diff --git a/Mathematics/CommonSubSeq.cpp b/Dynamic Programming/CommonSubSeq.cpp
similarity index 86%
rename from Mathematics/CommonSubSeq.cpp
rename to Dynamic Programming/CommonSubSeq.cpp
index 437dd8135..0e5ba627f 100644
--- a/Mathematics/CommonSubSeq.cpp
+++ b/Dynamic Programming/CommonSubSeq.cpp	
@@ -1,8 +1,6 @@
 
-/* Implementation of LCS problem using DP*/
-#include<iostream>
-#include<cstring>
-#include<cstdlib>
+/* Implementation of LCS problem using Dynamic Programming*/
+#include <bits/stdc++.h>
 
 using namespace std;
 
@@ -36,11 +34,13 @@ void lcs(string X, string Y){
     else
     j--;
   }
+  //output
   cout << "LCS of " << X << " and " << Y << " is " << lcs;
 }
 
 int main(){
   string a,b;
+  //input two strings
   cin>>a;
   cin>>b;
   lcs(a,b);
diff --git a/Dynamic Programming/Subset-Sum.cpp b/Dynamic Programming/Subset-Sum.cpp
index 12974fb09..1896cd216 100644
--- a/Dynamic Programming/Subset-Sum.cpp	
+++ b/Dynamic Programming/Subset-Sum.cpp	
@@ -3,7 +3,9 @@
 #include <bits/stdc++.h>
 
 using namespace std;
+
 // Returns true if there is a subset of set[] with sun equal to given sum
+
 bool isSubsetSum(int set[], int n, int sum){
   bool subset[n+1][sum+1];
   for (int i = 0; i <= n; i++)
@@ -24,7 +26,7 @@ bool isSubsetSum(int set[], int n, int sum){
 int main()
 {
   int n,sum;
-  //input n - size of set and sum
+  //input n - size of set and sum to which it has to be compared
   cin>>n>>sum;
   int set[n];
   //input elements of set