• Complex, difficult and complicated
  • Fast and Easy Data Compressor
  • Searching for Nessy
  • My T-shirt suits me
  • Numbers and operations
  • The Scrooge Co Problem
  • Automatic correction of misspellings
  • Basic wall maze
  • Construct the wall maze
  • Dihedral groups
  • Economic phone calls
  • Flavius Josephus Reloaded
  • Wine trading in Gergovia
  • Homogeneous squares
  • Formula 1
  • Exact Sum
  • Encoding
  • Maximum Product
  • Beverages
  • Playing War
  • Andy’s Second Dictionary
  • B2-Sequence
  • Number Theory
  • A Gentlemen’s Agreement
  • Aragorn
  • Little Red Riding Hood
  • An Easy Task
  • A Graph Problem
  • The good old times
  • Permutation Representation
  • Points
  • Euler’s Totient Function
  • Draw Grid
  • Collage
  • Add Again
  • Find the Permutations
  • Open Credit System
  • What’s the Time?
  • Place the Guards
  • Strings
  • Matrix Decompressing
  • Zeroes Revisited
  • Anagram Division
  • Back to the 8-Queens
  • Composite Prime
  • Divisibility Testing
  • End up with More Teams
  • Fi-binary Number
  • Going in Cycle!!
  • How many Knight Placing?
  • IIUC HexWorld
  • Just Finish it up
  • Continents
  • Tabriz City
  • Nails
  • Poor My Problem! :-(
  • Battle II
  • Next Same-Factored
  • The Trip, 2007
  • Mall Mania
  • Moonshine
  • WFF ’N PROOF
  • Cousins
  • Semi-prime H-numbers
  • Rectilinear polygon
  • Life Forms
  • Tautology
  • Rinse
  • Equidivisions
  • Generalized Matrioshkas
  • Babylonian Roulette
  • Continuous Fractions A simple continuous fraction has the form:
  • Polygon Encoder
  • Uncle Jack
  • Babel Towers
  • Little Quilt
  • Prisoners, Boxes and Pieces of Paper
  • Chemical Attraction
  • Very Funny, Mr. Feynman!
  • Base -2
  • TriTri
  • Counting Trapezoid
  • Troubles for Modern Days Problemsetters
  • Arrange Some Marbles
  • Relaxed Golf
  • Triple-Free Binary Strings
  • Faulty Computer
  • An antiarithmetic permutation
  • Billiard bounces
  • Close Relatives
  • Dice from pennies
  • Eigensequence
  • Fabled Rooks
  • Gopher that walks and swims
  • Hoax or what
  • Ingenuous Cubrency
  • Nuts and Bolts
  • Counting Quadrilaterals
  • Little Ali’s Little Brother!
  • Sugar Cubes
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