/*

Author: Andy, nkuwjg@gmail.com

Date: Oct 22, 2014

Problem: Find Minimum in Rotated Sorted Array

Difficulty: Medium

Source: https://oj.leetcode.com/problems/find-minimum-in-rotated-sorted-array/

Notes:

Suppose a sorted array is rotated at some pivot unknown to you beforehand.

(i.e., 0 1 2 4 5 6 7 might become 4 5 6 7 0 1 2).

Find the minimum element.

You may assume no duplicate exists in the array.

*/

public class Solution {

public int findMin(int[] num) {

if (num.length == 0) return 0;

int left = 0, right = num.length -1;

while (left < right && num[left] > num[right]) {

int mid = left + (right - left) / 2;

if (num[mid] > num[right]) left = mid + 1;

else right = mid;

}

return num[left];

}

}