diff --git a/codechef.cpp b/codechef.cpp
new file mode 100644
index 0000000..d6418b6
--- /dev/null
+++ b/codechef.cpp
@@ -0,0 +1,35 @@
+#include <iostream>
+#include <cmath>
+using namespace std;
+
+int main() {
+	// your code goes here
+	int t;
+	cin>>t;
+	while(t--)
+	{
+	    int n;
+	    cin>>n;
+	
+	if(n==1)
+	{
+	    cout<<3<<endl;;
+	}
+	else if(n==2)
+	{
+	    cout<<15<<endl;
+	}
+	else
+	{
+	    cout<<3;
+	    for(int i=1;i<=n-2;i++)
+	    {
+	        cout<<0;
+	    }
+	    cout<<3<<endl;
+	}
+	
+	}
+	
+	return 0;
+}