LeetCode374猜数字大小

原创于 2018-11-21 10:52:24 发布 · 146 阅读

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本文深入探讨了猜数字游戏的算法实现，通过定义一个Solution类并实现guessNumber方法，使用二分查找策略来高效地猜出指定范围内的目标数字。文章详细解释了左闭右闭区间内的二分查找过程，如何根据返回值调整搜索范围，直至找到正确答案。

# The guess API is already defined for you.
# @param num, your guess
# @return -1 if my number is lower, 1 if my number is higher, otherwise return 0
# def guess(num):

class Solution(object):
    def guessNumber(self, n):
        """
        :type n: int
        :rtype: int
        """
        left = 0
        right = n
        while (left <= right):
            mid = left + (right - left) // 2
            value = guess(mid)
            if (value == 1):
                left = mid + 1
            elif (value == -1):
                right = mid - 1
            else:
                return mid