Implement Look-and-Say

MediumPython

Problem

See-and-say (look-and-say) problem.

Asked in the onsite round 1 stage. Implement a function that returns the nth term of the look-and-say sequence, starting with "1". Each next term describes consecutive digit runs in the previous term.

Contract

n is an integer. Return the nth term as a string.

Constraints

1 <= n <= 30
The sequence starts with the term "1"
Return the result as a string containing only decimal digits

Function Signature

def count_and_say(n):

CodePython 3

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Run your code to see test output here.