User HongyiSun

Points breakdown

100 / 100

AC | C++20

NOI '04 P1 - The Depressed Cashier

on March 15, 2026, 7:38 p.m.

20pp

weighted 100% (20pp)

100 / 100

AC | C++20

CCO Preparation Test 1 P3 - K-th Rank Student

on March 15, 2026, 7:16 p.m.

17pp

weighted 95% (16pp)

100 / 100

AC | C++20

DMOPC '19 Contest 6 P4 - Grade 12 Math

on March 17, 2026, 1:07 a.m.

15pp

weighted 90% (14pp)

110 / 110

AC | C++20

Binary Search Tree Test

on March 17, 2026, 1:06 a.m.

15pp

weighted 86% (13pp)

25 / 25

AC | C++20

CCO '10 P3 - Wowow

on March 15, 2026, 2:44 a.m.

15pp

weighted 81% (12pp)

25 / 25

AC | C++20

CCO '11 P2 - Vampire Tunnels

on Feb. 16, 2026, 3:53 p.m.

15pp

weighted 77% (12pp)

25 / 25

AC | C++20

CCO '14 P2 - King Gruff

on Feb. 14, 2026, 2:21 a.m.

15pp

weighted 74% (11pp)

30 / 30

AC | C++20

CCC '06 S5 - Origin of Life

on Jan. 6, 2026, 12:19 a.m.

15pp

weighted 70% (10pp)

100 / 100

AC | C++20

DMOPC '22 Contest 2 P3 - Good Permutations

on March 23, 2026, 2:50 a.m.

12pp

weighted 66% (8.0pp)

15 / 15

AC | C++20

CCC '05 S5 - Pinball Ranking

on March 17, 2026, 1:09 a.m.

12pp

weighted 63% (7.6pp)

Problem	Score
An Animal Contest 1 P1 - Alpaca Shapes	3 / 3
An Animal Contest 2 P0 - Koala Matchmaking	3 / 3
An Animal Contest 2 P4 - Koala Gambling	12 / 12
An Animal Contest 3 P1 - Monkey Shopping	3 / 3
An Animal Contest 3 P2 - Monkey Potato	5 / 5
An Animal Contest 5 P2 - Permutations & Products	5 / 5

Problem	Score
Another Contest 3 Problem 1 - Diverse Arrays	7 / 7
Another Contest 7 Problem 3 - Network Connections	10 / 10

