下面横线处应该填入的是什么？

#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;

int maxSubArray(vector<int>& nums) {
    int n = nums.size();
    if (n == 0) return 0;
    vector<int> dp(n, 0);
    dp[0] = nums[0];
    int maxSum = dp[0];
    for (int i = 1; i < n; i++) {
        __________________________
        maxSum = max(maxSum, dp[i]);
    }
    return maxSum;
}