Maximum Subsequence Sum (25)

#include <iostream>
using namespace std;
int main()
{
    int n;
    cin >> n;
    int *a = (int*)malloc(n*sizeof(int));
    for (int i = 0; i < n; i++){
        cin >> a[i];
    }

    int max = -1,sum=0;
    int maxl = a[0], maxr = a[0];
    int l = a[0],r=a[0];
    bool negative = true;
    for (int i = 0; i < n; i++){
        sum += a[i];
        if (sum>max){
            max = sum;
            maxl = l;
            maxr = a[i];
            negative = false;
        }
        else if (sum < 0){
            sum = 0;
            l = a[i + 1];
        }
    }
    if (negative == true){
        max = 0;
        maxl = a[0];
        maxr = a[n - 1];
    }
    cout << max << " " << maxl << " " << maxr;
}