Array Coding Problems

Master array manipulation and traversal techniques

1947
Total Problems
398
Easy
1049
Medium
497
Hard
Start Practicing
0123

Master DSA Topics - January, 2026

Practice problems across 75+ categories

Array Coding Problems

Practice problems frequently asked at Array 1947 problems | 398 Easy | 1049 Medium | 497 Hard

# Problem Difficulty Topics
181 Concatenated Words Hard
ArrayStringDynamic Programming
182 Concatenation of Array Easy
ArraySimulation
183 Constrained Subsequence Sum Hard
ArrayDynamic ProgrammingQueue
184 Construct 2D Grid Matching Graph Layout Hard
ArrayHash TableGraph
185 Construct Binary Search Tree from Preorder Traversal Medium
ArrayStackTree
186 Construct Binary Tree from Inorder and Postorder Traversal Medium
ArrayHash TableDivide and Conquer
187 Construct Binary Tree from Preorder and Inorder Traversal Medium
ArrayHash TableDivide and Conquer
188 Construct Binary Tree from Preorder and Postorder Traversal Medium
ArrayHash TableDivide and Conquer
189 Construct Product Matrix Medium
ArrayMatrixPrefix Sum
190 Construct Quad Tree Medium
ArrayDivide and ConquerTree
191 Construct String with Minimum Cost Hard
ArrayStringDynamic Programming
192 Construct Target Array With Multiple Sums Hard
ArrayHeap (Priority Queue)
193 Construct the Lexicographically Largest Valid Sequence Medium
ArrayBacktracking
194 Construct the Minimum Bitwise Array I Easy
ArrayBit Manipulation
195 Construct the Minimum Bitwise Array II Medium
ArrayBit Manipulation
Showing 181-195 of 1947
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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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