Hash Table Coding Problems

Understand hashing and key-value operations

719
Total Problems
168
Easy
418
Medium
127
Hard
Start Practicing
key → valkey → val

Master DSA Topics - January, 2026

Practice problems across 75+ categories

Hash Table Coding Problems

Practice problems frequently asked at Hash Table 719 problems | 168 Easy | 418 Medium | 127 Hard

# Problem Difficulty Topics
406 Maximum Good Subarray Sum Medium
ArrayHash TablePrefix Sum
407 Maximum Length Substring With Two Occurrences Easy
Hash TableStringSliding Window
408 Maximum Linear Stock Score Medium
ArrayHash Table
409 Maximum Manhattan Distance After K Changes Medium
Hash TableMathString
410 Maximum Number of Balloons Easy
Hash TableStringCounting
411 Maximum Number of Balls in a Box Easy
Hash TableMathCounting
412 Maximum Number of Integers to Choose From a Range I Medium
ArrayHash TableBinary Search
413 Maximum Number of Intersections on the Chart Hard
ArrayHash TableMath
414 Maximum Number of Non-Overlapping Subarrays With Sum Equals Target Medium
ArrayHash TableGreedy
415 Maximum Number of Occurrences of a Substring Medium
Hash TableStringSliding Window
416 Maximum Number of Pairs in Array Easy
ArrayHash TableCounting
417 Maximum Number of Ways to Partition an Array Hard
ArrayHash TableCounting
418 Maximum Number of Words You Can Type Easy
Hash TableString
419 Maximum Palindromes After Operations Medium
ArrayHash TableString
420 Maximum Points Inside the Square Medium
ArrayHash TableString
Showing 406-420 of 719
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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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