Card game

#include <bits/stdc++.h>
 
using namespace std;
 
const int maxN = 1e6;
int count_array[maxN];
vector<int> card_values; 
 
int main() {
    
    int n;
    cin >> n;
 
    for (int i = 0; i < n; i++) {
        int c;
        cin >> c; 
        card_values.push_back(c);
    }
    
    // count_array[0] = 0;
 
    for (int x = 1; x < n - 1; x++) {
 
        if (x - 5 >= 1) {
            count_array[x] = card_values[x] + max(count_array[x-3], max(count_array[x-4], count_array[x-5]));
        } 
        else if (x - 4 >= 1) {
            count_array[x] = card_values[x] + max(count_array[x-3], count_array[x-4]);
        }
        else if (x - 3 >= 1) {
            count_array[x] = card_values[x] + count_array[x-3];
        } 
        else {
            count_array[x] = card_values[x]; 
        }
    }
 
    cout << *max_element(count_array, count_array + maxN) << 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