User Oson

Points breakdown

15 / 15

AC | C++20

CCC '16 S5 - Circle of Life

on Oct. 20, 2025, 10:47 p.m.

20pp

weighted 100% (20pp)

15 / 15

AC | C++20

CCC '13 S5 - Factor Solitaire

on Nov. 28, 2025, 10:48 p.m.

15pp

weighted 95% (14pp)

100 / 100

AC | C++20

Primes 2

on Nov. 6, 2025, 9:48 p.m.

15pp

weighted 90% (14pp)

100 / 100

AC | C++20

2048

on Sept. 22, 2025, 9:22 p.m.

15pp

weighted 86% (13pp)

20 / 20

AC | JAVA

CCC '10 S3 - Firehose

on May 19, 2025, 7:57 p.m.

15pp

weighted 81% (12pp)

100 / 100

AC | C++20

An Animal Contest 1 P5 - Odd Alpacas

on Dec. 3, 2025, 11:35 p.m.

12pp

weighted 77% (9.3pp)

100 / 100

AC | C++20

An Animal Contest 2 P3 - Koala Balloons

on Nov. 28, 2025, 10:00 p.m.

12pp

weighted 74% (8.8pp)

100 / 100

AC | C++20

An Animal Contest 2 P4 - Koala Gambling

on Nov. 28, 2025, 6:21 p.m.

12pp

weighted 70% (8.4pp)

15 / 15

AC | C++20

CCC '16 S3 - Phonomenal Reviews

on Nov. 10, 2025, 9:39 p.m.

12pp

weighted 66% (8.0pp)

100 / 100

AC | C++20

DMOPC '15 Contest 2 P4 - Personal Assistant

on Oct. 7, 2025, 10:39 p.m.

12pp

weighted 63% (7.6pp)

Problem	Score
An Animal Contest 1 P1 - Alpaca Shapes	3 / 3
An Animal Contest 1 P2 - Alpaca Racing	5 / 5
An Animal Contest 1 P3 - Happy Alpacas	7 / 7
An Animal Contest 1 P4 - Alpaca Arrays	10 / 10
An Animal Contest 1 P5 - Odd Alpacas	12 / 12
An Animal Contest 2 P0 - Koala Matchmaking	3 / 3
An Animal Contest 2 P1 - Koala Konundrum	5 / 5
An Animal Contest 2 P2 - Koala Party	5 / 5
An Animal Contest 2 P3 - Koala Balloons	12 / 12
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 3 P3 - Monkey Market	7 / 7
An Animal Contest 4 P1 - Dasher's Digits	5 / 5
An Animal Contest 5 P1 - Bamboo Cookies	3 / 3
An Animal Contest 5 P2 - Permutations & Products	5 / 5
An Animal Contest 6 P1 - Workout Routine	5 / 5
An Animal Contest 7 P1 - Squirrnect 4	3 / 3

Problem	Score
Another Contest 3 Problem 1 - Diverse Arrays	7 / 7
Another Contest 5 Problem 1 - Goat Fence	3 / 3
Another Contest 5 Problem 2 - Great Graffiti	5 / 5
Another Contest 5 Problem 3 - Cutting Cheese Costs	5 / 5
Another Contest 8 Problem 1 - Trash Push	3 / 3
Another Contest 8 Problem 2 - Unnecessary Trash Push	3 / 3

