clean up

day3.c

@@ -2,7 +2,6 @@
 #include <stdio.h>
 #include <string.h>
 #include <stdint.h>
-#include <arpa/inet.h>
 
 #define INPUT "inputs/input-day3"
 
@@ -63,8 +62,8 @@ load_all(int count)
     return i;
 }
 
-int
-main()
+void
+first()
 {
     int cnt = count_lines();
     uint16_t *v = load_all(cnt);
@@ -94,8 +93,47 @@ main()
     print_bits(gamma, 16);
     print_bits(epsilon, 16);
     printf("result: %d\n", gamma * epsilon);
-
     free(v);
+}
+
+void
+second()
+{
+    int cnt = count_lines();
+    uint16_t *v = load_all(cnt);
+
+    uint16_t gamma = 0;
+    uint16_t epsilon = 0;
+
+    for(int z = 0; z < 12; ++z) {
+        int high = 0;
+        int low = 0;
+        for(int i = 0; i < cnt; ++i) {
+            int bit = BIT_CHECK(v[i], z);
+            if(bit) {
+                high++;
+            } else {
+                low++;
+            }
+        }
+        if(high > low) {
+            BIT_SET(gamma, (11-z));
+        } else {
+            BIT_SET(epsilon, (11-z));
+        }
+    }
+
+    printf("gamma: %d\nepsilon: %d\n", gamma, epsilon);
+    print_bits(gamma, 16);
+    print_bits(epsilon, 16);
+    printf("result: %d\n", gamma * epsilon);
+    free(v);
+}
+
+int
+main()
+{
+    first();
     
     return 0;
 }