Introduction to Python

Profound Academy

Course Status
1
Input and Output
2
Mastering I/O
3
Variables and Integer Arithmetic
4
Mastering Variables
5
Conditional Operators
6
More on Boolean Variables
7
Advanced Conditions - Nesting
8
Mastering Conditions
9
Types and Variables
10
Mastering types
11
Strings
12
More Strings
13
Lists and ranges
14
Mastering Lists and ranges
15
For Loops
16
Mastering For loops
17
While Loops
18
continue, break, while...else, for...else
19
String and List methods
20
Nested Loops
21
Mastering Loops
22
List Comprehension
23
Advanced loops
24
Tuples and Sets
25
dict
26
Functions
27
Functions 2
28
Lambda and higher-order functions
29
Files

Chessboard

Given two integers h and w, you are asked to paint a chessboard of height h and width w.

The input contains two integers h and w separated by a space.

The program should print h rows, which have w symbols. The black cells need to be marked with # and white cells need to be marked with ..

Input	Output
3 4	.#.# #.#. .#.#

Can you implement this in a single line of code 😎?

Constraints

Time limit: 2 seconds

Memory limit: 512 MB

Output limit: 1 MB

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