Problem	Score
CCC '00 J1 - Calendar	5 / 5
CCC '00 J2 - 9966	3 / 3
CCC '00 S1 - Slot Machines	5 / 5
CCC '00 S2 - Babbling Brooks	7 / 7
CCC '00 S4 - Golf	7 / 7
CCC '01 J1 - Dressing Up	3 / 3
CCC '01 S1 - Keeping Score	5 / 5
CCC '01 S2 - Spirals	5 / 5
CCC '02 J1 - 0123456789	3 / 3
CCC '03 J1 - Trident	3 / 3
CCC '03 J2 - Picture Perfect	3 / 3
CCC '03 S2 - Poetry	5 / 5
CCC '03 S3 - Floor Plan	7 / 7
CCC '04 J1 - Squares	3 / 3
CCC '04 J2 - Terms of Office	3 / 3
CCC '04 J3 - Smile with Similes	3 / 3
CCC '05 J1 - The Cell Sell	3 / 3
CCC '05 J2 - RSA Numbers	3 / 3
CCC '05 J3 - Returning Home	5 / 5
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 S1 - Maternity	5 / 5
CCC '07 J1 - Who is in the Middle?	3 / 3
CCC '07 J4 - Anagram Checker	5 / 5
CCC '07 S3 - Friends	7 / 7
CCC '08 J2 - Do the Shuffle	3 / 3
CCC '08 J4 - From Prefix to Postfix	7 / 7
CCC '08 S1 - It's Cold Here!	5 / 5
CCC '09 J1 - ISBN	3 / 3
CCC '09 J3 - Good Times	5 / 5
CCC '09 S3 - Degrees Of Separation	10 / 10
CCC '09 S4 - Shop and Ship	10 / 10
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	3 / 5
CCC '10 S3 - Firehose	15 / 15
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 S1 - English or French?	5 / 5
CCC '11 S2 - Multiple Choice	3 / 3
CCC '12 J1 - Speed fines are not fine!	3 / 3
CCC '12 J2 - Sounds fishy!	3 / 3
CCC '12 J4 - Big Bang Secrets	3 / 3
CCC '12 S2 - Aromatic Numbers	5 / 5
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 S5 - Factor Solitaire	15 / 15
CCC '14 J1 - Triangle Times	3 / 3
CCC '14 J2 - Vote Count	3 / 3
CCC '14 J3 - Double Dice	3 / 3
CCC '14 S2 - Assigning Partners	5 / 5
CCC '14 S3 - The Geneva Confection	7 / 7
CCC '14 S5 - Lazy Fox	4 / 20
CCC '15 J1 - Special Day	3 / 3
CCC '15 J4 - Wait Time	1.667 / 5
CCC '15 J5 - π-day	10 / 10
CCC '15 S2 - Jerseys	5 / 5
CCC '15 S3 - Gates	10 / 10
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 '16 S3 - Phonomenal Reviews	12 / 12
CCC '16 S5 - Circle of Life	20 / 20
CCC '17 S2 - High Tide, Low Tide	5 / 5
CCC '17 S3 - Nailed It!	7 / 7
CCC '19 J2 - Time to Decompress	3 / 3
CCC '19 J3 - Cold Compress	5 / 5
CCC '19 S2 - Pretty Average Primes	5 / 5
CCC '20 J2 - Epidemiology	3 / 3
CCC '20 J4 - Cyclic Shifts	5 / 5
CCC '20 S1 - Surmising a Sprinter's Speed	5 / 5
CCC '20 S2 - Escape Room	10 / 10
CCC '21 J3 - Secret Instructions	5 / 5
CCC '21 S2 - Modern Art	7 / 7
CCC '22 J1 - Cupcake Party	3 / 3
CCC '22 J3 - Harp Tuning	5 / 5
CCC '22 S2 - Good Groups	5 / 5
CCC '23 J2 - Chili Peppers	3 / 3
CCC '24 J1 - Conveyor Belt Sushi	3 / 3
CCC '24 J5 - Harvest Waterloo	7 / 7
CCC '24 S1 - Hat Circle	3 / 3
CCC '24 S2 - Heavy-Light Composition	5 / 5
CCC '24 S3 - Swipe	10 / 10
CCC '25 J3 - Product Codes	5 / 5
CCC '25 J4 - Sunny Days	5 / 5
CCC '25 J5 - Connecting Territories	7 / 7
CCC '25 S2 - Cryptogram Cracking Club	7 / 7
CCC '97 S1 - Sentences	5 / 5
CCC '97 S2 - Nasty Numbers	5 / 5
CCC '99 S1 - Card Game	5 / 5
CCCHK '08 J1 - Best fish	3 / 3
CCCHK '08 J2 - Lucky Number	3 / 3
CCCHK '08 J3 - Phone book	5 / 5
CCCHK '15 J4 - Where to build my house?	5 / 5
CCCHK '15 S2 - Matching Problem	3.750 / 10

Problem	Score
Sorting	3 / 3
Next Prime	5 / 5

Problem	Score
COCI '06 Contest 1 #2 Herman	5 / 5
COCI '06 Contest 2 #1 R2	3 / 3
COCI '06 Contest 2 #3 Kolone	7 / 7
COCI '08 Contest 1 #2 Ptice	5 / 5
COCI '09 Contest 1 #2 Domino	5 / 5
COCI '14 Contest 1 #1 Prosjek	5 / 5
COCI '17 Contest 2 #2 ZigZag	5 / 5
COCI '18 Contest 2 #1 Preokret	5 / 5

User Oson

Points breakdown

AAC (110 points)

ACC (26 points)

Baltic OI (4.900 points)

BlueBook (3 points)

Bubble Cup (10 points)

CCC (517.417 points)

CCO (1.200 points)

China NOI (7 points)

Classics (8 points)

COCI (40 points)

Data Structure Tests (10 points)

DMOPC (30 points)

DWITE (17 points)

ECOO (10 points)

EGOI (7 points)

GFSSOC (24 points)

ICPC (31 points)

IOI (27 points)

JOI (5 points)

Mock CCC (32 points)

SAC Coding Challenge (5 points)

Seasonal (17 points)

Uncategorized (266.600 points)

Woburn Challenge (23 points)

Problem	Score
DMOPC '15 Contest 1 P2 - Itami and Squad	5 / 5
DMOPC '15 Contest 2 P4 - Personal Assistant	12 / 12
DMOPC '19 Contest 5 P1 - Conspicuous Cryptic Checklist	5 / 5
DMOPC '20 Contest 1 P1 - Victor Gets Quizzed	3 / 3
DMOPC '22 Contest 1 P1 - Up-down Sequence	5 / 5

