diff --git a/d07.cc b/d07.cc
index f65c674..5156595 100644
--- a/d07.cc
+++ b/d07.cc
@@ -2,6 +2,15 @@
 #include <vector>
 #include <map>
 
+//#define BIGBOY
+#if defined(BIGBOY)
+#define TOTAL_SPACE 3000000000
+#define NEEDED_SPACE 700000000
+#else
+#define TOTAL_SPACE 70000000
+#define NEEDED_SPACE 30000000
+#endif
+
 using namespace std;
 
 enum FsNodeType {
@@ -12,13 +21,26 @@ enum FsNodeType {
 struct FsNode {
     FsNodeType type;
     string name;
-    unsigned size;
+    size_t size;
 };
 
 struct FsFile : FsNode {
 };
 
 struct FsDir : FsNode {
+    ~FsDir() {
+        for (auto e : this->entries) {
+            FsNode *node = e.second;
+            if (node->type == NODE_DIR) {
+                FsDir *dir = (FsDir *)node;
+                delete dir;
+            } else if (node->type == NODE_FILE) {
+                FsFile *file = (FsFile *)node;
+                delete file;
+            }
+        }
+        this->entries.clear();
+    }
     FsDir *parent;
     map<string, FsNode *> entries;
 };
@@ -41,9 +63,9 @@ void print_node(FsNode *node, unsigned depth = 0)
     }
 }
 
-unsigned calc_size(FsDir &dir)
+size_t calc_size(FsDir &dir)
 {
-    unsigned size = 0;
+    size_t size = 0;
     for (auto e : dir.entries) {
         FsNode *node = e.second;
 
@@ -76,7 +98,7 @@ FsDir parse()
                 newdir->parent = dir;
                 dir->entries[name] = newdir;
             } else {
-                unsigned size = stoi(first);
+                size_t size = stoll(first);
                 FsFile *newfile = new FsFile;
                 newfile->type = NODE_FILE;
                 newfile->name = name;
@@ -110,9 +132,9 @@ FsDir parse()
     return root;
 }
 
-unsigned p1(const FsDir &dir)
+size_t p1(const FsDir &dir)
 {
-    unsigned count = 0;
+    size_t count = 0;
     if (dir.size <= 100000) count += dir.size;
     for (auto e : dir.entries) {
         FsNode *node = e.second;
@@ -121,42 +143,26 @@ unsigned p1(const FsDir &dir)
     return count;
 }
 
-unsigned p2(const FsDir &dir, unsigned target = 0)
+size_t p2(const FsDir &dir, size_t target = 0)
 {
-    if (!target) target = dir.size - 40000000;
+    if (!target) target = dir.size - (TOTAL_SPACE - NEEDED_SPACE);
 
-    unsigned smallest = 30000000;
+    size_t smallest = NEEDED_SPACE;
     if (dir.size >= target && dir.size < smallest) smallest = dir.size;
 
     for (auto e : dir.entries) {
         FsNode *node = e.second;
         if (node->type == NODE_DIR) {
-            unsigned size = p2(*(FsDir *)node, target);
+            size_t size = p2(*(FsDir *)node, target);
             if (size >= target && size < smallest) smallest = size;
         }
     }
     return smallest;
 }
 
-void free_input(FsDir &dir)
-{
-    for (auto e : dir.entries) {
-        FsNode *node = e.second;
-        if (node->type == NODE_DIR) {
-            FsDir *dir = (FsDir *)node;
-            free_input(*dir);
-            delete dir;
-        } else if (node->type == NODE_FILE) {
-            FsFile *file = (FsFile *)node;
-            delete file;
-        }
-    }
-}
-
 int main()
 {
     auto input = parse();
     cout << p1(input) << endl;
     cout << p2(input) << endl;
-    free_input(input);
 }
diff --git a/d07_bigboy.txt.xz b/d07_bigboy.txt.xz
new file mode 100644
index 0000000..1870660
Binary files /dev/null and b/d07_bigboy.txt.xz differ