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package leetcode.binarySearch;

public class leetcode33 {

public int search(int[] nums, int target) {

int left=0;

int right=nums.length-1;

int mid=(left+right)/2; //中点

while(left<=right){

if(nums[mid]==target){

return mid;

}

if(nums[left]<=nums[mid]) //右边升序

{

if(target>=nums[left]&& target<nums[mid]){

right=mid-1;

}

else{

left=mid+1; //只能从右边找

}

}else{ //左边升序

if(target>nums[mid]&& target<=nums[right]){

left=mid+1;

}else{

right=mid-1; //只能从左边找

}

}

mid=(left+right)/2;

}

return -1; //没找到

}

}