#include

#include

class Grid {

public:

Grid(int size) : size(size), matrix(size, std::vector<int>(size, 0)) {}

void construct() {

for (int i = 0; i < size; ++i)

matrix[i][i] = 1; // Диагональная точность

}

void display() const {

for (const auto& row : matrix) {

for (int cell : row)

std::cout << (cell ? "■ " : ". ");

std::cout << '\n';

}

}

private:

int size;

std::vectorint>> matrix;

};

int main() {

Grid architecture(7);

architecture.construct();

architecture.display();

return 0;

}