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
106 Count Number of Homogenous Substrings Medium
MathString
107 Count Number of Texts Medium
Hash TableMathString
108 Count Numbers with Non-Decreasing Digits Unknown
MathStringDynamic Programming
109 Count Odd Letters from Number Easy
Hash TableStringSimulation
110 Count of Integers Hard
MathStringDynamic Programming
111 Count of Substrings Containing Every Vowel and K Consonants I Medium
Hash TableStringSliding Window
112 Count of Substrings Containing Every Vowel and K Consonants II Medium
Hash TableStringSliding Window
113 Count Pairs of Equal Substrings With Minimum Difference Medium
Hash TableStringGreedy
114 Count Pairs Of Similar Strings Easy
ArrayHash TableString
115 Count Palindromic Subsequences Hard
StringDynamic Programming
116 Count Prefix and Suffix Pairs I Easy
ArrayStringTrie
117 Count Prefix and Suffix Pairs II Hard
ArrayStringTrie
118 Count Prefixes of a Given String Easy
ArrayString
119 Count Stepping Numbers in Range Hard
StringDynamic Programming
120 Count Strings With Required Characters Easy
ArrayHash TableString
Showing 106-120 of 803
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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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