exit function has been added

@@ -4,9 +4,10 @@ using namespace std;
 
 
 int main() {
 int main() {
 	string input;
 	string input;
-	while (true) {
-		getline(cin, input);
+	getline(cin, input);
+	while (input != "exit") {
 		cout << input << endl;
 		cout << input << endl;
+		getline(cin, input);
 	}
 	}
 	return 0;
 	return 0;
 }
 }
\ No newline at end of file