45
kurosawa4434
● 23 ● 44 ● 60 Leader of the month
15842/ 17173
Awesome Team Masayuki Hayashi
Last seen 5 minutes ago
Member for 8 years, 2 months, 7 days
Difficulty Normal
Missions (538) / Solutions (409)
 Initiation
Easy Unpack
7
 508 1
The Most Frequent
24
 62 6
Correct Sentence
5
All the Same
28
 48 2
Multiply (Intro)
5
Between Markers (simplified)
5
First Word (simplified)
5
Nearest Value
13
 180 3
Split Pairs
10
 360 1
Replace First
20
 22 13
Remove All Before
5
End Zeros
10
 217 3
Number Length
76
 2 69
Backward String
5
All Upper I
5
Beginning Zeros
10
 413 1
Max Digit
17
 37 10
Sum Numbers
5
 721
Count Digits
7
 381 1
Acceptable Password I
5
Is Even
5
 41
 Home
Non-unique Elements
18
 461 8
Even the Last
5
 2571
Three Words
13
 238 6
Pawn Brotherhood
28
 729 2
Right to Left
13
 275 6
Days Between
5
 1517
Bigger Price
13
 356 3
Second Index
20
 36 10
Between Markers
8
 762
First Word
16
 122 6
Popular Words
8
 829
Date and Time Converter
91
 2 81
Morse Decoder
14
 125 4
Sun Angle
15
 764
Sort Array by Element Frequency
12
 353 2
Split List
22
 364 1
Backward Each Word
10
 319 1
Changing direction
15
 40
Missing Number
15
 46
Duplicate Zeros
0
 Electronic Station
Find Sequence
15
 394
Brackets
30
 926
Mathematically Lucky Tickets
15
 124
Digits Multiplication
14
 316 4
Verify Anagrams
44
 132 8
Can You Pass?
64
 31 3
Boolean Algebra
32
 217 3
Inside Block
82
 3 18
Unix Match. Part 1
69
 25 7
Unix Match. Part 2
40
 55 1
Ascending List
112
 1 102
Surjection Strings
229
 1 193
Remove Brackets
15
Similar Triangles
60
Words Order
8
All Upper II
5
Sort by Extension
22
 180 1
Acceptable Password II
10
 237 1
Acceptable Password III
8
Acceptable Password IV
8
Acceptable Password V
8
Acceptable Password VI
8
Cipher Dict
12
 13
Cipher Dict (decryption)
12
Blood distribution
36
 1 15
 Scientific Expedition
Morse Clock
44
 65 5
The Most Wanted Letter
10
 918 1
Striped Words
15
 658
The Hidden Word
20
 223
Common Words
8
 1298
Absolute Sorting
7
 1145 1
Cipher Map
20
 373
Remove Accents
8
Call to Home
44
 31 5
Bird Language
77
 4 67
Letter Queue
8
 607
I Love Python!
5
Secret Message
32
 477 3
Pangram
8
 1013
Follow Instructions
104
 2 94
Conversion into CamelCase
12
 218 2
Conversion from CamelCase
8
 321
Time Converter (24h to 12h)
39
 129 5
Caps Lock
119
 1 109
YAML. Simple Dict
15
YAML. More Types
20
Sum by Type
8
 273
Goes Right After
10
 233 1
Convert and Aggregate
12
 22 3
Nonogram Encode
15
 1
Latest ISO datetime
9
Beat The Previous
9
Count Vowels
6
Convert To Title Case
9
Replace All Occurrences
9
Longest Substring of Unique Characters
12
Count Substring Occurrences
9
Fuzzy String Matching
12
Combining Celebrity Names
19
 4 5
Water Sort Game
12
 4
 O'Reilly
Loading Cargo
83
 12 9
Determine the Order
30
 96
Median
10
 1135 1
Cipher Crossword
40
 21 1
Xs and Os Referee
21
 374 3
Parse Array
30
Flatten a List
12
 799
The Flat Dictionary
37
 48 3
Index Power
5
 2283
Count Inversions
14
 69 4
Frequency Sorting
17
 40 7
Time Converter (12h to 24h)
44
 22 8
Flatten a List (iterator version)
12
Flatten a List (generator version)
12
Median of Three
8
Reverse Every Ascending
14
 44 4
How Deep
62
 3 26
Replace Last
5
Compress List
18
 28 8
Remove All After
50
 2 43
Majority
8
Chunk
8
Sort Except Zero
88
 2 52
Lightbulb Intro
36
 58 4
Lightbulb Start Watching
28
 59 2
Lightbulb End Watching
70
 3 34
Multiple Lightbulbs
33
 17 2
Lightbulb Operating
20
 1
Lightbulb More
20
 37
The Final Stone
48
 1 27
Integer Palindrome
9
Sum of Digits
14
 31 2
Knapsack Problem
15
The Hollow Diamond
24
 2 4
Exploring Wythoff Array
15
Flip of Time
12
Ordinary Cardinals
27
 2 6
Grid Painting
15
 5
Archipelago
15
Matrix-2-String
9
 8
String-2-Matrix
19
 2 5
 Incinerator
Building Base
15
 573
Friends
15
 446
Every Person is Unique
22
 59 1
3 Chefs
15
Geometry Figures
15
Capital City
15
Multicolored Lamp
15
Microwave Ovens
15
Voice TV Control
15
Hacker Language
15
Dialogues
15
Party Invitations
22
 47 1
Army Units
50
 6 14
Text Editor
36
 22 4
The Warriors
15
Army Battles
15
The Defenders
15
The Vampires
8
The Lancers
20
The Healers
20
Straight Fight
20
The Weapons
15
The Warlords
30
 Mine
Determinant
29
 2 19
Disposable Teleports
43
 9 7
Binary Count
16
 209 6
Fizz Buzz
10
 415 3
Achilles and the Tortoise
11
 46 4
The Greatest Common Divisor
8
Moore Neighbourhood
12
 443 2
Color Map
20
 54
The Einstein Problem-Lite
28
 15 2
Currency Style
20
 7 10
What Is Wrong With This Family?
