diff --git a/sources/hash_map.cc b/sources/hash_map.cc
index f6b66b2..c2c4c98 100644
--- a/sources/hash_map.cc
+++ b/sources/hash_map.cc
@@ -10,7 +10,7 @@
 #include <map>
 #include <list>
 #include <ext/hash_map>
-
+#include<bits/stdc++.h>
 /*
  * n: number
  * i: LSB starting from 1
@@ -31,34 +31,36 @@ using namespace std;
 
 int test = 0, pass = 0;
 
-void assert(bool result) {
+int checks(bool result) {
     test++; pass+=result;
-    cout << (result ? "PASS: " : "FAIL: ");
+    cout << (result ? "PASS " : "FAIL ")<<"\n";
+
+    return 0;
 }
 
 
 int main() {
     ios::sync_with_stdio(false);
 
-    __gnu_cxx::hash_map<string, int> months;
-  
-    months["january"] = 31;
-    months["february"] = 28;
-    months["march"] = 31;
-    months["april"] = 30;
-    months["may"] = 31;
-    months["june"] = 30;
-    months["july"] = 31;
-    months["august"] = 31;
-    months["september"] = 30;
-    months["october"] = 31;
-    months["november"] = 30;
-    months["december"] = 31;
+    map<string, int> months;
 
-    ASSERT(months["september"]==30)
-    ASSERT(months["august"]==31)
+    months["January"] = 31;
+    months["February"] = 28;
+    months["March"] = 31;
+    months["April"] = 30;
+    months["May"] = 31;
+    months["June"] = 30;
+    months["July"] = 31;
+    months["August"] = 31;
+    months["September"] = 30;
+    months["October"] = 31;
+    months["November"] = 30;
+    months["December"] = 31;
+
+    checks(months["September"]==30);
+    checks(months["August"]==31);
 
     cout << "Passed: " << pass << " (" << 100.0*pass/test << "%%)" << endl;
 
     return 0;
-}
\ No newline at end of file
+}
diff --git a/sources/hash_map.exe b/sources/hash_map.exe
new file mode 100644
index 0000000..7bc7c94
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diff --git a/sources/hash_map.o b/sources/hash_map.o
new file mode 100644
index 0000000..879055a
Binary files /dev/null and b/sources/hash_map.o differ
diff --git a/sources/list.cc b/sources/list.cc
index e8e6cac..1bf0ec7 100644
--- a/sources/list.cc
+++ b/sources/list.cc
@@ -5,14 +5,15 @@ using namespace std;
 
 int main() {
     list<int> ll;
-    ll.push_back(1);
-    ll.push_back(2);
-    ll.push_back(3);
-    ll.push_back(4);
+    int n;
+    cin>>n;
+    for(int i=1;i<n;i++)
+        ll.push_back(i);
 
+        cout<<"Resulting list is as follows : \n";
     for (list<int>::iterator li = ll.begin(); li != ll.end(); li++) {
         cout << *li << endl;
     }
 
     return 0;
-}
\ No newline at end of file
+}
diff --git a/sources/list.exe b/sources/list.exe
new file mode 100644
index 0000000..3f33183
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diff --git a/sources/list.o b/sources/list.o
new file mode 100644
index 0000000..710ce5a
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