Update huffman_coding.cpp

imports

greedy_problems/huffman_coding.cpp

@@ -10,7 +10,7 @@
  * with smaller bit strings; and less frequently occurring letters such as q and x with longer bit strings.
  * More details: https://www.cs.duke.edu/csed/poop/huff/info/
  */
-
+/* imports*/
 #include <iostream>
 #include <queue>
 #include <vector>
@@ -97,4 +97,4 @@ int main()
 
     generateHuffmanCode(data, frequencies);
     return 0;
-}
+}