Java for LeetCode 053 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.

解题思路：

看题目，一次遍历肯定能搞定问题，只需使用一个sum计算遍历下来可能的最大的和，一个maxSum记录数目的最大值，maxSum即为所求，JAVA实现如下：

static public int maxSubArray(int[] nums) {
	  int sum=nums[0],maxSum=sum;
	  for(int i=1;i<nums.length;i++){
		  if(sum<=0)
			  sum=nums[i];
		  else
			  sum+=nums[i];
		  maxSum=Math.max(maxSum, sum);
	  }
	  return maxSum;
  }