6、旋转数组的最小数字

把一个数组最开始的若干个元素搬到数组的末尾，我们称之为数组的旋转。输入一个非递减排序的数组的一个旋转，输出旋转数组的最小元素。例如数组{3,4,5,1,2}为{1,2,3,4,5}的一个旋转，该数组的最小值为1。NOTE：给出的所有元素都大于0，若数组大小为0，请返回0。
===========Python============

# -*- coding:utf-8 -*-
class Solution:
    def minNumberInRotateArray(self, rotateArray):
        # write code here
        if len(rotateArray) == 0:
            return 0
        left = 0
        right = len(rotateArray) - 1
        while left + 1 < right:
            mid = left + ((right - left) >> 1)
            if rotateArray[left] < rotateArray[mid]:
                left = mid
            elif rotateArray[left] > rotateArray[mid]:
                right = mid
            else:
                left += 1
        return min(rotateArray[left], rotateArray[right])

==============Java=============

import java.util.ArrayList;
public class Solution {
    public int minNumberInRotateArray(int [] array) {
        int left = 0;
        int right = array.length - 1;
        while (left + 1 < right) {
            int mid = left + ((right - left) >> 1);
            if (array[mid] == array[left]) {
                left ++;
                continue;
            } else if (array[mid] > array[left]) {
                left = mid;
            } else {
                right = mid;
            }
        }
        return Math.min(array[left], array[right]);
    }
}