标签:style blog color io for cti
Follow up for "Search in Rotated Sorted Array":
What if duplicates are allowed?
Would this affect the run-time complexity? How and why?
Write a function to determine if a given target is in the array.
题解:如果没有重复的元素,那么就可以根据target是否在某一半而扔掉另外一半。但是如果有重复的元素,就有可能不知道往哪边跳转:
例如A = {1,3,3,3,3,3},经过变换后得到数组{3,1,3,3,3,3},此时A[mid] = 3 = A[left] = A[right],如果target = 1,两边都不能扔,所以不能用二分的方法。
直接用遍历O(n)的方法也可以AC:
1 public class Solution { 2 public boolean search(int[] A, int target) { 3 if(A == null || A.length == 0) 4 return false; 5 for(int i = 0;i < A.length;i++) 6 if(target == A[i]) 7 return true; 8 return false; 9 } 10 }
【leetcode刷题笔记】Search in Rotated Sorted Array II,布布扣,bubuko.com
【leetcode刷题笔记】Search in Rotated Sorted Array II
标签:style blog color io for cti
原文地址:http://www.cnblogs.com/sunshineatnoon/p/3857995.html