61
 9 10
Find Enemy
104
 4 10
Cut Sentence
84
 2 74
Bigger Together
63
 2 53
Domino Chain
18
 8 8
Best Stock
8
 673
Caesar Cipher (encryptor)
25
 7 15
Caesar Cipher (decryptor)
8
 80
Chess Knight
39
 14 5
Chemical Analysis
12
 8
Fast Train
16
Can Balance
36
 38 4
Escape
27
 14 1
Aggregate by Operation
12
Adjacent Letters
37
 3 9
Long Pressed
16
 20 1
Switch Keys to Values
19
 6 5
Replace with Biggest
9
 33
Matrix "Hatching"
16
 7 1
Fibonacci Poem
15
Toothpicks
38
 2 10
Ulam–Warburton Automaton
12
Ulam-Warburton Automaton Hex
39
 1 18
Count Morse
26
 6 5
Cut Into Squares
15
 6
Staircase
22
 2 3
Checking Perfect Power
12
The Cookie Monster
12
"Lunar" Multiply
9
 6
Rectangle Perimeter
3
Number With Exclamation
6
Longest Common Prefix
9
Count Divisibles in Range
6
Overlapping Disks
9
Find Remainder
6
Integer Sign Determination
3
Postfix Evaluation
9
 10
Collatz Ztalloc
9
 Ice Base
Roman Numerals
28
 608 2
Counting Tiles
25
 9 15
Feed Pigeons
16
 78 6
The Most Numbers
10
 767 1
How to Find Friends
32
 172 3
Oil Pie
35
 3 25
Monkey Typing
13
 217 3
Clock Angle
22
 62 1
Making Change
32
 17 3
Largest Rectangle in a Histogram
14
 55 4
Reverse Roman Numerals
28
 100 2
Long Repeat
8
 546
Identify Block
74
 3 13
Morse Encoder
16
 42 6
Find Quotes
8
Count Chains
30
Write Quadratic Equation
32
 2 11
Move Zeros
14
 20 2
One Switch Strings
9
Correct Capital
9
Interesting, intersecting
12
When "k" is Enough!
15
 30
Not in Order
9
 20
Is String a Number?
15
Is String a Number? (Part II)
15
Reveal the Number
9
 20
Close Enough
12
Leap Year Checking
9
Quadratic Equation Roots
9
Perfect Number Checking
9
Cleaning Robot
12
 4
Count And Say
12
 5 1
Colorful Disks
12
 3 4
Factorial Zeros
12
 Alice In Wonderland
Transposed Matrix
36
 74 4
The Shortest Knight's Path
30
 72
Multiplication Table
8
 151
Digits Doublets
22
 33 1
IP Network: Route Summarization
15
 68
Long Non Repeat
13
 49 3
The Fastest Horse
8
 5
When is Friday?
18
 22 8
Middle Characters
10
 93 1
Zigzag Array
16
 15 6
Swap Nodes
54
 6 13
Flood Area
59
 3 8
YAML. List and Comments
20
YAML. Complex Structure
30
Tree Walker
50
 5 9
Peaceable Queens
15
15-puzzle Solvability
16
 6 1
R-mahjong Ⅰ: break hand into sets
12
R-mahjong ⅠⅠ: is hand winning?