Problem	Score
CCC '00 S1 - Slot Machines	5 / 5
CCC '00 S3 - Surfing	7 / 7
CCC '01 S1 - Keeping Score	5 / 5
CCC '01 S3 - Strategic Bombing	7 / 7
CCC '01 S4 - Cookies	10 / 10
CCC '02 J2 - AmeriCanadian	3 / 3
CCC '02 S1 - The Students' Council Breakfast	5 / 5
CCC '02 S4 - Bridge Crossing	10 / 10
CCC '03 J2 - Picture Perfect	1.200 / 3
CCC '03 S1 - Snakes and Ladders	5 / 5
CCC '03 S2 - Poetry	5 / 5
CCC '03 S3 - Floor Plan	7 / 7
CCC '03 S5 - Trucking Troubles	10 / 10
CCC '04 J2 - Terms of Office	3 / 3
CCC '04 J3 - Smile with Similes	3 / 3
CCC '04 J4 - Simple Encryption	5 / 5
CCC '04 J5 - Fractals	10 / 10
CCC '04 S1 - Fix	5 / 5
CCC '04 S2 - TopYodeller	5 / 5
CCC '04 S3 - Spreadsheet	10 / 10
CCC '04 S5 - Super Plumber	10 / 10
CCC '05 J1 - The Cell Sell	3 / 3
CCC '05 J2 - RSA Numbers	3 / 3
CCC '05 J3 - Returning Home	5 / 5
CCC '05 J4 - Cross Spiral	7 / 7
CCC '05 J5 - Bananas	10 / 10
CCC '05 S1 - Snow Calls	5 / 5
CCC '05 S2 - Mouse Move	5 / 5
CCC '05 S3 - Quantum Operations	10 / 10
CCC '05 S4 - Pyramid Message Scheme	10 / 10
CCC '05 S5 - Pinball Ranking	12 / 12
CCC '06 J1 - Canadian Calorie Counting	3 / 3
CCC '06 J2 - Roll the Dice	3 / 3
CCC '06 J3 - Cell-Phone Messaging	3 / 3
CCC '06 J4 - It's tough being a teen!	7 / 7
CCC '06 S1 - Maternity	3.333 / 5
CCC '06 S2 - Attack of the CipherTexts	2 / 5
CCC '06 S4 - Groups	10 / 10
CCC '06 S5 - Origin of Life	15 / 15
CCC '07 J1 - Who is in the Middle?	3 / 3
CCC '07 J2 - I Speak TXTMSG	3 / 3
CCC '07 J3 - Deal or No Deal Calculator	3 / 3
CCC '07 J4 - Anagram Checker	5 / 5
CCC '07 J5 - Keep on Truckin'	7 / 7
CCC '07 S1 - Federal Voting Age	3 / 3
CCC '07 S2 - Boxes	5 / 5
CCC '07 S3 - Friends	7 / 7
CCC '07 S5 - Bowling for Numbers	10 / 10
CCC '08 J1 - Body Mass Index	3 / 3
CCC '08 J2 - Do the Shuffle	3 / 3
CCC '08 J3 - GPS Text Entry	3 / 3
CCC '08 S1 - It's Cold Here!	3 / 3
CCC '08 S2 - Pennies in the Ring	5 / 5
CCC '08 S3 - Maze	7 / 7
CCC '08 S4 - Twenty-four	10 / 10
CCC '08 S5 - Nukit	10 / 10
CCC '09 J1 - ISBN	3 / 3
CCC '09 J2 - Old Fishin' Hole	5 / 5
CCC '09 J3 - Good Times	5 / 5
CCC '09 J4 - Signage	5 / 5
CCC '09 S1 - Cool Numbers	5 / 5
CCC '09 S2 - Lights Going On and Off	10 / 10
CCC '09 S3 - Degrees Of Separation	10 / 10
CCC '09 S4 - Shop and Ship	10 / 10
CCC '09 S5 - Wireless	12 / 12
CCC '10 J1 - What is n, Daddy?	3 / 3
CCC '10 J2 - Up and Down	5 / 5
CCC '10 J3 - Punchy	5 / 5
CCC '10 J4 - Global Warming	5 / 5
CCC '10 J5 - Knight Hop	7 / 7
CCC '10 S2 - Huffman Encoding	5 / 5
CCC '11 J1 - Which Alien?	3 / 3
CCC '11 J2 - Who Has Seen The Wind	5 / 5
CCC '11 J3 - Sumac Sequences	5 / 5
CCC '11 J4 - Boring Business	7 / 7
CCC '11 J5 - Unfriend	7 / 7
CCC '11 S1 - English or French?	5 / 5
CCC '11 S2 - Multiple Choice	3 / 3
CCC '11 S3 - Alice Through the Looking Glass	10 / 10
CCC '12 J1 - Speed fines are not fine!	3 / 3
CCC '12 J2 - Sounds fishy!	3 / 3
CCC '12 J3 - Icon Scaling	3 / 3
CCC '12 J4 - Big Bang Secrets	3 / 3
CCC '12 S2 - Aromatic Numbers	5 / 5
CCC '12 S3 - Absolutely Acidic	7 / 7
CCC '13 J1 - Next in line	3 / 3
CCC '13 J2 - Rotating letters	3 / 3
CCC '13 J4 - Time on task	5 / 5
CCC '13 S1 - From 1987 to 2013	5 / 5
CCC '13 S2 - Bridge Transport	5 / 5
CCC '13 S3 - Chances of Winning	10 / 10
CCC '13 S4 - Who is Taller?	7 / 7
CCC '14 J1 - Triangle Times	3 / 3
CCC '14 J2 - Vote Count	3 / 3
CCC '14 J3 - Double Dice	3 / 3
CCC '14 S1 - Party Invitation	5 / 5
CCC '14 S2 - Assigning Partners	5 / 5
CCC '14 S3 - The Geneva Confection	7 / 7
CCC '15 J1 - Special Day	3 / 3
CCC '15 J2 - Happy or Sad	3 / 3
CCC '15 J3 - Rövarspråket	5 / 5
CCC '15 J4 - Wait Time	5 / 5
CCC '15 J5 - π-day	10 / 10
CCC '15 S1 - Zero That Out	3 / 3
CCC '15 S2 - Jerseys	5 / 5
CCC '15 S3 - Gates	10 / 10
CCC '16 J1 - Tournament Selection	3 / 3
CCC '16 J2 - Magic Squares	3 / 3
CCC '16 J3 - Hidden Palindrome	5 / 5
CCC '16 J4 - Arrival Time	5 / 5
CCC '16 S2 - Tandem Bicycle	5 / 5
CCC '17 J1 - Quadrant Selection	3 / 3
CCC '17 J2 - Shifty Sum	3 / 3
CCC '17 J3 - Exactly Electrical	3 / 3
CCC '17 J4 - Favourite Times	5 / 5
CCC '17 S2 - High Tide, Low Tide	5 / 5
CCC '17 S3 - Nailed It!	7 / 7
CCC '18 J1 - Telemarketer or not?	3 / 3
CCC '18 J2 - Occupy parking	3 / 3
CCC '18 J3 - Are we there yet?	3 / 3
CCC '18 J5 - Choose your own path	7 / 7
CCC '18 S2 - Sunflowers	5 / 5
CCC '18 S3 - RoboThieves	10 / 10
CCC '19 J1 - Winning Score	3 / 3
CCC '19 J2 - Time to Decompress	3 / 3
CCC '19 J3 - Cold Compress	5 / 5
CCC '19 S1 - Flipper	3 / 3
CCC '19 S2 - Pretty Average Primes	5 / 5
CCC '20 J1 - Dog Treats	3 / 3
CCC '20 J2 - Epidemiology	3 / 3
CCC '20 J3 - Art	3 / 3
CCC '20 J4 - Cyclic Shifts	5 / 5
CCC '20 S2 - Escape Room	10 / 10
CCC '21 J1 - Boiling Water	3 / 3
CCC '21 J2 - Silent Auction	3 / 3
CCC '21 J3 - Secret Instructions	5 / 5
CCC '21 J4 - Arranging Books	7 / 7
CCC '21 S2 - Modern Art	7 / 7
CCC '21 S3 - Lunch Concert	10 / 10
CCC '22 J1 - Cupcake Party	3 / 3
CCC '22 J2 - Fergusonball Ratings	3 / 3
CCC '22 J3 - Harp Tuning	5 / 5
CCC '22 J5 - Square Pool	10 / 10
CCC '22 S3 - Good Samples	10 / 10
CCC '23 J1 - Deliv-e-droid	3 / 3
CCC '23 J2 - Chili Peppers	3 / 3
CCC '23 J3 - Special Event	5 / 5
CCC '23 J5 - CCC Word Hunt	10 / 10
CCC '23 S1 - Trianglane	5 / 5
CCC '23 S3 - Palindromic Poster	10 / 10
CCC '24 J1 - Conveyor Belt Sushi	3 / 3
CCC '24 J2 - Dusa And The Yobis	3 / 3
CCC '24 J3 - Bronze Count	5 / 5
CCC '24 J4 - Troublesome Keys	7 / 7
CCC '24 J5 - Harvest Waterloo	7 / 7
CCC '24 S3 - Swipe	10 / 10
CCC '96 S4 - When in Rome	10 / 10
CCC '96 S5 - Maximum Distance	7 / 7
CCC '97 S1 - Sentences	5 / 5

