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
256 Find the Longest Balanced Substring of a Binary String Easy
String
257 Find the Longest Semi-Repetitive Substring Medium
StringSliding Window
258 Find the Longest Substring Containing Vowels in Even Counts Medium
Hash TableStringBit Manipulation
259 Find the Most Common Response Medium
ArrayHash TableString
260 Find the Occurrence of First Almost Equal Substring Hard
StringString Matching
261 Find the Original Typed String I Easy
String
262 Find the Original Typed String II Hard
StringDynamic ProgrammingPrefix Sum
263 Find the Sequence of Strings Appeared on the Screen Medium
StringSimulation
264 Find the Shortest Superstring Hard
ArrayStringDynamic Programming
265 Find the Shortest Superstring II Easy
String
266 Find the String with LCP Hard
ArrayStringDynamic Programming
267 Find the Substring With Maximum Cost Medium
ArrayHash TableString
268 Find Unique Binary String Medium
ArrayHash TableString
269 Find Valid Pair of Adjacent Digits in String Easy
Hash TableStringCounting
270 Find Words Containing Character Easy
ArrayString
Showing 256-270 of 803
1 ... 16 17 18 19 20 ... 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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