Maximum sum

#include <vector>
#include <iostream>
#include <limits>

using namespace std;
 
 
int main() {
    int n;
    cin >> n;
    int largest = 0;
    int last = 0;
    bool first = true;
    for (int i = 0; i < n; ++i) {
        int v;
        cin >> v;
        if (first) {
            first = false;
            largest = v;
            last = v;
        } else {
            int cur = max(v, last + v);
            if (cur > largest) {
                largest = cur;
            }
            last = cur;
        }
    }

    cout << largest << endl;
    return 0;
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED

Test 7

Verdict: ACCEPTED

Test 8

Verdict: WRONG ANSWER

Test 9

Verdict: WRONG ANSWER

Test 10

Verdict: WRONG ANSWER

Test 11

Verdict: ACCEPTED

Test 12

Verdict: ACCEPTED

Test 13

Verdict: ACCEPTED

Test 14

Verdict: ACCEPTED

Test 15

Verdict: ACCEPTED