/core_solution3/
drwxr-xr-x [up]
-rw-r--r-- 2022-11-02 21:49 +0000 6170 postfix.jar
-rw-r--r-- 2022-11-02 21:49 +0000 3589 postfix.scala
-rw-r--r-- 2022-11-02 21:49 +0000 9847 postfix2.jar
-rw-r--r-- 2022-11-02 21:49 +0000 3072 postfix2.scala