03 - String7 - Reverse Integer →8 - String To Integer (Atoi) →12 - Integer To Roman →151 - Reverse Words In A String →344 - Reverse String →451 - Sort Characters By Frequency →459 - Repeated Substring Pattern →524 - Longest Word In Dictionary Through Deleting →541 - Reverse String II →567 - Permutation In String →Microsoft - URLify A Given String →