32
Last seen 2 months ago
Member for 10 years, 1 month, 10 days
Difficulty Normal
Theoretical physicist
Initiation
textwrap
Split Pairs
2
202
8
First
Backward String
24
3
1
First
Number Length
29
1
0
First
Nearest Value
34
0
0
First
Acceptable Password I
38
0
0
First
End Zeros
42
0
0
First
Beginning Zeros
75
0
0
First
Easy Unpack
84
0
0
First
Between Markers (simplified)
88
0
0
First
First Word (simplified)
92
0
0
First
All the Same
136
0
0
First
Sum Numbers
235
3
0
First
Correct Sentence
246
0
0
divmod max
Max Digit
337
2
0
First
Count Digits
396
1
0
First
Replace First
466
1
0
First
Remove All Before
537
0
0
collections.Counter
The Most Frequent
592
0
0
Home
First
Changing direction
10
0
0
First
Duplicate Zeros
19
0
0
First
Backward Each Word
27
0
0
First
Sort Array by Element Frequency
31
14
0
First
Sun Angle
79
0
0
f-strings
Date and Time Converter
81
5
0
First
Between Markers
223
0
0
try index except None
Second Index
289
3
0
First
Morse Decoder
430
0
0
regex
First Word
445
2
0
First
Bigger Price
516
2
1
collections.Counter, regex
Popular Words
540
1
1
First
Pawn Brotherhood
1351
0
0
First
Days Between
1421
0
0
First
Right to Left
2025
0
0
First
Three Words
2996
0
0
First
Even the Last
4036
0
0
First
Non-unique Elements
6073
0
0
Electronic Station
First
Unix Match. Part 2
7
0
0
translate from fnmatch
Unix Match. Part 1
9
1
0
First
Similar Triangles
21
0
0
First
Ascending List
22
0
0
First
All Upper II
22
0
0
First
Can You Pass?
24
4
1
First
Find Sequence
30
1
1
First
Acceptable Password II
39
6
1
First
Sort by Extension
41
0
0
bfs
Remove Brackets
43
0
2
First
Inside Block
62
0
0
First
Words Order
64
0
0
First
Acceptable Password IV
71
0
0
First
Acceptable Password III
72
0
0
First
Acceptable Password V
190
0
0
First
Surjection Strings
229
0
0
First
Verify Anagrams
1358
0
0
First
Brackets
1571
0
0
First
Boolean Algebra
1785
0
0
First
Digits Multiplication
2705
0
0
Scientific Expedition
First
YAML. More Types
2
5
0
First
Convert and Aggregate
3
0
0
First
Caps Lock
12
0
0
First
YAML. Simple Dict
13
0
0
filter
Sum by Type
17
0
0
First
Morse Clock
19
4
1
First
Cipher Map
30
2
0
First
Conversion into CamelCase
38
0
0
First
Goes Right After
38
0
0
First
Time Converter (24h to 12h)
59
0
0
First
Striped Words
61
2
0
First
Remove Accents
91
0
0
First
Common Words
96
2
1
First
The Hidden Word
141
1
0
collections.Counter
Follow Instructions
198
2
0
First
Call to Home
301
0
0
one for and append to list
Conversion from CamelCase
324
0
0
First
Bird Language
448
0
0
First
Letter Queue
1038
0
0
First
Pangram
1266
0
0
First
Absolute Sorting
1922
0
0
First
Secret Message
2723
0
0
First
The Most Wanted Letter
4167
0
0
O'Reilly
First
Integer Palindrome
3
0
1
First
The Flat Dictionary
7
0
0
First
The Final Stone
7
0
0
Second-DFS
The Flat Dictionary
8
14
0
First
Chunk
11
0
0
itertools.permutations
Cipher Crossword
12
3
0
First
Median of Three
12
0
0
First
Sort Except Zero
16
0
0
First
Majority
30
0
0
First
Time Converter (12h to 24h)
31
0
0
total_seconds
Lightbulb Intro
39
0
0
to str and count max open [(
How Deep
42
4
0
First
Replace Last
72
0
0
First
Determine the Order
131
0
0
stack
Reverse Every Ascending
135
0
3
functools.cmp_to_key
Frequency Sorting
194
1
1
First
Remove All After
251
0
0
First
Compress List
386
0
0
First
Flatten a List
493
0
0
First
Loading Cargo
1522
0
0
First
Count Inversions
1599
0
0
Second
Count Inversions
2113
0
0
First
Index Power
3211
0
0
First
Xs and Os Referee
3216
0
0
First
Median
6687
0
0
Incinerator
First
Geometry Figures
3
0
1
First
3 Chefs
3
0
0
First
Army Units
4
0
0
First
The Defenders
5
14
1
First
Army Battles
5
6
1
First
Capital City
6
0
0
First
Every Person is Unique
7
0
0
First
Party Invitations
15
0
0
First
Text Editor
26
0
0
First
Voice TV Control
27
0
0
First
Dialogues
30
0
0
First
Microwave Ovens
31
0
0
First
Multicolored Lamp
39
0
0
First
Hacker Language
41
0
0
First
The Vampires
49
0
0
First
The Warriors
90
0
0
First
Friends
771
0
0
First
Building Base
931
0
0
Mine
np.dot
Can Balance
3
0
0
First
Aggregate by Operation
3
0
0
First
Chess Knight
4
0
0
functools.cmp_to_key
Bigger Together
7
20
0
First
Escape
8
0
0
recursive
Domino Chain
16
0
0
First
Caesar Cipher (decryptor)
20
3
0
np.linalg.det
Determinant
32
0
0
First
Cut Sentence
38
0
0
First
The Greatest Common Divisor
50
5
1
First
Currency Style
53
0
0
Second
Currency Style
54
0
0
First
The Einstein Problem-Lite
60
0
0
First
Color Map
72
0
0
First
What Is Wrong With This Family?
