1 files changed, 32 insertions, 0 deletions
diff --git a/dotsandboxes/dataStructures.py b/dotsandboxes/dataStructures.py
new file mode 100644
index 0000000..1e972fc
--- /dev/null
+++ b/dotsandboxes/dataStructures.py
@@ -0,0 +1,32 @@
+class DisjointSet:
+    def __init__(self, nbElements):
+        self.parent = []
+        self.rank = []
+        for i in range(0, nbElements):
+            self.parent[i] = i
+            self.rank[i] = 0
+
+    def find(self, x):
+        if self.parent[x] != x:
+            self.parent[x] = self.find(self.parent[x])
+        return self.parent[x]
+
+    def union(self, x, y):
+        xRoot = self.find(x)
+        yRoot = self.find(y)
+
+        # x and y already belong to the same set
+        if xRoot == yRoot:
+            return
+
+        # merge the set of x and y
+        if self.rank[xRoot] < self.rank[yRoot]:
+            self.parent[xRoot] = yRoot
+        elif self.rank[xRoot] > self.rank[yRoot]:
+            self.parent[yRoot] = xRoot
+        else:
+            self.parent[xRoot] = yRoot
+            self.rank[yRoot] += 1
+
+    def inSameSet(self, x, y):
+        return self.find(x) == self.find(y)
+\ No newline at end of file