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Maximum Product Subarray

时间:2014-11-19 10:30:03      阅读:286      评论:0      收藏:0      [点我收藏+]

Dynamic Programming

 

Find the contiguous subarray within an array (containing at least one number) which has the largest product.

For example, given the array [2,3,-2,4],
the contiguous subarray [2,3] has the largest product = 6.

 

C++实现代码:

#include<iostream>
using namespace std;

class Solution {
public:
    int maxProduct(int A[], int n) {
        if(n==0)
            return 0;
        int maxPro[n];
        int minPro[n];
        minPro[0]=maxPro[0]=A[0];
        int i;
        for(i=1;i<n;i++)
        {
            maxPro[i]=max(A[i],max(maxPro[i-1]*A[i],minPro[i-1]*A[i]));
            minPro[i]=min(A[i],min(maxPro[i-1]*A[i],minPro[i-1]*A[i]));
        }
        int max=maxPro[0];
        for(i=0;i<n;i++)
        {
            if(max<maxPro[i])
                max=maxPro[i];
        }
        return max;
    }
};

int main()
{
    Solution s;
    int arr[10]={2,3,-2,4};
    cout<<s.maxProduct(arr,4)<<endl;
}

 

Maximum Product Subarray

原文:http://www.cnblogs.com/wuchanming/p/4107483.html

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