User richardzhang_git

Points breakdown

100 / 100

AC | PYPY3

VM7WC '16 #2 Gold - GGG

on April 11, 2026, 11:40 p.m.

15pp

weighted 100% (15pp)

30 / 30

AC | PY3

CCC '10 S4 - Animal Farm

on Feb. 10, 2026, 1:22 a.m.

15pp

weighted 95% (14pp)

15 / 15

AC | PY3

CCC '23 S4 - Minimum Cost Roads

on Feb. 1, 2026, 1:56 a.m.

15pp

weighted 90% (14pp)

25 / 25

AC | PY3

CCO '12 P2 - The Hungary Games

on Jan. 26, 2026, 7:59 p.m.

15pp

weighted 86% (13pp)

100 / 100

AC | PY3

South African Computer Olympiad 2008 Day 1 Problem 3 - Visiting Grandma

on Jan. 25, 2026, 12:31 a.m.

15pp

weighted 81% (12pp)

100 / 100

AC | C++20

GFSSOC '15 Fall S4 - Mostly Talking

on Jan. 20, 2026, 11:37 p.m.

15pp

weighted 77% (12pp)

25 / 25

AC | PY3

CCO '11 P2 - Vampire Tunnels

on Jan. 18, 2026, 10:54 p.m.

15pp

weighted 74% (11pp)

15 / 15

AC | PY3

CCC '15 S4 - Convex Hull

on Jan. 18, 2026, 10:40 p.m.

15pp

weighted 70% (10pp)

15 / 15

AC | PY3

CCC '02 S3 - Blindfold

on Jan. 18, 2026, 4:32 p.m.

15pp

weighted 66% (10.0pp)

100 / 100

AC | PY3

COCI '14 Contest 2 #3 Studentsko

on April 12, 2026, 12:04 a.m.

12pp

weighted 63% (7.6pp)

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 S3 - Surfing	3.267 / 7
CCC '00 S4 - Golf	7 / 7
CCC '00 S5 - Sheep and Coyotes	6.667 / 10
CCC '01 J1 - Dressing Up	3 / 3
CCC '01 J2 - Mod Inverse	3 / 3
CCC '01 S1 - Keeping Score	5 / 5
CCC '01 S2 - Spirals	5 / 5
CCC '02 J1 - 0123456789	3 / 3
CCC '02 J1 - 0123456789 (Hard)	5 / 5
CCC '02 J2 - AmeriCanadian	3 / 3
CCC '02 S1 - The Students' Council Breakfast	5 / 5
CCC '02 S2 - Fraction Action	5 / 5
CCC '02 S3 - Blindfold	15 / 15
CCC '02 S4 - Bridge Crossing	10 / 10
CCC '03 J2 - Picture Perfect	3 / 3
CCC '03 S1 - Snakes and Ladders	5 / 5
CCC '03 S2 - Poetry	5 / 5
CCC '03 S3 - Floor Plan	7 / 7
CCC '03 S4 - Substrings	7 / 15
CCC '03 S5 - Trucking Troubles	7.500 / 10
CCC '04 J1 - Squares	3 / 3
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 '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	3.200 / 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 J5 - CCC Othello	10 / 10
CCC '06 S1 - Maternity	5 / 5
CCC '06 S2 - Attack of the CipherTexts	5 / 5
CCC '06 S3 - Tin Can Telephone	12 / 12
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 S4 - Waterpark	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 J4 - From Prefix to Postfix	7 / 7
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 '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	5.625 / 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	5 / 5
CCC '10 J5 - Knight Hop	7 / 7
CCC '10 S1 - Computer Purchase	5 / 5
CCC '10 S2 - Huffman Encoding	5 / 5
CCC '10 S4 - Animal Farm	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 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 '11 S4 - Blood Distribution	7.500 / 15
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 S1 - Don't pass me the ball!	3 / 3
CCC '12 S2 - Aromatic Numbers	5 / 5
CCC '12 S3 - Absolutely Acidic	7 / 7
CCC '12 S5 - Mouse Journey	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?	2.100 / 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 S4 - Convex Hull	15 / 15
CCC '17 S3 - Nailed It!	7 / 7
CCC '17 S4 - Minimum Cost Flow	11 / 17
CCC '18 S3 - RoboThieves	10 / 10
CCC '18 S4 - Balanced Trees	9 / 15
CCC '19 S2 - Pretty Average Primes	5 / 5
CCC '19 S3 - Arithmetic Square	12 / 12
CCC '21 J4 - Arranging Books	7 / 7
CCC '22 J3 - Harp Tuning	5 / 5
CCC '22 J5 - Square Pool	10 / 10
CCC '22 S1 - Good Fours and Good Fives	5 / 5
CCC '22 S2 - Good Groups	5 / 5
CCC '22 S3 - Good Samples	10 / 10
CCC '23 S2 - Symmetric Mountains	2.333 / 7
CCC '23 S4 - Minimum Cost Roads	15 / 15
CCC '24 S3 - Swipe	4.667 / 10
CCC '25 S3 - Pretty Pens	3.333 / 10
CCC '25 S4 - Floor is Lava	12 / 12
CCC '26 J3 - Creative Candy Consumption	3 / 3
CCC '26 J4 - Snail Path	5 / 5
CCC '26 S1 - Baby Hop, Giant Hop	5 / 5
CCC '26 S2 - Beams of Light	7 / 7
CCC '26 S3 - Common Card Choice	7 / 7

