String Coding Problems

Learn string processing and pattern matching

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

Master DSA Topics - February, 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
316 Last Substring in Lexicographical Order Hard
Two PointersString
317 Latest Time by Replacing Hidden Digits Easy
StringGreedy
318 Latest Time You Can Obtain After Replacing Characters Easy
StringEnumeration
319 Length of Last Word Easy
String
320 Length of the Longest Alphabetical Continuous Substring Medium
String
321 Length of the Longest Valid Substring Hard
ArrayHash TableString
322 Letter Case Permutation Medium
StringBacktrackingBit Manipulation
323 Letter Combinations of a Phone Number Medium
Hash TableStringBacktracking
324 Letter Tile Possibilities Medium
Hash TableStringBacktracking
325 Lexicographically Minimum String After Removing Stars Medium
Hash TableStringStack
326 Lexicographically Smallest Beautiful String Hard
StringGreedy
327 Lexicographically Smallest Equivalent String Medium
StringUnion Find
328 Lexicographically Smallest Generated String Hard
StringGreedyString Matching
329 Lexicographically Smallest Palindrome Easy
Two PointersStringGreedy
330 Lexicographically Smallest String After a Swap Easy
StringGreedy
Showing 316-330 of 803
1 ... 20 21 22 23 24 ... 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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