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Challenge 241: FizzBuzz Validator

curriculum/challenges/english/blocks/daily-coding-challenges-python/69b58ce40693f140c84c855a.md

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--description--

Given an array of sequential integers, with multiples of 3 and 5 replaced, determine if it's a valid FizzBuzz sequence.

In a valid FizzBuzz sequence:

  • Multiples of 3 are replaced with "Fizz".
  • Multiples of 5 are replaced with "Buzz".
  • Multiples of both 3 and 5 are replaced with "FizzBuzz".
  • All other numbers remain as integers.

--hints--

is_fizz_buzz([1, 2, "Fizz", 4, "Buzz"]) should return True.

js
({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_fizz_buzz([1, 2, "Fizz", 4, "Buzz"]), True)`)
}})

is_fizz_buzz([13, 14, "FizzBuzz", 16, 17]) should return True.

js
({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_fizz_buzz([13, 14, "FizzBuzz", 16, 17]), True)`)
}})

is_fizz_buzz([1, 2, "Fizz", 4, 5]) should return False.

js
({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_fizz_buzz([1, 2, "Fizz", 4, 5]), False)`)
}})

is_fizz_buzz(["FizzBuzz", 16, 17, "Fizz", 19, "Buzz"]) should return True.

js
({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_fizz_buzz(["FizzBuzz", 16, 17, "Fizz", 19, "Buzz"]), True)`)
}})

is_fizz_buzz([1, 2, "Fizz", "Buzz", 5]) should return False.

js
({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_fizz_buzz([1, 2, "Fizz", "Buzz", 5]), False)`)
}})

is_fizz_buzz([97, 98, "Buzz", "Fizz", 101, "Fizz", 103]) should return False.

js
({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_fizz_buzz([97, 98, "Buzz", "Fizz", 101, "Fizz", 103]), False)`)
}})

is_fizz_buzz(["Fizz", "Buzz", 101, "Fizz", 103, 104, "FizzBuzz"]) should return True.

js
({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_fizz_buzz(["Fizz", "Buzz", 101, "Fizz", 103, 104, "FizzBuzz"]), True)`)
}})

--seed--

--seed-contents--

py
def is_fizz_buzz(arr):

    return arr

--solutions--

py
def is_fizz_buzz(arr):
    start = None
    for i, val in enumerate(arr):
        if isinstance(val, int):
            start = val - i
            break

    if start is None:
        return False

    for i in range(len(arr)):
        n = start + i
        if n % 15 == 0:
            expected = "FizzBuzz"
        elif n % 3 == 0:
            expected = "Fizz"
        elif n % 5 == 0:
            expected = "Buzz"
        else:
            expected = n
        if arr[i] != expected:
            return False

    return True