ludek.reif profile - python coding challenges

Lambda function

Multiply (Intro)

lambda

9

1

Split it

First Word (simplified)

split

str

7

Substrings with one line if-else

Correct Sentence

upper

inline-if

str

5

2

The most common (Counter)

The Most Frequent

collections.Counter

Counter

collections

1

Simple solution

Between Markers (simplified)

index

str

3

Counter is your friend

All the Same

Any

typing.Any

collections.Counter

Counter

collections

2

Step by step

Sun Angle

inline-if

split

comprehension

int

15

12

1

First

Three Words

isalpha

inline-if

False

True

list-comp

3

Convert to int

Pawn Brotherhood

index

set

or

sorted

in

2

f like format

Date and Time Converter

calendar.month_name

month_name

calendar

f-string

inline-if

7

find begin and end

Between Markers

find

inline-if

str

len

7

3

Counter and chain

Sort Array by Element Frequency

from_iterable

itertools.from_iterable

chain

itertools.chain

collections.Counter

reverse sorted with key

Bigger Price

lambda

sorted

True

list

int

5

Comprehension and Expect

Even the Last

IndexError

except

try

sum

list-comp

9

Counter is your friend

Popular Words

collections.Counter

Counter

dict-comp

dict

collections

4

Step by step

Morse Decoder

upper

join

append

split

comprehension

2

1

One line

Right to Left

replace

join

4

any in action

Three Words

any

isalpha

join

False

and

minimalist

Pawn Brotherhood

index

set

or

sorted

if-comprehension

3

One line

Even the Last

lambda

inline-if

sum

list-comp

comprehension

3

Clear vs. Speedy

Non-unique Elements

collections.Counter

Counter

collections

if-comprehension

list-comp

5

2

find two times

Second Index

find

None

inline-if

int

str

1

2

Simple solution with except

Even the Last

IndexError

except

try

for

1

replace first, replace second, strip and split it

First Word

rstrip

replace

split

str

4

Straightforward

Days Between

datetime.datetime

datetime

abs

First

Non-unique Elements

count

append

for

if

2

Magic constants

Find Sequence

enumerate

abs

join

in

False

IF solution

Boolean Algebra

None

or

elif

and

else

4

Simple solution with except and ord

Brackets

ord

IndexError

pop

except

try

3

Simple one line solution

Verify Anagrams

lower

sorted

if-comprehension

list-comp

comprehension

1

reduce with lambda

Digits Multiplication

functools.reduce

reduce

functools

lambda

if-comprehension

1

Replace 00 to 24 and test it

Time Converter (24h to 12h)

f-string

replace

inline-if

split

int

5

8

Random

I Love Python!

random.choice

choice

random

join

while

6

17

One line

Conversion from CamelCase

isupper

enumerate

lower

inline-if

join

17

2

Simple solution

Letter Queue

startswith

pop

join

elif

and

6

Commented

Cipher Map

enumerate

abs

sorted

join

if-comprehension

5

One line

Common Words

lambda

sorted

join

if-comprehension

in

11

zip it

The Hidden Word

itertools.zip_longest

zip_longest

itertools

find

enumerate

3

defaultdict is the right way

Call to Home

collections.defaultdict

defaultdict

values

collections

inline-if

2

Simple solution

Bird Language

replace

in

elif

False

and

8

1

defaultdict in action

The Most Wanted Letter

ascii_letters

string.ascii_letters

collections.defaultdict

defaultdict

keys

Simple solution

Pangram

ascii_lowercase

string.ascii_lowercase

string

lower

False

5

One line

Secret Message

isupper

join

if-comprehension

list-comp

comprehension

6

Alternating

Striped Words

upper

not

inline-if

sum

join

2

Sorted

Absolute Sorting

abs

lambda

sorted

5

Co

Common Words

sorted

join

if-comprehension

in

split

3

2

First solution

Morse Clock

bin

enumerate

replace

isdigit

join

Recursion

Flatten a List

type

append

list

else

for

5

2

Condition and modulo

Time Converter (12h to 24h)

f-string

replace

or

and

split

Except is here

Index Power

IndexError

except

try

4

O(n^2)

Count Inversions

enumerate

for

if

Just solution

Xs and Os Referee

abs

or

in

elif

range

First

Median

sorted

len

if

@property and inner take_hit()

