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(leetcode题解)Search Insert Position

时间:2017-06-08 18:06:44      阅读:182      评论:0      收藏:0      [点我收藏+]

标签:where   二分   insert   val   查找   dup   class   dex   while   

Given a sorted array and a target value, return the index if the target is found. If not, return the index where it would be if it were inserted in order.

You may assume no duplicates in the array.

Here are few examples.
[1,3,5,6], 5 → 2
[1,3,5,6], 2 → 1
[1,3,5,6], 7 → 4
[1,3,5,6], 0 → 0

这是一个典型的二分法查找的变式,C++实现如下

    int searchInsert(vector<int>& nums, int target) {
        int length=nums.size();
        int right=length-1;
        int left=0;
        int mid=(left+right)/2;
        while(left<=right)
        {
            if(nums[mid]==target)
                return mid;
            if(nums[mid]>target)
                right=mid-1;
            else
                left=mid+1;
            mid=(left+right)/2;
        }
        return left;
    }

 

(leetcode题解)Search Insert Position

标签:where   二分   insert   val   查找   dup   class   dex   while   

原文地址:http://www.cnblogs.com/kiplove/p/6963710.html

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