
+  int test_result = test();
+  printf("test result: %d\n", test_result);
+
+  return 0;
+}

day-2/src/test_input.txt

@@ -0,0 +1,5 @@
+Game 1: 3 blue, 4 red; 1 red, 2 green, 6 blue; 2 green
+Game 2: 1 blue, 2 green; 3 green, 4 blue, 1 red; 1 green, 1 blue
+Game 3: 8 green, 6 blue, 20 red; 5 blue, 4 red, 13 green; 5 green, 1 red
+Game 4: 1 green, 3 red, 6 blue; 3 green, 6 red; 3 green, 15 blue, 14 red
+Game 5: 6 red, 1 blue, 3 green; 2 blue, 1 red, 2 green