重做53. Maximum Subarray

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

For example, given the array [-2,1,-3,4,-1,2,1,-5,4],
the contiguous subarray [4,-1,2,1] has the largest sum = 6.

只需要比较现在的数和加上数之后的和就可以。

public class Solution {
    public int maxSubArray(int[] nums) {
        int[] dp=new int[nums.length];
        dp[0]=nums[0];
        int max=dp[0];
        for(int i=1;i<nums.length;i++)
        {

            dp[i]=Math.max(dp[i-1]+nums[i],nums[i]);
            max=Math.max(dp[i],max);
        }
        return max;
    }
}