• Lumberjack Sequencing
  • The heart flu
  • $ 10 to Win?
  • Financial Management
  • Code Number
  • Cancer or Scorpio
  • Reading a Quadtree
  • Calculating IRR
  • Neverland
  • Area
  • Arithmetic
  • Battleships
  • Binary Calculator
  • Binomial Theorem
  • Brainfuck
  • Checkers
  • Coming Home
  • Dice
  • Divisor Game
  • DNA
  • DNA II
  • Emigration
  • Equation
  • Extra Spaces
  • Galactic Bonding
  • Hic-Hac-Hoe
  • In The Airport
  • LAMAbpo
  • Lucky Numbers
  • Polygon
  • Round Trip
  • Sierpinski Carpet
  • Switch The Lights
  • Tele-loto
  • Time Deposit
  • Story of Tomisu Ghost
  • Fukushima Nuclear Blast
  • Hamming Base
  • Mad Scientist
  • Corrupted Friendship
  • Fantasy Cricket
  • Weird Advertisement
  • A Change in Thermal Unit
  • Prime Independence
  • Save from Radiation
  • Almost Union-Find
  • Broken Keyboard (a.k.a. Beiju Text)
  • Cake Cutting
  • “Dynamic” Inversion
  • Easy Problem from Rujia Liu?
  • Fast Matrix Operations
  • Girls’ Celebration
  • Happy Painting!
  • I Can Guess the Data Structure! There is a bag-like data structure, supporting two operations:
  • Jewel Magic
  • K Smallest Sums
  • Rujia Liu Loves Wario Land!
  • Unlock
  • K-Transformed Permutations
  • UVa Panel Discussion
  • Happy Birthday
  • Array Transformer
  • Bubble Sort
  • Find Solutions Look at the following equation:
  • Paint Brush
  • Chess board Coloring
  • Emotional Bishop
  • Avaricious Maryanna
  • Boring Homework
  • Complete the Set
  • Detection of Extraterrestrial
  • Entertainment
  • Fudan Extracurricular Lives
  • Google is Feeling Lucky
  • Herbicide
  • Imitation
  • Juice Extractor
  • Doom’s Day Algorithm
  • The Election Day
  • Universal Elections (or “he did it again!”)
  • Ordering T-shirts
  • Escher and Tessellations
  • Hats
  • Wrong Keys
  • Radars
  • Very Big Perfect Squares
  • A Gift from the Setter
  • Flying Spaceships
  • Help the Winners
  • Sum of Four Squares
  • The Monkey and the Oiled Bamboo
  • Game of CS
  • Race
  • War Map
  • Stable Grid
  • Musical Chair
  • Batting Practice
  • Goldbach’s Cardinality
  • Again Lucky Numbers
  • BFS (Binary Fibonacci String)
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