Your task is to remove the minimum number of parentheses ( ' (' or ')', in any positions ) so that the resulting parentheses string is valid and return any valid string.

The deletion distance between two strings is the minimum sum of ASCII values of characters that you need to delete in the two strings in order to have the same string. The deletion distance between ...

I have previously blogged on how Groovy and ActionScript provide demonstrations of switching on Strings functionality that has not been available in Java. JDK 7 changes this for Java by ...