Master DSA Topics - February, 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
1965 Employees With Missing Information Easy
Database
1966 Binary Searchable Numbers in an Unsorted Array Medium
ArrayBinary Search
1967 Number of Strings That Appear as Substrings in Word Easy
ArrayString
1968 Array With Elements Not Equal to Average of Neighbors Medium
ArrayGreedySorting
1969 Minimum Non-Zero Product of the Array Elements Medium
MathGreedyRecursion
1970 Last Day Where You Can Still Cross Hard
ArrayBinary SearchDepth-First Search
1971 Find if Path Exists in Graph Easy
Depth-First SearchBreadth-First SearchUnion Find
1972 First and Last Call On the Same Day Hard
Database
1973 Count Nodes Equal to Sum of Descendants Medium
TreeDepth-First SearchBinary Tree
1974 Minimum Time to Type Word Using Special Typewriter Easy
StringGreedy
1975 Maximum Matrix Sum Medium
ArrayGreedyMatrix
1976 Number of Ways to Arrive at Destination Medium
Dynamic ProgrammingGraphTopological Sort
1977 Number of Ways to Separate Numbers Hard
StringDynamic ProgrammingSuffix Array
1978 Employees Whose Manager Left the Company Easy
Database
1979 Find Greatest Common Divisor of Array Easy
ArrayMathNumber Theory
Showing 1966-1980 of 3602
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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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