2022-03

src/2022/03.c

@@ -1,12 +1,66 @@
 #include <stdio.h>
-#include <stdlib.h>
+#include <string.h>
 
 #include "lfinput.h"
 
+static int part_one(char **input, size_t sz) {
+    int score = 0;
+
+    for (size_t i = 0; i < sz; ++i) {
+        size_t l = strlen(input[i]) / 2;
+        for (size_t x = 0; x < l; ++x) {
+            for (char *y = input[i] + l; *y != '\0'; ++y) {
+                if (input[i][x] == *y) {
+                    if (*y >= 'a' && *y <= 'z') {
+                        score += *y - 'a' + 1;
+                    } else {
+                        score += *y - 'A' + 27;
+                    }
+                    goto NEXT_P1;
+                }
+            }
+        }
+        NEXT_P1:
+        continue;
+    }
+
+    return score;
+}
+
+static int part_two(char **input, size_t sz) {
+    int score = 0;
+
+    for (size_t i = 0; i < sz; i += 3) {
+        char found = 'a';
+        for (char *a = input[i]; *a != '\0'; ++a) {
+            for (char *b = input[i + 1]; *b != '\0'; ++b) {
+                if (*a == *b) {
+                    for (char *c = input[i + 2]; *c != '\0'; ++c) {
+                        if (*a == *c) {
+                            found = *c;
+                            goto FOUND_SAME;
+                        }
+                    }
+                }
+            }
+        }
+        FOUND_SAME:
+        if (found >= 'a' && found <= 'z') {
+            score += found - 'a' + 1;
+        } else {
+            score += found - 'A' + 27;
+        }
+    }
+
+    return score;
+}
+
 void advent2022day03(void) {
     size_t sz = 0;
     char **input = get_lines("input/2022/03", &sz);
 
+    printf("%d\n", part_one(input, sz));
+    printf("%d\n", part_two(input, sz));
 
     del_lines(input);
 }