Problem	Score
CCO '01 P1 - The Monkey Dance	10 / 10
CCO '07 P2 - Snowflakes	10 / 10
CCO '10 P3 - Wowow	15 / 15
CCO '10 P4 - Computer Purchase Return	10 / 10
CCO '11 P2 - Vampire Tunnels	15 / 15
CCO '14 P1 - Troyangles	10 / 10
CCO '14 P2 - King Gruff	15 / 15
CCO '15 P4 - Cars on Ice	10 / 10
CCO '18 P1 - Geese vs. Hawks	10 / 10

Problem	Score
Next Prime	5 / 5
Longest Increasing Subsequence	10 / 10

User HongyiSun

Points breakdown

AAC (31 points)

ACC (17 points)

Baltic OI (12 points)

CCC (889.533 points)

CCO (105 points)

China NOI (20 points)

Classics (15 points)

COCI (207 points)

Data Structure Tests (25 points)

DMOPC (245 points)

DWITE (82 points)

FHC (10 points)

GFSSOC (25 points)

IOI (30 points)

Mock CCC (24 points)

Mock CCO (17 points)

MWC (10 points)

SAC Coding Challenge (22 points)

Seasonal (41 points)

SIUCF (5 points)

TLE (15 points)

TSOC (7 points)

Uncategorized (231 points)

VM7WC (50 points)

Woburn Challenge (11 points)

YAC (12 points)

