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!
Basic Binary Search Problem:
1 class Solution(object): 2 def guessNumber(self, n): 3 """ 4 :type n: int 5 :rtype: int 6 """ 7 low, high = 1, n 8 9 while low <= high: 10 mid = (low + high)//2 11 ans = guess(mid) 12 if ans == 1: 13 low = mid + 1 14 elif ans == -1: 15 high = mid - 1 16 else: 17 return mid
Leetcode 374. Guess Number Higher or Lower
原文：http://www.cnblogs.com/lettuan/p/6216568.html