Blitz80 ⚡ – The Ultimate Readiness Test

Blitz80 is your final readiness checkpoint before stepping into high‑stakes interviews. 80 curated problems covering every critical topic to uncover hidden gaps in your preparation and deliver instant feedback to close them.

Core DSA

  • Arrays & Strings
  • Searching & Sorting
  • Hashing
  • Stacks & Queues
  • Bit Manipulation

Advanced

  • Linked Lists
  • Recursion & Backtracking
  • Dynamic Programming
  • Graphs
  • Heaps & Priority Queues

Specialized

  • Binary Trees & BST
  • Maps & Sets
  • Math & Geometry

Getting Stuck Somewhere?
✨ Genie puts your preparation to the test under real placement conditions, helping you spot blind spots and build the confidence to walk into interviews fully prepared.

Arrays ( ⌛️ Incoming new problems )

Lens StackingProblem
Difficulty: EasySubmissions: 1701
Afraid of the DarkProblem
Difficulty: EasySubmissions: 42
Watering PotsProblem
Difficulty: EasySubmissions: 27
Spiral Traversal MatrixProblem
Difficulty: MediumSubmissions: 7

Searching ( ⌛️ Incoming new problems )

Find Peak IndexProblem
Difficulty: MediumSubmissions: 33
Array DivisionProblem
Difficulty: MediumSubmissions: 42
Square Root of a NumberProblem
Difficulty: EasySubmissions: 21

Hashing ( ⌛️ Incoming new problems )

2 SumProblem
Difficulty: EasySubmissions: 1
Defence TowersProblem
Difficulty: MediumSubmissions: 18

Recursion ( ⌛️ Incoming new problems )

The Big PowersProblem
Difficulty: EasySubmissions: 21
Permutations of the StringProblem
Difficulty: HardSubmissions: 21
Tower of HanoiProblem
Difficulty: HardSubmissions: 14
Nokia MessagingProblem
Difficulty: EasySubmissions: 26

DP ( ⌛️ Incoming new problems )

Equal PartitionProblem
Difficulty: MediumSubmissions: 20
Subset Sum Equals to NProblem
Difficulty: MediumSubmissions: 11
0-1 HoleProblem
Difficulty: MediumSubmissions: 14
LCS ReconstructionProblem
Difficulty: MediumSubmissions: 21
Rahul and Bike FactoriesProblem
Difficulty: MediumSubmissions: 15
Remove ElementsProblem
Difficulty: HardSubmissions: 11
Fractional LootProblem
Difficulty: EasySubmissions: 10

Graphs ( ⌛️ Incoming new problems )

Most Profitable TeamProblem
Difficulty: EasySubmissions: 13
Prison EscapeProblem
Difficulty: MediumSubmissions: 11
Farthest NodeProblem
Difficulty: MediumSubmissions: 5
Pirate's Night RideProblem
Difficulty: MediumSubmissions: 10
Flight DiscountProblem
Difficulty: MediumSubmissions: 9
Alien DictionaryProblem
Difficulty: HardSubmissions: 12
Connected TownProblem
Difficulty: MediumSubmissions: 4
Endless RoadProblem
Difficulty: MediumSubmissions: 8

Binary Search Tree ( ⌛️ Incoming new problems )

Lowest Common Ancestor in a BSTProblem
Difficulty: MediumSubmissions: 14

Linked List ( ⌛️ Incoming new problems )

Frog FreddyProblem
Difficulty: MediumSubmissions: 15

Maps & Sets ( ⌛️ Incoming new problems )

DatabaseProblem
Difficulty: MediumSubmissions: 10