Maximum Product Subarray

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.

 

public class Solution {
    public int maxProduct(int[] nums) {
        if (nums == null || nums.length == 0) {
        	return 0;
        }
        int max = nums[0];
        int min = nums[0];
        int res = nums[0];
        int maxEnd = 0;
        int minEnd = 0;
        for (int i = 1; i < nums.length; i++) {
        	maxEnd = max * nums[i];
        	minEnd = min * nums[i];
        	max = Math.max(Math.max(maxEnd, minEnd), nums[i]);
        	min = Math.min(Math.min(maxEnd, minEnd), nums[i]);
        	res = Math.max(max, res);
		}
        return res;
    }
}