adding cs142 code

cs142/lab03/quick.cpp

@@ -0,0 +1,16 @@
+#include <iostream>
+#include <string>
+
+using namespace std;
+
+int main () {
+
+    string a, b;
+    cin >> a;
+    cin >> b;
+
+    if(a<b)
+        cout << "first is before last" << endl;
+    else
+        cout << "Second is before first" << endl;
+}