• 0014 - Longest Common Prefix
• 0020 - Valid Parentheses
• 0022 - Generate Parentheses
• 0058 - Length of Last Word
• 0072 - Edit Distance
• 0125 - Valid Palindrome
• 0214 - Shortest Palindrome
• 0402 - Remove K Digits
• 0459 - Repeated Substring Pattern
• 0551 - Student Attendance Record I
• 0680 - Valid Palindrome II
• 0763 - Partition Labels
• 0899 - Orderly Queue
• 1221 - Split a String in Balanced Strings
• 1513 - Number of Substrings With Only 1s
• 1578 - Minimum Time to Make Rope Colorful
• 1689 - Partitioning Into Minimum Number Of Deci-Binary Numbers
• 1759 - Count Number of Homogenous Substrings
• 1769 - Minimum Number of Operations to Move All Balls to Each Box
• 1898 - Maximum Number of Removable Characters
• 1927 - Sum Game
• 1935 - Maximum Number of Words You Can Type
• 2053 - Kth Distinct String in an Array
• 2085 - Count Common Words With One Occurrence
• 2125 - Number of Laser Beams in a Bank
• 2185 - Counting Words With a Given Prefix
• 2315 - Count Asterisks
• 2380 - Time Needed to Rearrange a Binary String
• 2696 - Minimum String Length After Removing Substrings
• 2942 - Find Words Containing Character
• 3019 - Number of Changing Keys
• 3407 - Substring Matching Pattern
• 3461 - Check If Digits Are Equal in String After Operations I