Add Permutations.cpp
Add Permutations2.cpp
Add WildcardMatching.cpp
Add MultiplyStrings.cpp
Add SearchInsertPosition.cpp
Add SearchForARange.cpp
Add LongestValidParentheses.cpp
Add a min version.
add NextPermutation.cpp
Add SubstringWithConcatenationOfAllWords.cpp
Add RemoveElement.cpp
Add ReverseNodesInK-Group.cpp
Add SwapNodesInPairs.cpp
Add MergeKSortedLists.cpp
Add ValidParentheses.cpp
Add RemoveNthNodeFromEndOfList.cpp
Add LetterCombinationsOfAPhoneNumber.cpp
Add RomanToInteger.cpp
Add IntegerToRoman.cpp
Add StringToInteger.cpp