Problem	Score
DWITE '06 R5 #5 - Prime Palindromes	10 / 10
DWITE '07 R2 #3 - Floor Plan	7 / 7

Problem	Score
ECOO '19 R2 P1 - Email	5 / 5
ECOO '20 P2 - Online Shopping	5 / 5

Problem	Score
GFSSOC '17 J3 - AIF Essay	5 / 5
GFSSOC '15 Fall J4 - Marathon	7 / 7
GFSSOC '15 Winter J3 - Christmas Presents	5 / 5
GFSSOC '15 Winter S3 - PalinDrone	7 / 7

Problem	Score
ACM U of T Tryouts C0 B - Interleaving Leaves	5 / 5
ACM U of T Tryouts C1 B - The Foxen's Treasure	5 / 5
ACM U of T Tryouts C2 A - The Super Mario Blues	5 / 5
ACM U of T Tryouts C3 A - A Research Project	3 / 3
ACM U of T Tryouts C3 B - A Careful Reply	3 / 3
ICPC NAQ 2016 C - Big Truck	10 / 10

Problem	Score
IOI '04 P4 - Phidias	10 / 10
IOI '14 Practice Task 2 - Station	7 / 7
IOI '99 P1 - Little Shop of Flowers	10 / 10

Problem	Score
Mock CCC '22 Contest 2 J1 - Opening Ceremony	3 / 3
Mock CCC '22 Contest 2 J3 - Figure Skating Fun	5 / 5
Mock CCC '24 Contest 1 J3 - RGB Words	2 / 5
Mock CCC '18 Contest 1 J3/S1 - A Math Problem	5 / 5
Mock CCC '18 Contest 3 J3/S1 - A String Problem	5 / 5
Mock CCC '18 Contest 5 J5/S3 - Directed Graph Connectivity	7 / 7
Valentine's Day '18 J3 - Are they cute?	5 / 5

Problem	Score
Back From Summer '17 P2: Crayola Lightsaber	7 / 7
Back To School '17: Wet Mud	10 / 10

Problem	Score
16 BIT S/W ONLY	3 / 3
2048	15 / 15
2spooky4me	7 / 7
Rotations in 3 Dimensions	12 / 12
Mispelling	3 / 3
Mirrored Pairs	3 / 3
A20 Gate	5 / 5
Triple Fat Ladies	5 / 5
Appleby Contest '19 P1 - Darcy's Debilitating Demands	3 / 3
Appleby Contest '19 P2 - The Love Letter	5 / 5
Appleby Contest '19 P5 - Matrix Operation	10 / 10
Appleby Contest '20 P2 - Playful Playdoughs	5 / 5
ACSL '09 Practice P4 - Rank	7 / 7
Arcadia Computing Contest 1 P2 - Chemistry	5 / 5
Arcadia Computing Contest 1 P3 - ScanTron	5 / 5
Arcadia Computing Contest 2 P1 - Rejected	3 / 3
Amplitude Hackathon '23 Practice Problem 2 - Go Amplitude!	5 / 5
Amplitude Hackathon Summer '24 Problem 3 - Mike's Unlocked Laptop	5 / 5
Troubling Times	5 / 5
Another Sorting	5 / 5
A Plus B	3 / 3
A Plus B (Hard)	12 / 12
Another Random Contest 1 P1 - Chessgame	5 / 5
Avocado Trees!	5 / 5
List Minimum	3 / 3
List Minimum (Easy)	3 / 3
List Minimum (Hard)	5 / 5
Lexicographically Least Substring	5 / 5
String Finding	5 / 5
Binary	5 / 5
A Block Game	3 / 3
Bob's Rocks	5 / 5
Bob's Temple	5 / 5
Boolean	3 / 3
BPC 1 J3 - Group Project	5 / 5
BSSPC '22 P3 - Searching for Seats	5 / 5
Cheerio Contest 1 J3 - Festival	5 / 5
Chocolate Bar	5 / 5
Dilhan's Computing Contest 1 P2 - Square Sum	9.600 / 12
Hello, World!	3 / 3
Infinity	3 / 3
Postfix Notation	7 / 7
Primes	3 / 3
Primes 2	15 / 15
RTE '16 J1 - Board Game	3 / 3
The Cosmic Era P2 - Uneven Sand	5 / 5
The DMOJ Driveway	5 / 5
Tree Tasks	10 / 10

Problem	Score
WC '15 Contest 1 J3 - Jazz Concert	5 / 5
WC '15 Contest 2 J3 - Return of the Jedi	5 / 5
WC '17 Contest 1 J2 - How's the Weather?	3 / 3
WC '17 Contest 3 J3 - Uncrackable	5 / 5
WC '18 Contest 4 J3 - Inventory	5 / 5