diff --git a/day13/C++/day13a.cpp b/day13/C++/day13a.cpp
new file mode 100644
index 00000000..ad7fab15
--- /dev/null
+++ b/day13/C++/day13a.cpp
@@ -0,0 +1,21 @@
+/*
+* @author : dhruv-gupta14
+* @date : 8/01/2019
+*/
+
+#include <bits/stdc++.h>
+using namespace std;
+
+long long calc_fact(long long n)
+{
+    if (n <= 1)
+        return 1;
+    return n*calc_fact(n-1);
+}
+int main()
+{
+    long long n;
+    cin>>n;
+    cout<<calc_fact(n)<<endl;
+    return 0;
+}
diff --git a/day13/C++/day13b.cpp b/day13/C++/day13b.cpp
new file mode 100644
index 00000000..9220bf6f
--- /dev/null
+++ b/day13/C++/day13b.cpp
@@ -0,0 +1,21 @@
+/*
+* @author : dhruv-gupta14
+* @date : 8/01/2019
+*/
+
+#include <bits/stdc++.h>
+using namespace std;
+
+long long fib_num(long long n)
+{
+    if (n <= 2)
+        return 1;
+    return fib_num(n-1)+fib_num(n-2);
+}
+int main()
+{
+    long long n;
+    cin>>n;
+    cout<<fib_num(n)<<endl;
+    return 0;
+}