2D Array - DS

#include <bits/stdc++.h>
using namespace std;

int hourglassSum(vector<vector<int>> arr) {
    int maxSum = -50000;
    for(int i = 1; i < 5; ++i)
        for(int j = 1; j < 5; ++j){
            int previousLineSum = arr[i-1][j-1] + arr[i-1][j] + arr[i-1][j + 1];
            int nextLineSum = arr[i+1][j-1] + arr[i+1][j] + arr[i+1][j + 1];
            int currentSum = previousLineSum + nextLineSum + arr[i][j];
            if(currentSum > maxSum)
                maxSum = currentSum;
        }
     return maxSum;
}

int main()
{
    ofstream fout(getenv("OUTPUT_PATH"));

    vector<vector<int>> arr(6);
    for (int i = 0; i < 6; i++) {
        arr[i].resize(6);

        for (int j = 0; j < 6; j++) {
            cin >> arr[i][j];
        }

        cin.ignore(numeric_limits<streamsize>::max(), '\n');
    }

    int result = hourglassSum(arr);

    fout << result << "\n";

    fout.close();

    return 0;
}