#include<iostream> using namespace std; int a[101][101]; int n; int main() { cin >> n; int i = 0; int x = 1; int y = n; while (i <= n * n) { while (x >= 1 && x <= n && y >= 1 && y <= n && a[x][y] == 0) { i++; x++; a[x][y] = i; } x--; y--; while (x >= 1 && x <= n && y >= 1 && y <= n && a[x][y] == 0) { i++; y--; a[x][y] = i; } y++; x--; while (x >= 1 && x <= n && y >= 1 && y <= n && a[x][y] == 0) { i++; x--; a[x][y] = i; } x++; y++; while (x >= 1 && x <= n && y >= 1 && y <= n && a[x][y] == 0) { i++; y++; a[x][y] = i; } y--; x++; } for (int i = 1; i <= n; i++) { for (int j = 1; j <= n; j++) { cout << a[i][j] << " "; } cout << endl; } return 0; }