/*
简单dp
dp[i]:以array[i]结尾的数组和;
两种状态:要么选择前面dp[i-1],要么不选,取最大值,
dp[i] = max(dp[i-1]+ array[i], array[i])
*max_element():求数组中最大值
*/
class Solution {
public:
    int FindGreatestSumOfSubArray(vector<int> array) {
        int ret = array[0];
        int tmp = 0;
        for(auto k : array){
            if(tmp + k < 0){
                tmp = 0;
            }else{
                tmp += k;
            }
            ret = max(ret, tmp);
        }
        if(tmp != 0) return ret;
        return *max_element(array.begin(), array.end());
    }
};