108
0
0
First
Best Stock
127
5
0
First
Achilles and the Tortoise
259
0
0
First
Caesar Cipher (encryptor)
436
0
1
First, dfs recursion
Disposable Teleports
452
0
0
First
Binary Count
2061
0
0
First
Moore Neighbourhood
2382
0
0
Second
Binary Count
2731
0
0
First
Fizz Buzz
3990
0
0
Ice Base
scipy connected_components, not elementary mission
Count Chains
1
3
0
Sort and number difference
Identify Block
39
0
3
regular expr
Find Quotes
58
5
1
First
Making Change
67
0
0
First
Long Repeat
105
0
0
First
Counting Tiles
157
0
0
simple O(N^2) bf all subrectangles
Largest Rectangle in a Histogram
158
1
0
First
Morse Encoder
206
0
0
import fractions
Oil Pie
215
0
0
string.replace
Reverse Roman Numerals
253
0
0
First
Clock Angle
327
0
0
First
How to Find Friends
1092
0
0
First
Feed Pigeons
2026
0
0
First
Roman Numerals
2336
0
0
First
Monkey Typing
2661
0
2
First
The Most Numbers
2748
0
0
Alice In Wonderland
First
Swap Nodes
2
0
0
First
When is Friday?
8
18
0
recursion
Tree Walker
9
0
0
First
Zigzag Array
10
0
0
First
The Fastest Horse
20
0
0
First
Middle Characters
29
0
0
simple O(N^2)
Long Non Repeat
34
0
0
First
Digits Doublets
35
1
2
defaultdict, BFS
The Shortest Knight's Path
96
0
0
First
IP Network: Route Summarization
137
0
0
First
Multiplication Table
166
0
0
First
Transposed Matrix
1666
0
0
GitHub
from scipy.sparse.csgraph import dijkstra
The Cheapest Flight
1
3
2
numpy sol
Evenly Spaced Trees
3
0
0
First
The Highest Building
6
0
0
First
Barcode Reader
6
0
0
First
Searchlights
6
0
0
First, cropped normpath from os.path
Simplify Unix Path
17
0
0
First
Merge Intervals
19
0
0
First
Cookies
27
0
0
First
Create Intervals
31
0
0
Second
Cookies
33
0
0
simple brute force
Xs and Os Champion
35
0
0
dfs
Power Supply
38
0
0
One-line (itertools.chain.from_iterable)
Expand Intervals
42
4
1
bruteforce
Long Repeat Inside
68
0
0
First
The Most Frequent Weekdays
80
0
0
First
Shooting Range
89
0
0
datetime, re
Broken Clock
114
0
0
merge intervals
Painting Wall
121
0
0
First
Area of a Convex Polygon
219
0
0
First
Solution for Anything
595
0
0
First
Open Labyrinth
1515
0
0
First
The End of Other
2038
0
0
Dropbox
First
Text Formatting
1
1
1
First
Nonogram Row
4
0
0
numpy dot
Hubspot Amulet
7
2
1
all_paths
On the same path
9
0
0
First
URL Normalization
55
0
0
First
Place Queens
61
0
0
First
Worth of Words
116
2
0
First
Simple Hashlib
190
0
0
First
Humpty Dumpty Form
331
0
0
First
Three Points Circle
375
0
0
First
The Longest Palindromic
452
0
0
First
Numbers Factory
766
0
0
First
Speech Module
4938
0
0
PyCon TW
precalculate dict
Ryerson Letter Grade
2
0
0
sympy
How Much Gold
8
0
0
First
Double Substring
13
0
0
First
Network Attack
13
0
0
path = bfs(player, 'E') or bfs(player, '?') or bfs(player, border)
Dark Labyrinth
21
0
0
groupby, yield
Sum Consecutives
66
0
0
First
Golden Pyramid
112
3
0
min [BFS(S->B1)+BFS(E->B2)+BFS(B1->B2), BFS(S,E)]
Express Delivery
123
0
0
First
Robot Sort
255
0
0
stack
Calculate Islands
318
0
0
First
Simple Areas
557
0
0
First
Digit Stack
851
0
0
Second
Digit Stack
1070
0
0
First
House Password
7877
0
0
Second
House Password
9293
0
0
Storage
First
Playfair Cipher
11
1
0
groupby
Group Equal consecutive
42
5
1
First
English to Braille Translator
75
0
0
haversine formula
Earth Distances
92
0
0
First
The Rows of Cakes
133
0
0
First
Restricted Prime
222
0
0
First
Saw the Stick
239
0
0
First
Moria Doors
309
0
0
First
Word Pattern
325
0
0
First
Skew-symmetric Matrix
672
0
0
