Write a programElementary20 XPExercise 11/15

Common elements of two lists

Task

The program generates two lists of 15 random whole numbers from ⟨1; 20⟩ and then a third list with the elements the first two share.

Split it into functions the tests call directly:

vygeneruj() returns a list of 15 random whole numbers from 1 to 20,
spolocne(a, b) returns a list of the values found in both lists, each only once, sorted in ascending order.

What the program should do

spolocne([1, 2, 3, 4], [3, 4, 5]) returns [3, 4].

Examples

Call

print(spolocne([1, 2, 3, 4], [3, 4, 5]))

Expected output

[3, 4]

Call

z = vygeneruj()
print(len(z) == 15, all(type(x) == int and 1 <= x <= 20 for x in z))
print(len({tuple(vygeneruj()) for _ in range(20)}) > 1)

Expected output

True True
True

After you submit, 3 hidden tests will also check your solution: repeated values, nothing in common, sorting the result.

Python starts the first time you run code.

import random
def vygeneruj():
    pass
def spolocne(a, b):
    pass
if __name__ == "__main__":
    a = vygeneruj()
    b = vygeneruj()
    print(a)
    print(b)
    print(spolocne(a, b))

Ctrl+Enter runs the program. Tab indents. Press Esc, then Tab, to leave the editor.

Input (stdin)

Each line = one call to input().

Output

Hints

Try it yourself first. Each hint reveals a little more - and lowers the reward a little.

Signed out, hints are free - but no XP is awarded either.

Solution

The solution unlocks after the last hint.