• OlympiadsOJ
  • Home
  • Problems
  • Submissions
  • Users
  • Contests
  • About
    >
    • Status
    • Tips
    • API
    • Github
Log in  or  Sign up

User yz

  • About
  • Problems

126 problems solved
Rank by points: #277
Total points: 500

View submissions

Points breakdown

100 / 100
AC | PYPY3
Phantom's Python Challenge
on Feb. 25, 2025, 6:17 p.m.
40pp
weighted 100% (40pp)
100 / 100
AC | C++17
IOI '14 P6 - Holiday (Standard I/O)
on May 1, 2025, 4:01 p.m.
30pp
weighted 95% (29pp)
100 / 100
AC | C++17
IOI '14 P6 - Holiday
on May 1, 2025, 3:58 p.m.
30pp
weighted 90% (27pp)
100 / 100
AC | C++17
IOI '04 P6 - Empodia
on Feb. 19, 2025, 11:43 p.m.
30pp
weighted 86% (26pp)
100 / 100
AC | TEXT
IOI '12 P1 - Pebbling Odometer
on Feb. 19, 2025, 11:43 p.m.
30pp
weighted 81% (24pp)
100 / 100
AC | C++17
Bulgarian OI '09 P5 - Special Sequence
on Feb. 19, 2025, 11:38 p.m.
30pp
weighted 77% (23pp)
100 / 100
AC | C++17
IOI '14 P5 - Friend
on Feb. 19, 2025, 11:34 p.m.
30pp
weighted 74% (22pp)
100 / 100
AC | C++17
IOI '14 P5 - Friend (Standard I/O)
on Feb. 19, 2025, 11:34 p.m.
30pp
weighted 70% (21pp)
100 / 100
AC | C++17
TLE '16 Contest 1 P6 - A Very Normal Test
on May 1, 2025, 3:00 p.m.
25pp
weighted 66% (17pp)
100 / 100
AC | C++17
UTS Open '15 #3 - Pogo
on April 10, 2025, 1:05 a.m.
25pp
weighted 63% (16pp)
Load more...

AAC (12 points)

Problem Score
An Animal Contest 2 P4 - Koala Gambling 12 / 12

ACC (15 points)

Problem Score
Another Contest 2 Problem 1 - Poutine 15 / 15

Baltic OI (24 points)

Problem Score
Baltic OI '03 P4 - The Gangs 12 / 12
Baltic OI '13 P5 - Tracks in the Snow 12 / 12

Bulgarian OI (30 points)

Problem Score
Bulgarian OI '09 P5 - Special Sequence 30 / 30

CCC (334.133 points)

Problem Score
CCC '00 S2 - Babbling Brooks 7 / 7
CCC '05 S5 - Pinball Ranking 12 / 12
CCC '10 S3 - Firehose 15 / 15
CCC '11 S5 - Switch 12 / 12
CCC '12 S4 - A Coin Game 15 / 15
CCC '13 S5 - Factor Solitaire 15 / 15
CCC '14 S4 - Tinted Glass Window 15 / 15
CCC '14 S5 - Lazy Fox 20 / 20
CCC '15 S4 - Convex Hull 15 / 15
CCC '15 S5 - Greedy For Pies 1.133 / 17
CCC '16 S3 - Phonomenal Reviews 12 / 12
CCC '16 S4 - Combining Riceballs 15 / 15
CCC '16 S5 - Circle of Life 20 / 20
CCC '17 S4 - Minimum Cost Flow 17 / 17
CCC '18 S3 - RoboThieves 10 / 10
CCC '18 S5 - Maximum Strategic Savings 20 / 20
CCC '20 S2 - Escape Room 10 / 10
CCC '20 S3 - Searching for Strings 12 / 12
CCC '20 S4 - Swapping Seats 12 / 12
CCC '21 S4 - Daily Commute 12 / 12
CCC '22 S4 - Good Triplets 15 / 15
CCC '23 S2 - Symmetric Mountains 7 / 7
CCC '23 S4 - Minimum Cost Roads 15 / 15
CCC '24 S4 - Painting Roads 12 / 12
CCC '25 S4 - Floor is Lava 8 / 12
CCC '96 S1 - Deficient, Perfect, and Abundant 5 / 5
CCC '97 S4 - Dynamic Dictionary Coding 5 / 5

CCO (74 points)

Problem Score
CCO '12 P2 - The Hungary Games 15 / 15
CCO '13 P2 - Tourney 12 / 12
CCO '13 P6 - Repetitivity 25 / 25
CCO '15 P4 - Cars on Ice 10 / 10
CCO '18 P2 - Wrong Answer 12 / 12

Classics (32 points)

Problem Score
Next Prime (Hard) 15 / 15
Longest Increasing Subsequence 10 / 10
Single Source Shortest Path 7 / 7

COCI (67.500 points)

