diff --git a/adl.cpp b/adl.cpp
new file mode 100644
index 0000000..f8969e1
--- /dev/null
+++ b/adl.cpp
@@ -0,0 +1,76 @@
+#include<iostream>
+#include<algorithm>
+
+#include "adl.hpp"
+#include "adjacent.hpp"
+
+Adl::Adl(){
+}
+
+Adl::~Adl(){
+
+}
+
+static bool
+adjacent_compare(Adjacent& adj1, Adjacent& adj2){
+	return adj1.getAdjacentName()==adj2.getAdjacentName();
+}
+
+int
+Adl::insert(Adjacent& adj){
+	std::list<Adjacent >::iterator it = std::find_if( adjList.begin(), 
+								adjList.end(),	
+   								bind(&adjacent_compare, _1, adj));
+	if ( it != adjList.end() ){
+		return -1;
+	}
+	adjList.push_back(adj);
+	return 0;
+}
+int
+Adl::updateAdjacentStatus(string adjName, int s){
+	Adjacent adj(adjName);
+	
+	std::list<Adjacent >::iterator it = std::find_if( adjList.begin(), 
+								adjList.end(),	
+   								bind(&adjacent_compare, _1, adj));
+
+	if( it == adjList.end()){
+		return -1;
+	}
+
+	(*it).setStatus(s);
+	return 0;
+	
+
+}
+
+int 
+Adl::updateAdjacentLinkCost(string adjName, double lc){
+	Adjacent adj(adjName);
+	
+	std::list<Adjacent >::iterator it = std::find_if( adjList.begin(), 
+								adjList.end(),	
+   								bind(&adjacent_compare, _1, adj));
+
+	if( it == adjList.end()){
+		return -1;
+	}
+
+	(*it).setLinkCost(lc);
+	return 0;
+
+}
+
+std::list<Adjacent> 
+Adl::getAdjList(){
+	return adjList;
+}
+
+// used for debugging purpose
+void
+Adl::printAdl(){
+	for( std::list<Adjacent>::iterator it=adjList.begin(); it!= adjList.end() ; it++){
+		cout<< (*it) <<endl;
+	}
+}