Add unionFind.c to misc folder

misc/unionFind.c

@@ -0,0 +1,22 @@
+int p[1000000];
+int find(int x)
+{
+  if (p[x] == x)
+  {
+    return x;
+  }
+  else
+  {
+    p[x] = find(p[x]); 
+    return p[x];
+  }
+}
+// Call to function join(int x, int y) to join PARAM x and y
+void join(int x, int y)
+{
+  p[find(x)] = find(y);
+}
+
+int main() {
+    return 0;
+}