feat: day 2

2023-12-03 10:05:54 +01:00
parent 9ca52c19e7
commit 72e3d62ff7
6 changed files with 231 additions and 3 deletions
--- a/day_2.c
+++ b/day_2.c
@@ -0,0 +1,81 @@
+//
+// Created by Lennart on 02/12/2023.
+//
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+#include <stdbool.h>
+#include "input_handler.h"
+
+char *buffer;
+int bufferLen;
+
+#define MAX_RED_CUBES 12
+#define MAX_GREEN_CUBES 13
+#define MAX_BLUE_CUBES 14
+
+#ifdef _WIN32
+#define STRTOK_TS strtok_s
+#else
+#define STRTOK_TS strtok_f
+#endif //_WIN32
+
+void main() {
+    buffer = NULL;
+    FILE *f = fopen("day_2.txt", "r");
+    if(f == NULL) {
+        printf("File not found!");
+        exit(-1);
+    }
+
+    int result1 = 0;
+    int result2 = 0;
+    while(!feof(f)) {
+        char *line = read_line(f, &buffer, &bufferLen);
+        int gameId;
+        sscanf(line, "Game %i: ", &gameId);
+
+        char *sets = &line[strlen("Game : ") + (int) floor(log10(abs(gameId))) + 1];
+        char *set_context;
+        const char *set = STRTOK_TS(sets, ";", &set_context);
+
+        int maxRed = 0, maxGreen = 0, maxBlue = 0;
+        bool fits = true;
+        while(set != NULL) {
+            const char *cube = strtok(set, ",");
+            int red = 0, green = 0, blue = 0;
+            while(cube != NULL) {
+                int amount;
+                char color[10];
+                sscanf(cube, "%i %s", &amount, &color[0]);
+
+                if(strcmp(&color[0], "red") == 0 && (red += amount) > MAX_RED_CUBES) {
+                    fits = false;
+                } else if(strcmp(&color[0], "green") == 0 && (green += amount) > MAX_GREEN_CUBES) {
+                    fits = false;
+                } else if(strcmp(&color[0], "blue") == 0 && (blue += amount) > MAX_BLUE_CUBES) {
+                    fits = false;
+                }
+
+                cube = strtok(NULL, ",");
+            }
+
+            maxRed = red > maxRed ? red : maxRed;
+            maxGreen = green > maxGreen ? green : maxGreen;
+            maxBlue = blue > maxBlue ? blue : maxBlue;
+
+            set = STRTOK_TS(NULL, ";", &set_context);
+        }
+
+        result1 += fits ? gameId : 0;
+        result2 += maxRed * maxGreen * maxBlue;
+    }
+
+    printf("Result #1: %i\n", result1);
+    printf("Result #2: %i\n", result2);
+
+    fclose(f);
+    free(buffer);
+}