String Coding Problems

Learn string processing and pattern matching

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

Master DSA Topics - January, 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 Latest Time by Replacing Hidden Digits Easy
StringGreedy
317 Latest Time You Can Obtain After Replacing Characters Easy
StringEnumeration
318 Length of Last Word Easy
String
319 Length of the Longest Alphabetical Continuous Substring Medium
String
320 Length of the Longest Valid Substring Hard
ArrayHash TableString
321 Letter Case Permutation Medium
StringBacktrackingBit Manipulation
322 Letter Combinations of a Phone Number Medium
Hash TableStringBacktracking
323 Letter Tile Possibilities Medium
Hash TableStringBacktracking
324 Lexicographically Minimum String After Removing Stars Medium
Hash TableStringStack
325 Lexicographically Smallest Beautiful String Hard
StringGreedy
326 Lexicographically Smallest Equivalent String Medium
StringUnion Find
327 Lexicographically Smallest Generated String Hard
StringGreedyString Matching
328 Lexicographically Smallest Palindrome Easy
Two PointersStringGreedy
329 Lexicographically Smallest String After a Swap Easy
StringGreedy
330 Lexicographically Smallest String After Adjacent Removals Hard
StringDynamic Programming
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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