Code cleanup

.gitignore

@@ -4,3 +4,4 @@ compile_commands.json
 .cache
 build
 .clangd
+cmake-build-*

.idea/.gitignore

@@ -0,0 +1,8 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

.idea/advent.iml

@@ -0,0 +1,2 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module classpath="CMake" type="CPP_MODULE" version="4" />

.idea/misc.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="CMakeWorkspace" PROJECT_DIR="$PROJECT_DIR$" />
+</project>

.idea/modules.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/advent.iml" filepath="$PROJECT_DIR$/.idea/advent.iml" />
+    </modules>
+  </component>
+</project>

.idea/vcs.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+    <mapping directory="$PROJECT_DIR$/lib/libflint" vcs="Git" />
+  </component>
+</project>

src/2015/01.c

@@ -1,6 +1,5 @@
 #include <stdio.h>
 #include <stdlib.h>
-#include <string.h>
 
 #include "input.h"
 

src/2015/03.c

@@ -1,6 +1,5 @@
 #include <stdio.h>
 #include <stdlib.h>
-#include <string.h>
 
 #include "set.h"
 #include "input.h"
@@ -25,10 +24,18 @@ static int part_two(char *input) {
         is_santa = is_santa == 1 ? 0 : 1;
 
         switch (*c) {
-        case '^': ++(*y); break;
+        case '^':
-        case 'v': --(*y); break;
+            ++(*y);
-        case '>': ++(*x); break;
+            break;
-        case '<': --(*x); break;
+        case 'v':
+            --(*y);
+            break;
+        case '>':
+            ++(*x);
+            break;
+        case '<':
+            --(*x);
+            break;
         }
         set_insert(houses, (void *) new_Point_p(*x, *y));
         ++c;
@@ -49,10 +56,18 @@ static int part_one(char *input) {
 
     while (*c != '\0') {
         switch (*c) {
-        case '^': ++y; break;
+        case '^':
-        case 'v': --y; break;
+            ++y;
-        case '>': ++x; break;
+            break;
-        case '<': --x; break;
+        case 'v':
+            --y;
+            break;
+        case '>':
+            ++x;
+            break;
+        case '<':
+            --x;
+            break;
         }
         set_insert(houses, (void *) new_Point_p(x, y));
         ++c;