Card game

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

int main() {
    int n;
    cin >> n;
    vector<int> numbers;
    vector<int> score;
    numbers.reserve(n);
    score.reserve(n);
    score[0] = 0;
    for (int i=0; i<n; i++) {
        cin >> numbers[i];
    }
    for (int i=1; i<n-1; i++) {
        int subMax = 0;  // subMaxxing
        for (int j=i-5; j<i-2; j++) {
            if (j<0) continue;
            subMax = max(subMax, score[j]);
        }
        score[i] = subMax + numbers[i];
    }

    int best = 0;
    for (int i=n-4; i<n-1; i++) {
        if (i<0) continue;
        best = max(best, score[i]);
    }

    cout << best << 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: ACCEPTED

Test 9

Verdict: ACCEPTED

Test 10

Verdict: ACCEPTED

Test 11

Verdict: ACCEPTED

Test 12

Verdict: ACCEPTED

Test 13

Verdict: ACCEPTED

Test 14

Verdict: ACCEPTED

Test 15

Verdict: ACCEPTED