diff --git a/GraphX.java b/GraphX.java
new file mode 100644
index 0000000..422ef2c
--- /dev/null
+++ b/GraphX.java
@@ -0,0 +1,120 @@
+import java.util.*;
+
+//****************BLACKBOX START*****************
+//START COPYING FROM HERE
+
+class HashBox {
+    private final Map<List<Integer>, Integer> map = new HashMap<>();
+    private int cnt = 0;
+
+    int hash(int x) {
+        return hash(new int[]{x, 0, 0});
+    }
+
+    int hash(int x, int y) {
+        return hash(new int[]{x, y, 0});
+    }
+
+    int hash(int x, int y, int z) {
+        return hash(new int[]{x, y, z});
+    }
+
+    private int hash(int[] arr) {
+        List<Integer> key = Arrays.asList(arr[0], arr[1], arr[2]);
+        if (!map.containsKey(key)) {
+            map.put(key, cnt++);
+        }
+        return map.get(key);
+    }
+}
+
+class Graph {
+    boolean directed;
+    HashBox h = new HashBox();
+
+    // Lazy adjacency construction for memory efficiency
+    Map<Integer, ArrayList<Integer>> adj = new HashMap<>();
+
+    Graph(boolean directed) {
+        this.directed = directed;
+    }
+
+    void add_edge(int uR, int vR) {
+        int u = h.hash(uR);
+        int v = h.hash(vR);
+        add_internal(u, v);
+    }
+
+    void add_edge(int u1, int u2, int v1, int v2) {
+        int u = h.hash(u1, u2);
+        int v = h.hash(v1, v2);
+        add_internal(u, v);
+    }
+
+    void add_edge(int u1, int u2, int u3, int v1, int v2, int v3) {
+        int u = h.hash(u1, u2, u3);
+        int v = h.hash(v1, v2, v3);
+        add_internal(u, v);
+    }
+
+    private void add_internal(int u, int v) {
+        adj.computeIfAbsent(u, k -> new ArrayList<>()).add(v);
+        if (!directed) {
+            adj.computeIfAbsent(v, k -> new ArrayList<>()).add(u);
+        }
+    }
+}
+
+class BFS {
+    Graph g;
+    Map<Integer, Integer> dist = new HashMap<>();
+
+    BFS(Graph g) {
+        this.g = g;
+    }
+
+    void run(int sourceR) {
+        int src = g.h.hash(sourceR);
+        run_internal(src);
+    }
+
+    void run(int x, int y) {
+        int src = g.h.hash(x, y);
+        run_internal(src);
+    }
+
+    void run(int x, int y, int z) {
+        int src = g.h.hash(x, y, z);
+        run_internal(src);
+    }
+
+    private void run_internal(int src) {
+        Queue<Integer> q = new ArrayDeque<>();
+        q.add(src);
+        dist.clear();
+        dist.put(src, 0);
+
+        while (!q.isEmpty()) {
+            int cur = q.poll();
+            for (int nxt : g.adj.getOrDefault(cur, Collections.emptyList())) {
+                if (!dist.containsKey(nxt)) {
+                    dist.put(nxt, dist.get(cur) + 1);
+                    q.add(nxt);
+                }
+            }
+        }
+    }
+
+    int min_dist(int targetR) {
+        int t = g.h.hash(targetR);
+        return dist.getOrDefault(t, -1);
+    }
+
+    boolean is_visited(int targetR) {
+        int t = g.h.hash(targetR);
+        return dist.containsKey(t);
+    }
+}
+
+//END COPYING HERE
+//****************BLACKBOX END******************
diff --git a/GraphX.py b/GraphX.py
new file mode 100644
index 0000000..b261db7
--- /dev/null
+++ b/GraphX.py
@@ -0,0 +1,59 @@
+from collections import deque, defaultdict
+
+#****************BLACKBOX START*****************
+#START COPYING FROM HERE
+
+class Hash:
+    def __init__(self):
+        self.mp = {}
+        self.cnt = 0
+
+    def hash(self, *args):
+        key = tuple(args) + (0,) * (3 - len(args))
+        if key not in self.mp:
+            self.mp[key] = self.cnt
+            self.cnt += 1
+        return self.mp[key]
+
+
+class Graph:
+    def __init__(self, directed=True):
+        self.directed = directed
+        self.h = Hash()
+        self.adj = defaultdict(list)
+
+    def add_edge(self, uR, vR):
+        u = self.h.hash(*uR) if isinstance(uR, tuple) else self.h.hash(uR)
+        v = self.h.hash(*vR) if isinstance(vR, tuple) else self.h.hash(vR)
+        self.adj[u].append(v)
+        if not self.directed:
+            self.adj[v].append(u)
+
+
+class BFS:
+    def __init__(self, g):
+        self.g = g
+        self.dist = {}
+
+    def run(self, sourceR):
+        src = self.g.h.hash(*sourceR) if isinstance(sourceR, tuple) else self.g.h.hash(sourceR)
+        self.dist = {src: 0}
+        q = deque([src])
+
+        while q:
+            cur = q.popleft()
+            for nxt in self.g.adj[cur]:
+                if nxt not in self.dist:
+                    self.dist[nxt] = self.dist[cur] + 1
+                    q.append(nxt)
+
+    def min_dist(self, targetR):
+        t = self.g.h.hash(*targetR) if isinstance(targetR, tuple) else self.g.h.hash(targetR)
+        return self.dist.get(t, -1)
+
+    def is_visited(self, targetR):
+        t = self.g.h.hash(*targetR) if isinstance(targetR, tuple) else self.g.h.hash(targetR)
+        return t in self.dist
+
+#END COPYING HERE
+#****************BLACKBOX END******************