Problem Score
COCI '06 Contest 1 #5 Bond 12 / 12
COCI '06 Contest 5 #5 Ivana 15 / 15
COCI '09 Contest 4 #4 Ograda 15 / 15
COCI '10 Contest 3 #5 Diferencija 12 / 12
COCI '14 Contest 2 #3 Studentsko 12 / 12
COCI '17 Contest 5 #4 Karte 1.500 / 15

CTF (12 points)

Problem Score
DMOJ Capture The Flag '20 R4 - Python Cycles 12 / 12

Data Structure Tests (25 points)

Problem Score
Binary Indexed Tree Test 10 / 10
Segment Tree Test 15 / 15

DMOPC (183 points)

Problem Score
DMOPC '14 Contest 2 P5 - Sawmill Scheme 10 / 10
DMOPC '15 Contest 1 P6 - Lelei and Contest 17 / 17
DMOPC '15 Contest 2 P4 - Personal Assistant 12 / 12
DMOPC '16 Contest 1 P5 - Blood Tubes 12 / 12
DMOPC '16 Contest 4 P3 - Carnival Phantasm 10 / 10
DMOPC '17 Contest 1 P4 - Quests 12 / 12
DMOPC '18 Contest 4 P4 - Dr. Henri and Lab Data 12 / 12
DMOPC '19 Contest 3 P3 - Majority 12 / 12
DMOPC '21 Contest 10 P5 - Number Theory 20 / 20
DMOPC '22 Contest 5 P6 - Threes and Twos 20 / 20
DMPG '15 S6 - Apples to Oranges 17 / 17
DMPG '16 S5 - Pizza Bag 12 / 12
DMPG '17 G2 - Holy Grail War 17 / 17

GFSSOC (15 points)

Problem Score
GFSSOC '15 Fall S4 - Mostly Talking 15 / 15

IOI (195 points)

Problem Score
IOI '01 P1 - Mobile Phones 15 / 15
IOI '04 P6 - Empodia 30 / 30
IOI '12 P1 - Pebbling Odometer 30 / 30
IOI '14 P5 - Friend 30 / 30
IOI '14 P5 - Friend (Standard I/O) 30 / 30
IOI '14 P6 - Holiday 30 / 30
IOI '14 P6 - Holiday (Standard I/O) 30 / 30

Seasonal (32 points)

Problem Score
Back To School '18: An FFT Problem 10 / 10
Halloween '14 P2 - Cat Girls 12 / 12
Sword Art Online Judge 2 10 / 10

TLE (25 points)

Problem Score
TLE '16 Contest 1 P6 - A Very Normal Test 25 / 25

TSOC (27 points)

Problem Score
TSOC '15 Contest 2 #6 - All-Out War! 15 / 15
TSOC '16 Contest 1 #6 - Joey and Biology 12 / 12

Uncategorized (553 points)

Problem Score
A Times B 20 / 20
Lexicographically Least Substring (Hard) 15 / 15
Fast Search 15 / 15
Checkerboard Summation (Hard) 15 / 15
CPC '21 Contest 1 P4 - AQT and Directed Graph 12 / 12
Dr. Anne Anderson Coding Contest 1 P1 - Due Dates 3 / 3
Dr. Anne Anderson Coding Contest 1 P2 - Pokemon Battles 3 / 3
Dr. Anne Anderson Coding Contest 1 P3 - The Unwritten Rules 5 / 5
Dr. Anne Anderson Coding Contest 1 P4 - Lighting 5 / 5
Dr. Anne Anderson Coding Contest 1 P5 - Guessing Grades 7 / 7
Dr. Anne Anderson Coding Contest 1 P6 - Designing An Academic Course Calendar 10 / 10
Please Help Me 15 / 15
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 M - Candies 12 / 12
Educational DP Contest AtCoder N - Slimes 12 / 12
Fast Factorial Calculator 2 20 / 20
Fibonacci Sequence 15 / 15
Fibonacci Sequence (Harder) 17 / 17
Good Strategy 10 / 10
Hello, World! 3 / 3
Levve Loves Segment Trees 15 / 15
Phantom's Python Challenge 40 / 40
Pick It 15 / 15
Primes 2 15 / 15
Self-deception 15 / 15
Disclosure 10 / 10
Decoding 20 / 20
South African Computer Olympiad 2008 Day 1 Problem 3 - Visiting Grandma 15 / 15
Dynamic Range Minimum Test 12 / 12
Python Infinite Loop 7 / 7
SMAC 08/09 (Oct) #3 - Jumpscotch 12 / 12
STNBD P2 - Claire Elstein 12 / 12
Segment Tree Practice 1 12 / 12
Segment Tree Practice 2 12 / 12
Segment Tree Practice 3 15 / 15
Threes 3 / 3
UTS Open '15 #3 - Pogo 25 / 25
UTS Open '15 #6 - Tetrahedra 25 / 25
XOR Minimum 17 / 17

VM7WC (15 points)

Problem Score
VM7WC '16 #2 Gold - GGG 15 / 15

fork us on Github | like us on Facebook | help us translate | terms of service |