// remmeber the begin and the end
//return the array

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

在【-1 -2】的时候，返回的是-2，结果是不对的

正确结果

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