Card game

#include <iostream>
#include <vector>

using namespace std;

int main(){
    int n;
    cin >> n;
    vector<int> arr(n);
    for (int i=0;i<n;i++){
        cin >> arr[i];
    }

    vector<int> dp(n, 0);
    dp[1]=arr[1];
    for (int i=2;i<n-1;i++){
        dp[i]=max(dp[i-3]+arr[i], dp[i-1]);
    }
    cout << dp[n-2] << '\n';
}

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