Card game

#include <algorithm>
#include <cstdio>
#include <iostream>
#include <vector>

using namespace std;

int main(int argc, char *argv[])
{
	// Read the input parameters
	int n;
	cin >> n;

	// Read values from one line
	vector<int> cards(n);
	for (int i = 0; i < n; i++) {
		cin >> cards[i];
	}
	/*for (int i = 0; i < n; i++) {*/
	/*	cout << cards[i];*/
	/*}*/
	/*   cout << "\n";*/

    vector<int> sums(n, 0);
    sums[2] = cards[1];
	for (int i = 3; i < n - 1; i++) {
		int current = cards[i];
        int a = i - 3 >= 2 ? sums[i - 3] : 0;
        int b = sums[i - 1];
        /*cout << a << " " << b << "\n";*/
        sums[i] = max(a + current, b);
	}

    /*for (int i = 0; i < n; i++) {*/
    /*    cout << sums[i] << "\n";*/
    /*}*/

	cout << sums[n - 2] << "\n";
	return 0;
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: WRONG ANSWER

Test 3

Verdict: WRONG ANSWER

Test 4

Verdict: ACCEPTED

Test 5

Verdict: WRONG ANSWER

Test 6

Verdict: WRONG ANSWER

Test 7

Verdict: WRONG ANSWER

Test 8

Verdict: WRONG ANSWER

Test 9

Verdict: WRONG ANSWER

Test 10

Verdict: WRONG ANSWER

Test 11

Verdict: WRONG ANSWER

Test 12

Verdict: ACCEPTED

Test 13

Verdict: ACCEPTED

Test 14

Verdict: ACCEPTED

Test 15

Verdict: ACCEPTED