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Problems

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Difficulty
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529
Inspection
Very hard
530
Java Certification
Very hard
531
K-equivalence
Easy
532
Series / Parallel Resistor Circuits
Hard
533
The Heart of the Country
Hard
534
Lawrence of Arabia
Medium
535
Shoring Up the Levees
536
Combination Lock
537
Fred’s Lotto Tickets
538
A No-Win Situation
Medium
539
A Walk in the Park
540
Teleport Out!
Hard
541
Worms
Medium
542
Soda Surplier
543
Money Matters
Very easy
544
Allergy Test
Very easy
545
Rain Fall
Very easy
546
Speedy Escape
Medium
547
Gokigen Naname
548
Flight Planning
Very easy
549
Beacons
Very easy
550
Playfair Cipher
551
Code Permutations
552
Numerical sequence
Easy
553
Recursion
Very easy
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