diff --git a/data_structures/skip_list.cpp b/data_structures/skip_list.cpp
index 723958866..550a5c9d3 100644
--- a/data_structures/skip_list.cpp
+++ b/data_structures/skip_list.cpp
@@ -9,6 +9,8 @@
 #include <vector>
 #include <stdio.h>
 #include <string.h>
+#include <stdlib.h>
+#include <time.h>   
 // using namespace std; 
 using std::vector;
 using std::endl;
@@ -58,6 +60,8 @@ SkipList::SkipList() {
     header = new Node(-1, MAXLVL, NULL); 
 } 
 
+
+
   
 /**
  * Returns random level for skip list;
@@ -187,4 +191,6 @@ int main()
 
     lst.displayList();
 
+
+
 }