wkejfbow

#include <iomanip>
#include <iostream>
using namespace std;
int main()
{
    int size;
    cin >> size;
    int m = 0;
    int n = 0;
    int** matrix;
    matrix = new int* [size];
    for (int i = 0; i < size; i++)
        matrix[i] = new int[size];

    for (int i = 0; i < size; ++i)
    {
        for (int j = 0; j < size; ++j)
        {
            matrix[i][j] = 0;
        }
    }


    for (int count = 0; count < size*size - 1;)
    {
        for (int i = n; i < size - n - 1; ++i)
        {
            matrix[m][i] = count++;
        }
        for (int i = m; i < size - m - 1; ++i)
        {
            matrix[i][size - n - 1] = count++;
        }
        for (int i = size - n - 1; i > m; --i)
        {
            matrix[size - m - 1][i] = count++;
        }
        for (int i = size - m - 1; i > n; --i)
        {
            matrix[i][n] = count++;
        }
        ++m;
        ++n;
    }

    if (size % 2 != 0)
    {
        matrix[size / 2][size / 2] = size*size - 1;
    }

    for (int i = 0; i < size; ++i)
    {
        for (int j = 0; j < size; ++j)
        {
            cout << matrix[i][j] << ' ';

        }
        cout << endl;
    }
    return 0;
}