diff --git a/build/CMakeFiles/HLlib.dir/src/HiddenLines.cpp.o b/build/CMakeFiles/HLlib.dir/src/HiddenLines.cpp.o
index 6e6a2df..c0f1662 100644
Binary files a/build/CMakeFiles/HLlib.dir/src/HiddenLines.cpp.o and b/build/CMakeFiles/HLlib.dir/src/HiddenLines.cpp.o differ
diff --git a/build/CMakeFiles/main.dir/src/main.cpp.o b/build/CMakeFiles/main.dir/src/main.cpp.o
index b05c52c..40da628 100644
Binary files a/build/CMakeFiles/main.dir/src/main.cpp.o and b/build/CMakeFiles/main.dir/src/main.cpp.o differ
diff --git a/build/libHLlib.a b/build/libHLlib.a
index f0257c0..a292790 100644
Binary files a/build/libHLlib.a and b/build/libHLlib.a differ
diff --git a/build/main b/build/main
index f797fad..c367524 100755
Binary files a/build/main and b/build/main differ
diff --git a/src/HiddenLines.cpp b/src/HiddenLines.cpp
index 40d7ab5..233fdbb 100644
--- a/src/HiddenLines.cpp
+++ b/src/HiddenLines.cpp
@@ -26,7 +26,7 @@ void HL::print_sol()
 }
 
 //Divide and Conquer Strategy using recursive call to divide ls and merge using merge()
-std::set<Line> HL::gen_sol(std::set<Line>& ls){
+std::set<Line> HL::gen_sol(const std::set<Line>& ls){
 	HL inst = *this;
 	if (ls.size() > 2){
 
@@ -129,6 +129,14 @@ std::set<Line> HL::construct_HWprob(){
     	lines.insert(newline);
     }
 
+
+	std::cout << "Sorted Lines by slope:" << std::endl;
+	for(Line line : lines)
+	{
+		std::cout << "Line " << line.get_id() << " has slope " << line.get_slope() 
+			<< " and a y-intercept of " << line.get_ycept() << std::endl;
+	}
+
 	return lines;
 }
 
diff --git a/src/HiddenLines.h b/src/HiddenLines.h
index bf72af8..9de6458 100644
--- a/src/HiddenLines.h
+++ b/src/HiddenLines.h
@@ -10,7 +10,7 @@ class HL
 		HL();
 
 		void print_sol();
-		std::set<Line> gen_sol(std::set<Line>& ls);
+		std::set<Line> gen_sol(const std::set<Line>& ls);
 		std::set<Line> construct_HWprob();
 		
 		std::set<Line> get_lines() const;
diff --git a/src/main.cpp b/src/main.cpp
index 4bc7928..b17a837 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -12,17 +12,9 @@ int main(int argc, char *argv[])
 	std::cout << "Constructing Problem..." << std::endl;
 	HL inst = HL();
 
-	std::set<Line> lines = inst.get_lines();
-
-	std::cout << "Sorted Lines by slope:" << std::endl;
-	for(Line line : lines)
-	{
-		std::cout << "Line " << line.get_id() << " has slope " << line.get_slope() 
-			<< " and a y-intercept of " << line.get_ycept() << std::endl;
-	}
-
 	std::cout << "Generating Solution." << std::endl;
-	inst.gen_sol(lines);
+	inst.gen_sol(inst.get_lines());
+	
 	std::cout << "Solution is: " << std::endl;
 	inst.print_sol();
 }