2373. Largest Local Values in a Matrix

class Solution {
public:
    vector<vector<int>> largestLocal(vector<vector<int>>& grid) {
        int n = grid.size();

        for(int i = 1; i < n - 1; ++i) {
            for(int j = 1; j < n - 1; ++j) {
                int temp = 0;

                for(int k = i - 1; k <= i + 1; ++k) {
                    for(int l = j - 1; l <= j + 1; ++l) {
                        temp = max(temp, grid[k][l]);
                    }
                }

                grid[i - 1][j - 1] = temp;
            }
        }

        grid.resize(n - 2);
        for (int i = 0; i < grid.size(); ++i) {
            grid[i].resize(n - 2);
        }

        return grid;
    }
};