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Problem Category Types Points AC % Users
NOI '97 P6 - Satellite Coverage China NOI Data Structures 12p 37.6% 27
NOI '98 P1 - Personal Income Tax China NOI Implementation 7 54.5% 21
NOI '98 P2 - Free Pizza China NOI Uncategorized 15p 18.8% 13
NOI '98 P3 - Software Installation Disk China NOI Graph Theory 15p 43.8% 3
NOI '98 P4 - Scarf Cutting China NOI Dynamic Programming 15p 26.0% 9
NOI '98 P5 - SERNET Simulation China NOI Graph Theory 12p 8.5% 14
NOI '98 P6 - Parallel Computing China NOI Uncategorized 25p 0.0% 0
NOI '99 P1 - 01 Sequence China NOI Uncategorized 20p 26.7% 13
NOI '99 P2 - Nails and Ball China NOI Dynamic Programming 15p 20.5% 16
NOI '99 P3 - Birthday Cake China NOI Uncategorized 20p 12.7% 6
NOI '99 P4 - Chessboard Division China NOI Uncategorized 15p 18.6% 15
NOI '99 P5 - Optimally Connected Subset China NOI Uncategorized 15p 72.0% 18
NOI '99 P6 - Memory Allocation China NOI Uncategorized 20p 5.8% 8
NOI '22 Multi-Provincial Team Selection P1 - Preprocessor China NOI Recursion, Regular Expressions 10p 8.2% 12
NOI '22 Multi-Provincial Team Selection P2 - Tree China NOI Simple Math 25p 11.1% 6
NOI '22 Multi-Provincial Team Selection P3 - Community China NOI Graph Theory 40p 2.9% 1
NOI '22 Multi-Provincial Team Selection P4 - Card China NOI Simple Math 25p 12.9% 5
NOI '22 Multi-Provincial Team Selection P5 - Bracket China NOI Ad Hoc 35p 6.8% 6
NOI '22 Multi-Provincial Team Selection P6 - MIS China NOI Dynamic Programming 40p 8.3% 2
NOIP '04 P2 - Combine Fruit China NOI Greedy Algorithms 5 32.3% 51
NOIP '04 P3 - Chorus Formation China NOI Uncategorized 10p 31.5% 29
NOIP '04 P4 - Bugs Eating Computation China NOI Uncategorized 15p 5.9% 10
NOIP '07 P1 - Counting Numbers China NOI Ad Hoc 3p 46.8% 66
NOIP '07 P2 - Expanding Strings China NOI Implementation, String Algorithms 5p 14.7% 23
NOIP '07 P3 - Removing Numbers from Matrix China NOI Dynamic Programming 15p 22.1% 25
NOIP '07 P4 - Core of a Tree Net China NOI Uncategorized 17p 11.3% 4
NOIP '08 P1 - Silly Monkey China NOI Implementation, Simple Math 5p 30.4% 37
NOIP '08 P2 - Expression by Matches China NOI Ad Hoc, Brute Force, Recursion 10p 50.0% 26
NOIP '08 P3 - Message Passing China NOI Uncategorized 15p 44.4% 18
NOIP '15 P5 - Substring China NOI Dynamic Programming 12p 23.1% 18
NOIP '18 Junior P1 - Title Statistics China NOI Implementation 3p 67.3% 62
NOIP '18 Junior P2 - The Big Battle China NOI Simple Math, Simulation 7p 35.5% 15
NOIP '18 Junior P3 - Shuttle Bus China NOI Dynamic Programming 12p 13.0% 7
NOIP '18 P1 - Paving Roads China NOI Ad Hoc 7p 51.2% 196
NOIP '18 P2 - Currency System China NOI Dynamic Programming 10p 43.0% 117
NOIP '18 P3 - Constructing Tracks China NOI Dynamic Programming, Graph Theory 17p 22.7% 40
NOIP '18 P4 - Travel China NOI Graph Theory 10p 16.9% 17
NOIP '18 P5 - Grid-filling Game China NOI Intermediate Math 20p 15.0% 5
NOIP '18 P6 - Defending the Kingdom China NOI Data Structures, Dynamic Programming 25p 14.0% 6
NOIP '20 P1 - Drainage System China NOI Graph Theory 10p 10.6% 20
NOIP '20 P2 - String Matching China NOI String Algorithms 12p 13.5% 10
NOIP '20 P3 - Game of Moving Ball China NOI Divide and Conquer 15p 12.3% 6
NOIP '20 P4 - WeRun China NOI Simple Math 20p 5.0% 2
NOIP '21 P1 - Saying Numbers China NOI Simple Math 10p 31.1% 112
NOIP '21 P2 - Sequence China NOI Dynamic Programming, Intermediate Math 20p 28.6% 68
NOIP '21 P3 - Variance China NOI Uncategorized 20p 11.9% 46
NOIP '21 P4 - Chess China NOI Graph Theory, Implementation 20p 20.8% 7
NOIP '22 P1 - Flower Planting China NOI Dynamic Programming 10p 29.3% 43
NOIP '22 P2 - Meow Meow China NOI Ad Hoc, Implementation 20p 5.4% 9
NOIP '22 P3 - Facility Construction China NOI Dynamic Programming, Graph Theory 17p 16.7% 16