15
Bishop vs Aliens
12
 4
Dangerous Bishops
12
 3 1
 GitHub
Solution for Anything
28
 94 2
Open Labyrinth
48
 165 2
Area of a Convex Polygon
27
 54 1
The End of Other
7
 290 1
Painting Wall
20
 90
Shooting Range
8
 80
Xs and Os Champion
15
 29
Broken Clock
46
 9 6
The Most Frequent Weekdays
18
 25 8
Cookies
16
 17 6
Power Supply
40
 42
Merge Intervals
9
 61
Create Intervals
14
 39 4
Simplify Unix Path
58
 15 2
Long Repeat Inside
13
 28 3
Barcode Reader
43
 8 2
The Highest Building
13
 4 3
Paper Dice
47
 1 1
Create Intervals (iterator version)
9
Create Intervals (generator version)
9
Merge Intervals (iterator version)
9
Merge Intervals (generator version)
9
Expand Intervals
65
 2 29
The Cheapest Flight
15
 16 5
Evenly Spaced Trees
18
 34 1
Power Plants
51
 6 4
Searchlights
64
 5 5
 Dropbox
Speech Module
8
 872
The Best Number Ever
5
Three Points Circle
15
 206
Numbers Factory
8
 340
URL Normalization
20
 50
Hubspot Amulet
33
 12 2
Humpty Dumpty Form
22
 122 1
Friendly Number
32
 9 22
Simple Hashlib
9
 87 2
Place Queens
22
 13 1
The Longest Palindromic
25
 25 15
Nonogram Row
30
 1
Worth of Words
20
 2 13
Text Formatting
25
 3 15
On the same path
32
 14 3
Atbash Cipher
19
 4 12
Scytale Encryption
13
 14 3
Rotating Grille Cipher
47
 2 3
Grille Cipher Attack
60
Common Tail
9
Sort Sorted Groups
15
 11
Calculator-I
15
Calculator-II
15
Huffman Encode
15
 13
Calculator-IV
15
Calculator-V
15
Count Squares
22
 3 3
Sum of Distinct Cubes
12
The Longest Word
8
 23
All Permutations
9
Sum of Integers
9
Reverse Integer
9
Armstrong Number Checking
9
Maximum Among Three
6
Count Divisibles in Range (simplified)
6
Tricky String
14
 10 2
Revorse the vewels
0
 6
Frogs Collision
9
 PyCon TW
House Password
10
 1296 1
Building Visibility
8
 111
Calculate Islands
15
 139
How Much Gold
28
 24 2
Express Delivery
105
 9 4
Golden Pyramid
18
 32 8
Simple Areas
8
 334
Network Attack
15
 15 5
Digit Stack
10
 180 1
Robot Sort
25
 3 15
Dark Labyrinth
20
 17
Unfair Districts
37
 9 1
Double Substring
12
 72 2
Ryerson Letter Grade
29
 2 22
Sum Consecutives
15
 16 5
Fused Cubes
60
OOP 1: First Look at Class and Object
5
OOP 2: Class Attributes
5
OOP 3: Initializing
5
OOP 4: Adding Methods
5
OOP 5: Parent - Child
5
OOP 6: Overriding Methods
5
OOP 7: Adding Parameters
5
 Storage
Skew-symmetric Matrix
5
 396
Digging a Canal
20
 45
Haunted House
20
The Rows of Cakes
15
 89
Saw the Stick
13
 43 3
Restricted Prime
16
 12 6
Word Pattern
5
 164
Battle Dice
30
 9
Square Spiral
28
 23 2
Weak Point
5
 464
Mind Switcher
59
 11 4
Exec Quine
20
 41
Playfair Cipher
43
 4 7
Moria Doors
15
 210
Earth Distances
28
 15 2
English to Braille Translator
15
 53
Forgetful Prisoner
33
 3 2
Hexagon Spiral
20
 26
Group Equal consecutive
8
List Beautify
12
 14
Working Hours Calculator
15
Work Schedule Generator
15
Schedule Mode Builder
15
 4
Convert Date
9
 Maya
Net Game
15
Inertia
8
Light Up
15
Signpost
49
 1 13
Visibilities
20
Unruly
8
 1
Find Rectangles
20
 1
Train Tracks
40
House of Mirrors
40
 HubSpot
Restricted Sum
14
 144 7
Auto Painting
28
 25 2
Number Base
28
 428 2
The Hamming Distance
8
 744
Expected Dice
20
 26
Repeating Decimals
12
 1 2
Supply Stations
20
 8
Node Disconnected Users
44
 13 5
New Cities
15
 57
City's Happiness
27
 23 1
Supply Line
99
 6 7
Square Board
23
 9 5
Inscribe a Contour
20
Univocalic davasaan
5
 4
Non Empty Lines
19
 4 12
