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Problem Category Points AC % Users
NOIP '04 P3 - Chorus Formation China NOI 10p 32.2% 32
NOIP '04 P4 - Bugs Eating Computation China NOI 15p 5.9% 10
NOIP '07 P1 - Counting Numbers China NOI 3p 50.2% 93
NOIP '07 P2 - Expanding Strings China NOI 5p 15.2% 24
NOIP '07 P3 - Removing Numbers from Matrix China NOI 15p 24.8% 28
NOIP '07 P4 - Core of a Tree Net China NOI 17p 10.4% 5
NOIP '08 P1 - Silly Monkey China NOI 5p 32.7% 44
NOIP '08 P2 - Expression by Matches China NOI 10p 51.5% 28
NOIP '08 P3 - Message Passing China NOI 15p 45.7% 19
NOIP '15 P5 - Substring China NOI 12p 20.3% 29
NOIP '18 Junior P1 - Title Statistics China NOI 3p 61.1% 111
NOIP '18 Junior P2 - The Big Battle China NOI 7p 35.9% 16
NOIP '18 Junior P3 - Shuttle Bus China NOI 12p 14.1% 8
NOIP '18 P1 - Paving Roads China NOI 7p 50.9% 223
NOIP '18 P2 - Currency System China NOI 10p 44.0% 124
NOIP '18 P3 - Constructing Tracks China NOI 17p 18.4% 49
NOIP '18 P4 - Travel China NOI 10p 17.1% 18
NOIP '18 P5 - Grid-filling Game China NOI 20p 13.6% 5
NOIP '18 P6 - Defending the Kingdom China NOI 25p 13.8% 6
NOIP '20 P1 - Drainage System China NOI 10p 12.1% 30
NOIP '20 P2 - String Matching China NOI 12p 12.4% 15
NOIP '20 P3 - Game of Moving Ball China NOI 15p 11.9% 8
NOIP '20 P4 - WeRun China NOI 20p 2.4% 2
NOIP '21 P1 - Saying Numbers China NOI 10p 29.9% 118
NOIP '21 P2 - Sequence China NOI 20p 29.0% 71
NOIP '21 P3 - Variance China NOI 20p 10.7% 49
NOIP '21 P4 - Chess China NOI 20p 19.3% 7
NOIP '22 P1 - Flower Planting China NOI 10p 29.3% 44
NOIP '22 P2 - Meow Meow China NOI 20p 5.4% 9
NOIP '22 P3 - Facility Construction China NOI 17p 18.6% 20
NOIP '22 P4 - Contest China NOI 25p 10.3% 9
NOIP '99 Junior P1 - Cantor Table China NOI 5p 51.1% 23
NOIP '99 P1 - Missile Interception China NOI 12p 42.1% 43
NOIP '99 P2 - Palindrome Numbers China NOI 7p 15.9% 30
NOIP '99 P3 - Traveller's Budget China NOI 12p 9.6% 15
NOIP '99 P4 - Stamp Face Value Design China NOI 12p 12.1% 12
NOI Winter Camp '09 P1 - A Shortest Path Problem China NOI 40p 49.3% 7
NOI Winter Camp '17 P2: Challenge China NOI 25p 0.0% 0
Non-space-separated Uncategorized 10 30.9% 49
Not an Aho-Corasick Problem Uncategorized 20 9.9% 11
ICPC NWERC 2005 A - Unequalled Consumption ICPC 25 6.3% 1
ICPC NWERC 2011 A - Binomial Coefficients ICPC 10 13.0% 26
ICPC NWERC 2011 C - Movie Collection ICPC 10 50.0% 14
ICPC NWERC 2011 F - Pool Construction ICPC 25 45.5% 10
ICPC NWERC 2014 F - Finding Lines ICPC 17 18.4% 4
ICPC NWERC 2015 A - Assigning Workstations ICPC 10 33.8% 19
ICPC NWERC 2015 E - Elementary Math ICPC 15 32.2% 8
OCC '19 B1 - Darcy_Liu Olympiads School 3 15.2% 175
OCC '19 B2 - Cinematic Olympiads School 5 17.0% 80
OCC '19 B3 - Difference Olympiads School 5 22.9% 87