First
Weak Point
818
0
0
Maya
bfs (restart graph), hard mission
Inertia
1
0
0
HubSpot
First
Triangular Islands
3
0
0
brute force without binary search
Workout
9
1
1
First
Non Empty Lines
15
0
0
First
Square Board
16
4
1
First
City's Happiness
25
0
0
Greedy
Team Play
27
0
0
First
New Cities
37
0
0
First
Node Disconnected Users
43
0
0
regex & decimal form
Repeating Decimals
109
0
0
First
Auto Painting
189
0
0
First
The Hamming Distance
1189
0
0
First
Restricted Sum
1265
0
0
First
Number Base
1787
0
0
Blizzard
from scipy.sparse.csgraph import dijkstra again
Useless Flights
1
3
0
scipy.sparse.csgraph
Connect Stars
5
0
0
datetime, isoweekday, timedelta
The First Working Day
7
0
0
First
String Conversion
12
0
0
First
Unlucky Days
42
0
0
count grid units
Rectangles Union
46
1
1
Fill recursive
Safe Coasts
87
0
0
backtrack
Sudoku Solver
88
0
0
flood fill with stack
Radiation Search
136
0
1
Dyn Prog
Stair Steps
325
0
0
First
Stressful Subject
459
0
1
First
Spaceship Landing Strip
460
0
0
First
Min and Max
822
0
0
First
Weekend Counter
997
0
0
First
The Angles of a Triangle
1033
0
0
Rock
First
Home Coming
3
0
0
First
Most Efficient Cutting
4
0
0
First
Crossword Solver
37
0
0
First
Sort by Removing
41
1
0
BFS
Water Jars
50
0
1
First
Parity Bit Generator
56
1
0
First
CheckSum
98
0
1
DFS
Berserk Rook
100
0
0
First
Super Root
173
0
0
Shelter
First
Four To The Floor
2
3
0
Counter, combinations_with_replacement
Halloween Monsters
3
0
0
First
Completely Empty
7
2
1
First
The Nearest Square Number
7
0
0
right hand fill
The Lantern Festival
44
0
0
First
One line Drawing
74
0
0
First
AMSCO Cipher
96
0
0
First
ADFGVX Cipher
106
0
0
itertools, frozenset dict
Seven Segment
119
0
0
check all subrectangles
Pattern Recognition
297
0
0
First
Ghosts Age
943
0
0
Codeship
flood fill
Eaten Go Stones
3
0
0
flood fill, stack
The Territory of Go
3
0
0
from scipy.sparse.csgraph import shortest_path
Bats Bunker
4
0
0
First
Pearls in the Box
28
1
1
First
The 88th Puzzle
40
0
0
First
Behind 2048
108
0
0
DP@lru_cache
Probably Dice
126
0
0
Best-first search (heapq)
8 Puzzle
160
0
0
First
The Square Chest
602
0
0
Hermit
First
Strawberry Fields
2
0
0
First
Mono Captcha
7
0
0
brute force and random.choice
Ore In The Desert
10
5
1
First
Count Consecutive Summers
13
0
0
Fractions module
Fractions Addition
20
2
0
Power of 26
Excel Column Number
24
0
0
First
Network Loops
38
0
0
sympy_parser
Simplification
61
0
0
First
Colder-Warmer
72
0
0
First
Keywords Finder
77
0
0
First, BFS
Anagrams By Stacks
81
0
0
First
The Good Radix
361
0
0
Watchtower
check X neighbours regions
Boundary Blocks
2
0
0
First
Bag of Santa Claus
5
4
0
sieve
Bulls and Cows
7
4
0
First
Wall Keeper
11
0
0
scipy.spatial
Convex Hull
18
1
1
First
Bacteria Colonies
20
1
0
First
DNA Common Sequence
34
0
0
First
Compare Functions
62
0
0
Set sieve
Number Guess
67
0
0
First
Magic Square
68
0
0
DFS, itertools.permutations
Numbered Triangles
76
0
1
First
Vigenere Cipher
194
0
0
deque.rotate
Rotate Hole
380
0
0
First
Funny Addition
929
0
0
Escher
First
Wild Dogs
2
2
0
Dyn prog
The Stones
2
0
0
First
Card Game
2
0
0
First
Safe Code
3
0
0
bfs, slow
Graphical Key
3
0
0
First
The Tower
3
0
0
First
The Secret Room
4
0
0
First
Treasures
5
0
0
First
Compass, Map and Spyglass
8
0
0
First
Keys and Locks
8
0
0
Flood fill
The Buttons
16
1
0
First
Ground for the House
18
0
0
recursive flood fill
Hypercube
22
0
1
First
The Ship Teams
44
0
0
First
The Stone Wall
90
1
0