lintcode-medium-Find Minimum in Rotated Sorted Array
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.
public class Solution { /** * @param num: a rotated sorted array * @return: the minimum number in the array */ public int findMin(int[] num) { // write your code here if(num == null || num.length == 0) return 0; int left = 0; int right = num.length - 1; while(left < right - 1){ if(num[left] < num[right]) return num[left]; int mid = left + (right - left) / 2; if(num[left] < num[mid]) left = mid + 1; else right = mid; } return Math.min(num[left], num[right]); } }