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
1891 Maximum Level Sum of a Binary Tree Medium
TreeDepth-First SearchBreadth-First Search
1892 Maximum Linear Stock Score Medium
ArrayHash Table
1893 Maximum Manhattan Distance After K Changes Medium
Hash TableMathString
1894 Maximum Matching of Players With Trainers Medium
ArrayTwo PointersGreedy
1895 Maximum Matrix Sum Medium
ArrayGreedyMatrix
1896 Maximum Multiplication Score Medium
ArrayDynamic Programming
1897 Maximum Nesting Depth of the Parentheses Easy
StringStack
1898 Maximum Nesting Depth of Two Valid Parentheses Strings Medium
StringStack
1899 Maximum Non Negative Product in a Matrix Medium
ArrayDynamic ProgrammingMatrix
1900 Maximum Number of Accepted Invitations Medium
ArrayDepth-First SearchGraph
1901 Maximum Number of Achievable Transfer Requests Hard
ArrayBacktrackingBit Manipulation
1902 Maximum Number of Alloys Medium
ArrayBinary Search
1903 Maximum Number of Balloons Easy
Hash TableStringCounting
1904 Maximum Number of Balls in a Box Easy
Hash TableMathCounting
1905 Maximum Number of Books You Can Take Hard
ArrayDynamic ProgrammingStack
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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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