Problem	Score
COCI '06 Contest 1 #2 Herman	5 / 5
COCI '06 Contest 1 #4 Slikar	10 / 10
COCI '06 Contest 2 #4 Sjecišta	7 / 7
COCI '07 Contest 5 #3 Jabuke	7 / 7
COCI '07 Contest 6 #1 Parking	5 / 5
COCI '07 Contest 6 #2 Semafori	7 / 7
COCI '08 Contest 2 #3 Perket	7 / 7
COCI '08 Contest 3 #1 Pet	5 / 5
COCI '09 Contest 1 #2 Domino	5 / 5
COCI '09 Contest 6 #2 Natjecanje	5 / 5
COCI '10 Contest 3 #5 Diferencija	12 / 12
COCI '12 Contest 4 #2 Esej	5 / 5
COCI '13 Contest 3 #1 Riječi	5 / 5
COCI '13 Contest 4 #2 Gmo	5 / 5
COCI '14 Contest 1 #1 Prosjek	5 / 5
COCI '14 Contest 2 #2 Utrka	5 / 5
COCI '15 Contest 2 #2 Geppetto	7 / 7
COCI '15 Contest 2 #3 Artur	10 / 10
COCI '15 Contest 5 #3 Perica	10 / 10
COCI '15 Contest 5 #4 Poplava	12 / 12
COCI '16 Contest 1 #2 Jetpack	7 / 7
COCI '16 Contest 5 #2 Pareto	5 / 5
COCI '16 Contest 6 #2 Telefoni	5 / 5
COCI '17 Contest 2 #2 ZigZag	5 / 5
COCI '18 Contest 4 #2 Wand	7 / 7
COCI '19 Contest 3 #1 Preokret	5 / 5
COCI '21 Contest 6 #3 Naboj	10 / 10
COCI '06 Regional #1 Bard	7 / 7
COCI '06 Regional #3 Firefly	10 / 10
COCI '07 Regional #1 Platforme	7 / 7

Problem	Score
DMOPC '13 Contest 3 P3 - Crossing Field	7 / 7
DMOPC '14 Contest 1 P3 - New Students	3 / 3
DMOPC '14 Contest 2 P4 - Deforestation	7 / 7
DMOPC '14 Contest 2 P5 - Sawmill Scheme	10 / 10
DMOPC '14 Contest 3 P4 - Not Enough Testers!	10 / 10
DMOPC '14 Contest 3 P6 - Not Enough Time!	10 / 10
DMOPC '14 Contest 4 P6 - Save Nagato!	10 / 10
DMOPC '14 Contest 7 P2 - Tides	5 / 5
DMOPC '15 Contest 1 P2 - Itami and Squad	5 / 5
DMOPC '15 Contest 1 P5 - Lelei and Dragon Scales	10 / 10
DMOPC '15 Contest 4 P2 - The Big Clock	5 / 5
DMOPC '15 Contest 4 P4 - Great Sequence	10 / 10
DMOPC '15 Contest 5 P4 - Steins;Number	12 / 12
DMOPC '16 Contest 4 P1 - Fast Exponents	5 / 5
DMOPC '17 Contest 1 P2 - Sharing Crayons	7 / 7
DMOPC '17 Contest 2 P3 - Bad Bunnies	10 / 10
DMOPC '18 Contest 1 P1 - Sorting	5 / 5
DMOPC '18 Contest 6 P3 - Wish Upon a Star	10 / 10
DMOPC '18 Contest 6 P4 - Tank	10 / 10
DMOPC '19 Contest 3 P1 - Mode Finding	5 / 5
DMOPC '19 Contest 4 P1 - Valid Strings	5 / 5
DMOPC '19 Contest 6 P4 - Grade 12 Math	15 / 15
DMOPC '19 Contest 7 P0 - Contest Feedback	3 / 3
DMOPC '20 Contest 1 P2 - Victor's Moral Dilemma	5 / 5
DMOPC '20 Contest 2 P3 - Roadrollification	10 / 10
DMOPC '20 Contest 4 P3 - Roving Roombas	12 / 12
DMOPC '21 Contest 5 P1 - Permutations & Primes	5 / 5
DMOPC '21 Contest 9 P2 - String Puzzle	7 / 7
DMOPC '22 Contest 2 P3 - Good Permutations	12 / 12
DMPG '17 S2 - Anime Conventions	10 / 10
DMPG '19 S1 - Candy Shop Tycoon	5 / 5

Problem	Score
DWITE '06 R5 #5 - Prime Palindromes	10 / 10
DWITE '07 R1 #5 - Velociraptor Maze	7 / 7
DWITE '07 R2 #3 - Floor Plan	7 / 7
DWITE '07 R2 #4 - All Is Balanced	5 / 5
DWITE '07 R3 #5 - Portals	7 / 7
DWITE '08 R2 #5 - Water damage	7 / 7
DWITE '08 R4 #3 - Secret party	7 / 7
DWITE '09 R1 #2 - Word Scrambler	5 / 5
DWITE '09 R1 #3 - That Missing Number	5 / 5
DWITE '09 R7 #5 - Snapper Chain	10 / 10
DWITE '10 R4 #4 - Mountain Hiking	7 / 7
DWITE '12 R1 #4 - Trick or Tree'ing	5 / 5

