Master DSA Topics - January, 2026

Practice problems across 75+ categories

All Coding Problems

Practice coding problems across all companies and topics 3600 problems | 879 Easy | 1856 Medium | 842 Hard

# Problem Difficulty Topics
1591 Letter Tile Possibilities Medium
Hash TableStringBacktracking
1592 Lexicographical Numbers Medium
Depth-First SearchTrie
1593 Lexicographically Minimum String After Removing Stars Medium
Hash TableStringStack
1594 Lexicographically Smallest Beautiful String Hard
StringGreedy
1595 Lexicographically Smallest Equivalent String Medium
StringUnion Find
1596 Lexicographically Smallest Generated String Hard
StringGreedyString Matching
1597 Lexicographically Smallest Palindrome Easy
Two PointersStringGreedy
1598 Lexicographically Smallest String After a Swap Easy
StringGreedy
1599 Lexicographically Smallest String After Adjacent Removals Hard
StringDynamic Programming
1600 Lexicographically Smallest String After Applying Operations Medium
StringDepth-First SearchBreadth-First Search
1601 Lexicographically Smallest String After Operations With Constraint Medium
StringGreedy
1602 Lexicographically Smallest String After Substring Operation Medium
StringGreedy
1603 LFU Cache Hard
Hash TableLinked ListDesign
1604 License Key Formatting Easy
String
1605 Line Reflection Medium
ArrayHash TableMath
Showing 1591-1605 of 3600
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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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