The Warriors

class

property

super

decorator

not

11

20

1

Turn it

Multicolored Lamp

class

len

6

2

Just solution

Friends

class

tuple

set

if-comprehension

in

1

S

Building Base

locals

class

format

1

max with key

Best Stock

max

lambda

18

14

Math is really cool thing

Achilles and the Tortoise

1

Euclidean algorithm & reduce

The Greatest Common Divisor

functools.reduce

reduce

functools

while

1

Clear case

Cut Sentence

rsplit

f-string

in

elif

else

More variables for better understanding

Caesar Cipher (encryptor)

string.find

ascii_lowercase

string.ascii_lowercase

string

find

Comprehension

Binary Count

bin

sum

comprehension

int

str

1

Just s

Fizz Buzz

elif

and

str

if

1

First

Moore Neighbourhood

pass

enumerate

abs

elif

and

One line

Morse Encoder

lower

inline-if

join

comprehension

5

While there is food

Feed Pigeons

while

else

if

3

2

Use the table

Roman Numerals

continue

sorted

True

for

if

7

Simple solution

Monkey Typing

lower

in

for

if

2

Readable

Reverse Roman Numerals

index

range

else

len

for

Simplest, but not the most optimal

Largest Rectangle in a Histogram

tuple

min

max

range

len

We need go deeper

How to Find Friends

collections.defaultdict

defaultdict

as

tuple

collections

Inner function

Roman Numerals

enumerate

elif

append

else

int

2

MIN and MAX

The Most Numbers

TypeError

min

except

try

max

1

Simple and clear

Middle Characters

else

len

if

1

Simple solution with enumerate

Transposed Matrix

enumerate

append

else

for

if

2

Check all

Long Non Repeat

enumerate

break

range

else

len

Clear solution

The Most Frequent Weekdays

datetime.datetime

datetime

sorted

list-comp

comprehension

17

11

Reverse

The End of Other

re.search

search

re

sorted

False

Straightforward

Solution for Anything

class

object

True

Still set

Create Intervals

min

max

not

in

elif

Crazy solution...

Three Points Circle

locals

class

math.sqrt

sqrt

format

11

1

Comprehension

Worth of Words

dict-comp

max

lambda

sum

comprehension

13

1

Simple solution

Speech Module

pass

join

elif

append

else

11

Clear and speedy solution

The Longest Palindromic

enumerate

break

while

and

else

With Counter

Numbers Factory

collections.Counter

Counter

collections

break

not

Hello math, my old friend

Humpty Dumpty Form

math.atanh

atanh

math.asin

asin

math.pi

0**2

The Best Number Ever

Simple solution

Digit Stack

pop

elif

append

split

int

1

Everything's TRUE

House Password

islower

all

isupper

isdigit

elif

7

8

alterisk

Simple Areas

math.pi

pi

math.sqrt

sqrt

round

First solution

Moria Doors

punctuation

string.punctuation

itemgetter

operator.itemgetter

collections.defaultdict

Column to defautdict

Weak Point

collections.defaultdict

defaultdict

as

items

collections

Short solution

The Hamming Distance

bin

lambda

count

10

Sim

Number Base

ValueError

except

try

int

9

Split it and join

Restricted Sum

eval

lambda

join

split

str

Recursion

Restricted Sum

not

lambda

inline-if

len

4

In order

Stressful Subject

ascii_lowercase

string.ascii_lowercase

strip

string

isupper

2

While with timedelta

Weekend Counter

datetime.timedelta

timedelta

datetime

while

in

Simple solution

Min and Max

TypeError

is

get

None

except

1

Inner function

The Angles of a Triangle

math.degrees

degrees

math.acos

acos

round

There and back

The Nearest Square Number

math.sqrt

sqrt

round

math

16

5

Ok, it's scary...

Ghosts Age

fsum

math.fsum

tuple

math

while

Simple solution

Pearls in the Box

round

count

and

append

range

1

Divide the number

Count Consecutive Summers

break

range

for

if

4

Predict the key

Vigenere Cipher

ascii_uppercase

string.ascii_uppercase

string

enumerate

index

2

No sense for humor :)

Funny Addition

lambda

sum

6

break and continue

Rotate Hole

continue

break

not

False

append

Minus is the key

The Stone Wall

collections.defaultdict

defaultdict

collections

enumerate

max

3

Find the borders

Ground for the House

is

find

enumerate

min

None

4

1

divmod and index

The Secret Room

divmod

f-string

index

lambda

sorted

Comprehension

The Ship Teams

sorted

if-comprehension

list-comp

comprehension

3

Use math they said

Wild Dogs

ZeroDivisionError

combinations

itertools.combinations

collections.defaultdict

defaultdict

How far

Compass, Map and Spyglass

all

enumerate

None

abs

max