Problem	Score
GFSSOC '14 Winter J5 - Pursuit of Knowledge	10 / 10
GFSSOC '15 Fall J5 - Nightmare-a-thon	10 / 10
GFSSOC '15 Fall Practice P3 - Bruno and Beads	5 / 5

Problem	Score
IOI '00 P1 - Palindrome	10 / 10
IOI '04 P4 - Phidias	10 / 10
IOI '09 P4 - Raisins	10 / 10

Problem	Score
Mock CCC '20 Contest 2 S2 - 4D BBST on a DP	5 / 5
Mock CCC '14 S3 - Spreadsheet Sorting	7 / 7
Mock CCC '18 Contest 5 J4/S2 - Reverse Sort	5 / 5
Mock CCC '18 Contest 5 J5/S3 - Directed Graph Connectivity	7 / 7

Problem	Score
SAC '21 Code Challenge P4 - Averaging Averages	5 / 5
SAC '22 Code Challenge 3 P2 - Unicycle License	5 / 5
SAC '22 Code Challenge 5 Junior P3 - Media List	5 / 5
SAC '22 Code Challenge 5 Junior P4 - Course Requirements	7 / 7

Problem	Score
Back From Summer '17 P2: Crayola Lightsaber	7 / 7
Back To School '17: Avalon	5 / 5
Back To School '18: Letter Frequency	7 / 7
Canada Day Contest 2021 - CCC Bad Haha	12 / 12
Miracle Sort	3 / 3
Is it a Tree?	7 / 7

Problem	Score
TLE '16 Contest 4 P1 - Stack of Presents	5 / 5
TLE '16 Contest 6 (Mock CCC) S1 - Writing the CCC	5 / 5
TLE '17 Contest 2 P2 - Unlucky Numbers	5 / 5

Problem	Score
Triple Fat Ladies	5 / 5
Appleby Contest '19 P3 - A Recursion Problem	5 / 5
Arcadia Computing Contest 2 P5 - lp0 is on fire!	10 / 10
A Plus B	3 / 3
Adding Reversed Numbers	5 / 5
The Cake is a Dessert	10 / 10
Checkerboard Summation (Easy)	12 / 12
Chocolate Bar	5 / 5
Educational DP Contest AtCoder A - Frog 1	7 / 7
Educational DP Contest AtCoder G - Longest Path	10 / 10
Educational DP Contest AtCoder K - Stones	10 / 10
Educational DP Contest AtCoder L - Deque	10 / 10
PEG Test '11 - Cyclopian Cash	3 / 3
Troubling Triangles	7 / 7
Graph Contest 2 P2 - Directed Acyclic Graph	10 / 10
HCI '16 - Ulam Spiral	5 / 5
Hello, World!	3 / 3
Word Scrambler	5 / 5
Knapsack 3	10 / 10
A Math Contest P2 - Subsequence Sum	5 / 5
OCC '19 S2 - Rimuru's Number Game	5 / 5
The Mirror	5 / 5
Postfix Notation	7 / 7
Primes	3 / 3
Rat In A Maze	5 / 5
RGPC '17 P4 - Snow Day	10 / 10
Bubble Sort	7 / 7
STNBD P3 - Rinslet Laurenfrost	5 / 5
Sum Maximization	10 / 10
THICC '17 P2 - Molly and Product	7 / 7
Tropical Bananas	10 / 10
UTS Open '21 P2 - Prime Array	10 / 10
Valentine's Day '19 S2 - Ctudor's Cute Cacti	7 / 7

Problem	Score
VMSS '15 #2 - Tomb Robbing	7 / 7
VMSS '15 #4 - Frank and Roads	10 / 10
VM7WC '15 #4 Gold - Chain Rule	10 / 10
VM7WC '15 #5 Bronze - Melanioana	3 / 3
VM7WC '16 #2 Silver - GG	5 / 5
VM7WC '16 #3 Silver - Can Shahir even get there?!	5 / 5
VM7WC '16 #3 Gold - Hello, Officer.	10 / 10

Problem	Score
WC '15 Contest 4 J2 - Mission Briefing	3 / 3
WC '16 Contest 1 J1 - A Spooky Season	3 / 3
WC '16 Finals J2 - Enigmoo	5 / 5

Problem	Score
Yet Another Contest 1 P3 - Fluke	2 / 10
Yet Another Contest 7 P2 - Coprime Grid	10 / 10