My Solution to A Distance Maximizing Problem

算法思想借鉴自:http://blog.csdn.net/clamreason/article/details/7904062

由2个元素开始作为初始条件,一个一个元素的添加进现有数组,保存2个变量,1个是currMin,就是当前处理的子数组的最小元素,一个是maxDiff,就是当前处理的子数组中最大的数对之差。如果当前添加的元素比min小,更新min,如果当前添加的元素减去min比maxDiff大,那么更新maxDiff。

/* 
LeetCode: A Distance Maximizing Problem
return value: max difference
parameters: arr - the array, range [0, len-1]
len - the length of the array
*/
int MaxDifference(int arr[], int len)
{
    if (!arr || len < 2)
        return 0;

    int currMin = arr[0] < arr[1] ? arr[0] : arr[1];    //current min
    int maxDiff = arr[1] - arr[0];                        //max difference

    for (int i = 2; i < len; i++)
    {
        if (maxDiff < arr[i] - currMin)
            maxDiff = arr[i] - currMin;

        if (arr[i] < currMin)
            currMin = arr[i];
    }

    return maxDiff;
}

 

 

 

 

 

EOF

posted on 2012-12-08 22:52  kkmm  阅读(569)  评论(0编辑  收藏  举报