FE Prep

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Start Here – FE Crash Course

100 handpicked problems in the right study order

Summer 2026 Exam

Practice the most recent exam with 12 questions

How to Pass the FE?

I lowkey suggest you read that before practicing :)

#	Title	Difficulty	Exam
421	Super Mario Galaxy Odd Star Log	Med.	Summer 2026
422	Hogwarts House Points Tally	Easy	Summer 2026
423	Wraparound Ring Buffer Landing Spots	Insane	Summer 2026
424	Update Subtree Sizes in a Binary Tree	Easy	Summer 2026
425	Recursive Percolate Up	Hard	Summer 2026
426	Delete It Twice Without Crashing	Hard	Summer 2026
427	Pairwise Minimum Pyramid	Hard	Summer 2026
428	Sixteenfold Exponential Runtime	Med.	Summer 2026
429	From Cubic Terms to a Quartic Polynomial	Med.	Summer 2026
430	Recursive Counting Triangle	Med.	Summer 2026
431	Counting and Maximizing Insertion Sort Swaps	Med.	Summer 2026
432	Powers of Two Decomposition	Hard	Summer 2026
409	Mario Kart Driver Item Collection	Hard	Spring 2026
410	Swap Pairs to Tail Recursively	Hard	Spring 2026
411	Infix to Postfix Evaluation 11	Med.	Spring 2026
412	BST Mystery Print Order	Easy	Spring 2026
413	Base 27 String Hash Function	Hard	Spring 2026
414	AVL Deletion With Double Rotation	Easy	Spring 2026
415	Binary Split With Linear Loop	Hard	Spring 2026
419	Big O to Days Runtime Estimate	Med.	Spring 2026
420	Solve Recurrence 3T(n-1) + 3n	Hard	Spring 2026
418	Recursive Chocolate Bar Slicer	Hard	Spring 2026
417	Recursive Bubble Sort	Hard	Spring 2026
416	Binary to Base 16	Med.	Spring 2026
397	Merge Two Bank Accounts	Med.	Fall 2025