String Coding Problems

Learn string processing and pattern matching

803
Total Problems
228
Easy
390
Medium
177
Hard
Start Practicing
"Hello"

Master DSA Topics - April, 2026

Practice problems across 75+ categories

String Coding Problems

Practice problems frequently asked at String 803 problems | 228 Easy | 390 Medium | 177 Hard

# Problem Difficulty Topics
331 Largest Substring Between Two Equal Characters Easy
Hash TableString
332 Largest Time for Given Digits Medium
ArrayStringBacktracking
333 Last Substring in Lexicographical Order Hard
Two PointersString
334 Latest Time by Replacing Hidden Digits Easy
StringGreedy
335 Latest Time You Can Obtain After Replacing Characters Easy
StringEnumeration
336 Length of Last Word Easy
String
337 Length of the Longest Alphabetical Continuous Substring Medium
String
338 Length of the Longest Valid Substring Hard
ArrayHash TableString
339 Letter Case Permutation Medium
StringBacktrackingBit Manipulation
340 Letter Combinations of a Phone Number Medium
Hash TableStringBacktracking
341 Letter Tile Possibilities Medium
Hash TableStringBacktracking
342 Lexer Builder Hard
CompilerStringState Machine
343 Lexicographically Minimum String After Removing Stars Medium
Hash TableStringStack
344 Lexicographically Smallest Beautiful String Hard
StringGreedy
345 Lexicographically Smallest Equivalent String Medium
StringUnion Find
Showing 331-345 of 803
1 ... 21 22 23 24 25 ... 54

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public class MyFirstJavaProgram { Edit & Run

   /* This is my first java program.
    * This will print 'Hello, World!' as the output
    */

   public static void main(String []args) {
      System.out.println("Hello, World!"); // prints
   }
}

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