Python

Reading strings

We can read a single line string using the built-in functions input():

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a_line_read = input()

Reading an array of integers

When you need to read an array of integers, you have to read the entire line, split it and the convert each element to an int:

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a_list_of_nums = map(int, input().split())

Reading n rows made up of a single integer

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for n in range(10):
    single_int = map(int, input())

Writing on STDOUT

When you need to write on stdout use:

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print("some text", file=sys.stdout)

Faster collections

Some exercices are skewed towards languages with very low overhead in handling collections of integers. For these kind of exercises using a list to hold data may not cut it. A faster alternative with lower overhead but the same nice ergonomics is provided by the array module.

For example to store a collections of unsigned integers and append to it one element:

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from array import array

a = array('I', [1, 2, 3, 4, 5])
a.append(6)
print(a, len(a))

Check out the reference documentation at: https://docs.python.org/3/library/array.html