1 files changed, 54 insertions, 0 deletions
diff --git a/src/2022/day13/aoc.h b/src/2022/day13/aoc.h
index cfd6a9a..d0749fc 100644
--- a/src/2022/day13/aoc.h
+++ b/src/2022/day13/aoc.h
@@ -2,6 +2,60 @@
 #include <vector>
 
 namespace aoc2022 {
+
+struct packet {
+  enum componet_t {
+    is_int,
+    is_list,
+  };
+
+  struct componet {
+    componet_t t;
+    int v;
+    packet *p;
+  };
+
+  std::vector<componet*> ps;
+
+  void get_number(const char** p, int* d) {
+    const char* p0 = *p;
+    while (*p0 >= '0' && *p0 <= '9') {
+      *d = 10 * (*d) + *p0 - '0';
+      p0++;
+    }
+    *p = p0;
+  }
+
+  void load(const char** p, packet** pp) {
+    const char* p0 = *p;
+    while (*p0 != '\n') {
+      if (*p0 >= '0' && *p0 <= '9') {
+        componet* c = new componet;
+        c->t = is_int;
+        get_number(&p0, &c->v);
+        c->p = nullptr;
+        (*pp)->ps.push_back(c);
+      }
+      else if (*p0 == '[') {
+        componet* c = new componet;
+        c->t = is_list;
+        c->p = new packet;
+        load(&p0, &c->p);
+        (*pp)->ps.push_back(c);
+      }
+      else if (*p0 == ']') {
+        *p = p0;
+        return;
+      } 
+      p0++;
+    }
+  }
+
+  friend bool operator<(const packet& p1, const packet& p2) {
+    return true;
+  }
+};
+
 std::pair<int, int> day13(line_view);
 }