-> std::vector<std::vector<int>>

{

auto adjacency_matrix = std::vector<std::vector<int>>(row, std::vector<int>(col, 0));

for (const auto& [x, y] : edges)

{

if (x < row && y < col)

{

adjacency_matrix[x][y] = 1;

}

}

return adjacency_matrix;

{

auto adjacency_matrix = std::vector<std::vector<int>>(row, std::vector<int>(col, 0));

return adjacency_matrix;

{

auto adjacency_matrix = std::vector<std::vector<int>>(row, std::vector<int>(col, 1));

return adjacency_matrix;