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
511 Number of Changing Keys Easy
String
512 Number of Days Between Two Dates Easy
MathString
513 Number of Different Integers in a String Easy
Hash TableString
514 Number of Distinct Binary Strings After Applying Operations Medium
MathString
515 Number of Distinct Substrings in a String Unknown
StringTrieRolling Hash
516 Number of Divisible Substrings Medium
Hash TableStringCounting
517 Number of Equal Count Substrings Medium
Hash TableStringSliding Window
518 Number of Good Ways to Split a String Medium
Hash TableStringDynamic Programming
519 Number of Laser Beams in a Bank Medium
ArrayMathString
520 Number of Lines To Write String Easy
ArrayString
521 Number of Matching Subsequences Medium
ArrayHash TableString
522 Number of Pairs of Strings With Concatenation Equal to Target Medium
ArrayHash TableString
523 Number of Same-End Substrings Medium
ArrayHash TableString
524 Number of Segments in a String Easy
String
525 Number of Senior Citizens Easy
ArrayString
Showing 511-525 of 803
1 ... 33 34 35 36 37 ... 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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