Search in Rotated Sorted Array II
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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.
public class Solution { public boolean search(int[] nums, int target) { if(nums.length == 0 || nums == null){ return false; } int s = 0; int e = nums.length -1; int m = 0; while(s+1<e){ m = s + (e-s)/2; if(nums[m] == target){ return true; }else if(nums[s]<nums[m]){//左边全升序 if(nums[s]<=target&&target<=nums[m]){//t在s,m之间 e = m;//缩小范围 }else{ s = m;//去右边找 } }else if(nums[s] > nums[m]){//左边有转折点 if(nums[m]<=target&&target<=nums[e]){//t在m,e之间 s = m;//缩小范围 }else{ e = m;//去左边找 } }else{ s++; } } if(nums[s] == target){ return true; } if(nums[e] == target){ return true; } return false; } }
haha...
public class Solution { public boolean search(int[] nums, int target) { for (int i = 0; i < nums.length; i ++) { if (nums[i] == target) { return true; } } return false; } }
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