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
3166 Smallest Palindromic Rearrangement II Hard
Hash TableMathString
3167 Smallest Range Covering Elements from K Lists Hard
ArrayHash TableGreedy
3168 Smallest Range I Easy
ArrayMath
3169 Smallest Range II Medium
ArrayMathGreedy
3170 Smallest Rectangle Enclosing Black Pixels Hard
ArrayBinary SearchDepth-First Search
3171 Smallest Rotation with Highest Score Hard
ArrayPrefix Sum
3172 Smallest String Starting From Leaf Medium
StringBacktrackingTree
3173 Smallest String With A Given Numeric Value Medium
StringGreedy
3174 Smallest String With Swaps Medium
ArrayHash TableString
3175 Smallest Subarray to Sort in Every Sliding Window Medium
ArrayTwo PointersStack
3176 Smallest Subarrays With Maximum Bitwise OR Medium
ArrayBinary SearchBit Manipulation
3177 Smallest Subsequence of Distinct Characters Medium
StringStackGreedy
3178 Smallest Substring With Identical Characters I Hard
ArrayBinary SearchEnumeration
3179 Smallest Substring With Identical Characters II Hard
StringBinary Search
3180 Smallest Subtree with all the Deepest Nodes Medium
Hash TableTreeDepth-First Search
Showing 3166-3180 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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