
* fix the edge case of the double ended queue pop the last element * refactoring doc --------- Co-authored-by: Jiang15 <weijiang@weijiangs-MacBook-Pro.local>
* fix the edge case of the double ended queue pop the last element * refactoring doc --------- Co-authored-by: Jiang15 <weijiang@weijiangs-MacBook-Pro.local>