Problem	Score
CCO '07 P2 - Snowflakes	10 / 10
CCO '08 P5 - Candy	6.731 / 7
CCO '10 P4 - Computer Purchase Return	10 / 10
CCO '11 P2 - Vampire Tunnels	15 / 15
CCO '12 P2 - The Hungary Games	15 / 15
CCO '14 P1 - Troyangles	4.400 / 10
CCO '18 P1 - Geese vs. Hawks	10 / 10
CCO '24 P1 - Treasure Hunt	2 / 10
CCO '97 P2 - Alien Invasion	10 / 10
CCO '98 P5 - Text Segmentation	10 / 10

Problem	Score
CIW '26 P1 - Shopping Mall	10 / 10
CIW '26 P2 - Number Shuffle	6.240 / 12
CIW '26 P3 - Gumball Machine	7 / 7

Problem	Score
Sorting	3 / 3
Longest Increasing Subsequence	10 / 10

Problem	Score
COCI '07 Contest 4 #4 Muzicari	10 / 10
COCI '12 Contest 6 #3 Dobri	4.900 / 7
COCI '14 Contest 2 #3 Studentsko	12 / 12
COCI '14 Contest 6 #4 Kratki	10 / 10
COCI '16 Contest 4 #3 Kas	10 / 10
COCI '20 Contest 1 #2 Bajka	7 / 7
COCI '22 Contest 4 #2 Zrinka	10 / 10
COCI '07 Regional #2 Nikola	10 / 10

User richardzhang_git

Points breakdown

AAC (12 points)

CCC (804.192 points)

CCO (93.131 points)

CIW (23.240 points)

Classics (13 points)

COCI (73.900 points)

DMOPC (95 points)

DWITE (7 points)

GFSSOC (15 points)

ICPC (14 points)

IOI (7 points)

JOI (5 points)

SAC Coding Challenge (7 points)

Seasonal (37.200 points)

Uncategorized (196.050 points)

VM7WC (32 points)

Waterloo Local (10 points)

Woburn Challenge (7 points)

YAC (5 points)

Problem	Score
DMOPC '13 Contest 3 P5 - A Romantic Dinner	10 / 10
DMOPC '14 Contest 3 P6 - Not Enough Time!	10 / 10
DMOPC '14 Exam Time P4 - Exam Delay	10 / 10
DMOPC '16 Contest 1 P3 - Shoe Shopping	7 / 7
DMOPC '16 Contest 4 P5 - Migrant Mascot	10 / 10
DMOPC '17 Contest 1 P1 - Fujō Neko	5 / 5
DMOPC '17 Contest 1 P3 - Hitchhiking Fun	7 / 7
DMOPC '17 Contest 1 P4 - Quests	12 / 12
DMOPC '17 Contest 5 P1 - IOI 101	3 / 3
DMOPC '18 Contest 3 P2 - Bob and French Class	7 / 7
DMOPC '18 Contest 4 P2 - Dr. Henri and Responsibility	7 / 7
DMOPC '19 Contest 2 P2 - Squares	7 / 7

Problem	Score
ACM U of T Tryouts C2 D - Diablo Bot	7 / 7
ICPC PACNW 2016 A - Alphabet	7 / 7

Problem	Score
Halloween '14 P2 - Cat Girls	10.200 / 12
MEC '16 P3 - Getting Good at Programming	10 / 10
Miracle Sort	3 / 3
Piggy	7 / 7
Too Simple	7 / 7

Problem	Score
16 BIT S/W ONLY	3 / 3
Arcadia Computing Contest 1 P4 - Cyclic Sorting	7 / 7
Arcadia Computing Contest 2 P2 - Tennis	5 / 5
Arcadia Computing Contest 2 P4 - Choose Your Own Adventure!	7 / 7
Arcadia Computing Contest 2 P5 - lp0 is on fire!	10 / 10
Amplitude Hackathon '23 Practice Problem 2 - Go Amplitude!	5 / 5
Amplitude Hackathon '23 Practice Problem 3 - Demo Day Demos	5 / 5
Amplitude Hackathon Summer '24 Problem 3 - Mike's Unlocked Laptop	5 / 5
Amplitude Hackathon Summer '24 Problem 4 - Spenser's Big Announcement	5 / 5
List Minimum	3 / 3
List Minimum (Easy)	3 / 3
List Minimum (Hard)	5 / 5
Boolean	3 / 3
Coin Change	7 / 7
Maximum Sum	7 / 7
Educational DP Contest AtCoder A - Frog 1	7 / 7
Educational DP Contest AtCoder B - Frog 2	7 / 7
Educational DP Contest AtCoder C - Vacation	7 / 7
Educational DP Contest AtCoder D - Knapsack 1	7 / 7
Educational DP Contest AtCoder E - Knapsack 2	7 / 7
Educational DP Contest AtCoder F - LCS	7 / 7
Educational DP Contest AtCoder I - Coins	10 / 10
Exam Prep	1.050 / 7
Knapsack 3	10 / 10
South African Computer Olympiad 2008 Day 1 Problem 3 - Visiting Grandma	15 / 15
Summing A Sequence	7 / 7
Coding Spree	7 / 7
The Contest Contest 1 P2 - A Typical CCC Senior Problem	10 / 10
UCC Coding Competition '20 P4 - Bubble Tea	7 / 7
Valentine's Day '19 J3 - Love!	7 / 7

Problem	Score
VM7WC '15 #4 Gold - Chain Rule	10 / 10
VM7WC '16 #2 Gold - GGG	15 / 15
VM7WC '16 #5 Silver - Jayden Eats Chocolate	7 / 7