Team Play
58
 1 37
Workout
15
 16
Triangular Islands
40
Weekly Calendar
58
 2 7
Next Birthday
32
 12 3
 Blizzard
Radiation Search
22
 36 1
Stair Steps
17
 17 7
Spaceship Landing Strip
28
 21 2
The Angles of a Triangle
8
 627
Weekend Counter
14
 34 4
Sudoku Solver
36
 8 4
Palindromic Palindrome
30
 91
Min and Max
10
 407 1
Safe Coasts
33
 24 2
Unlucky Days
10
 71 3
String Conversion
32
 6 3
Stressful Subject
10
 213 1
The First Working Day
12
 14 5
Rectangles Union
17
 12 7
Useless Flights
56
 1 15
Permutation Index
56
 4 6
Reversed Permutation Index
60
 2 9
Connect Stars
50
Mountain Scape
6
Checkers Capture
12
 8
 Rock
Water Jars
28
 9 2
CheckSum
7
 44 1
Web Log Sessions
15
 76
Super Root
8
 193
Berserk Rook
20
 68
Crossword Solver
20
 22
Chicken Hunt
20
 12
Life Counter
59
 10 4
Family Gifts
30
 8
Parity Bit Generator
14
 22 4
Black Holes
27
 11 1
Most Efficient Cutting
21
 2 11
Hexagonal Islands
40
 11
River Crossing
60
Family Dinner
27
 5 3
Home Coming
32
 3 5
Sort by Removing
44
 2 16
Count Comprehensions
25
 21
Park Benches
20
Greedy Number
44
 1 5
Fibonacci Spiral's End
12
Garland
12
 6
All Roads Lead to Rome!
0
 3
 Shelter
Ghosts Age
14
 88 4
Pattern Recognition
14
 13 4
One line Drawing
22
 22 1
The Lantern Festival
27
 6 1
AMSCO Cipher
63
 3 22
ADFGVX Cipher
46
 6 6
Climbing Route
54
 2 5
Completely Empty
20
 80
The Nearest Square Number
21
 6 11
Seven Segment
68
 4 17
Fortress Cannons
40
Delivery Drone
40
 12
Landing Site
47
 11 1
Halloween Monsters
43
 23 2
Four To The Floor
8
 Codeship
The Square Chest
13
 49 3
8 Puzzle
48
 11 2
Snake Lite
73
 1 9
Minesweeper
33
 11 2
Bats Bunker
71
 3 8
Pearls in the Box
22
 116 1
Unfair Dice
41
 10 4
Behind 2048
20
 48
Probably Dice
30
 130
Magic Domino
20
 17
The 88th Puzzle
48
 3 7
Texas Referee
54
 10 3
Eaten Go Stones
45
 2 9
The Territory of Go
39
 3 5
Magic with 5 cards
30
Ugly Numbers
20
Reversi: Othello Moves
15
 3
Rolling 🎲!
29
 1 8
Champernowne Word
12
 Hermit
Anagrams By Stacks
75
 11 1
Ore In The Desert
60
 155
The Good Radix
10
 57 1
Colder-Warmer
76
 2 12
Reverse Engineer
60
 8
Mono Captcha
49
 3 13
Keywords Finder
15
 42
Simplification
60
 23
Break Rings
60
 129
Network Loops
28
 17 2
Strawberry Fields
42
 4 7
Fractions Addition
62
 1 26
Count Consecutive Summers
28
 89 2
Stacking Cubes
40
Shorter Set
7
 23 1
Birthday Party
7
 8 1
Stock Profit
4
 12 2
Excel Column Number
0
 17
Unique Email Addresses
9
Backspace Apply
9
 1
 Watchtower
Funny Addition
11
 144 4
Convex Hull
39
 5 5
Magic Square
15
 63
Number Guess
14
 5 4
Numbered Triangles
20
 52
Bulls and Cows
33
 12 2
Rotate Hole
8
 214
Bag of Santa Claus
8
Vigenere Cipher
10
 36 1
DNA Common Sequence
25
 28
Bacteria Colonies
27
 17 1
Compare Functions
13
 14 3
Ethernet Ring Dimensioning
36
 7 4
Wall Keeper
37
 16 1
Broken Window
78
 3 2
Boundary Blocks
60
 8
Stepping Stones Puzzle
15
 Escher
The Ship Teams
22
 11 12
Ground for the House
22
 6 1
Compass, Map and Spyglass
52
 2 42
The Stone Wall
18
 6
Wild Dogs
15
The Secret Room
14
 17 4
Keys and Locks
22
 6 1
Safe Code
8
 52
Treasures
8
The Stones
32
 24 3
Card Game
19
 6 9
The Buttons
15
 24
Graphical Key
33
 1 2
Hypercube
15
The Tower
20
 18
 Not On Map
Welcome Email by SendGrid
5
SendGrid Spam Reports
40
SendGrid Geo Stats
5
Most Wanted Letter
0
Base change - Position System
0
 5
Aggregate and Count
15
 4
Length of the String
5