LC-1250 Hard LeetCode

1250. Check If It Is a Good Array

Read the full problem statement on LeetCode.

Difficulty: hard Acceptance: 61% Topics: Array, Math, Number Theory

Reading material

Arrays & Hashing 12 min Math & Geometry 12 min

Reference solution (spoiler · python)

# Time:  O(n)
# Space: O(1)

class Solution(object):
    def isGoodArray(self, nums):
        """
        :type nums: List[int]
        :rtype: bool
        """
        def gcd(a, b):
            while b:
                a, b = b, a%b
            return a

        # Bézout's identity
        result = nums[0]
        for num in nums:
            result = gcd(result, num)
            if result == 1:
                break
        return result == 1

Solution from kamyu104/LeetCode-Solutions · MIT