[LeetCode]Medium - Cutting Ribbons - python

class Solution:
    def maxLength(self, ribbons: List[int], k: int) -> int:
        def possible(size):
            num_rib = 0
            for rib in ribbons:
                num_rib += rib // size
            return num_rib
        
        left = 1
        right = max(ribbons)
        res = 0
        
        while left <= right:
            mid = (left + right) // 2
            if possible(mid) < k :
                right = mid - 1
            else:
                res = mid
                left = mid + 1
        return res