moonlightshadow123
4/10/2017 - 3:04 PM

374-Guess-Number-Higher-or-Lower https://leetcode.com/problems/guess-number-higher-or-lower/

374-Guess-Number-Higher-or-Lower https://leetcode.com/problems/guess-number-higher-or-lower/

bSearch.py
content_copyfile_download

# 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
        """
        high = n
        low = 1
        while high != low:
            mid = (high + low) / 2
            res = guess(mid)
            if res == -1:
                high = mid -1
            elif res == 1:
                low = mid + 1
            else:
                return mid
        return low
374-Guess-Number-Higher-or-Lower.md
content_copyfile_download
  • Rendered
  • Source

We are playing the Guess Game. The game is as follows:

I pick a number from 1 to n. You have to guess which number I picked.

Every time you guess wrong, I'll tell you whether the number is higher or lower.

You call a pre-defined API guess(int num) which returns 3 possible results (-1, 1, or 0):

-1 : My number is lower
 1 : My number is higher
 0 : Congrats! You got it!

Example:

n = 10, I pick 6.
Return 6.