53. Maximum Subarray

Question
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.

• third attempt

class Solution {
public:
    int maxSubArray(vector& nums) {       
        if(nums.size()==0)
            return 0;
        if(nums.size()==1)
            return nums[0];
        int sum = nums[0];
        int current= nums[0];
       for(int i = 1 ; i < nums.size();i++)
       {
           if(current <0)
               current = 0;      
           current+=nums[i];
           if(current>sum)
               sum = current;
     
       }
        return sum;
    }
};