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旋转数组中的二分查找

时间:2019-09-04 22:35:22      阅读:88      评论:0      收藏:0      [点我收藏+]

 

 

class Solution {
public:
    int search(vector<int>& nums, int target) {
        if(nums.size() == 0) return -1;
        
        int low = 0, high = nums.size()-1, mid;
        while(low+1 < high)
        {
            mid = (high - low)/2 + low;
            if(nums[mid] == target)
                return mid;
            if(nums[low] < nums[mid])
            {
                if(nums[low] <= target && target <= nums[mid])
                    high = mid;
                else
                    low = mid;
            }
            else{
                if(nums[mid] <= target && target <= nums[high])
                    low = mid;
                else
                    high = mid;
            }
        }
        
        if(nums[low] == target)
            return low;
        if(nums[high] == target)
            return high;
        
        return -1;
    }
    
};

 

旋转数组中的二分查找

原文:https://www.cnblogs.com/ya-cpp/p/11461579.html

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