import std.stdio, std.array, std.string, std.conv, std.algorithm; import std.typecons, std.range, std.random, std.math, std.container; import std.numeric, std.bigint, core.bitop, core.stdc.stdio; int[][] ms_odd(int n) { auto ans = new int[][](n, n); int r = 0; int c = n / 2; foreach (i; 1..n*n+1) { ans[r][c] = i; int nr = r == 0 ? n - 1 : r-1; int nc = (c+1) % n; if (ans[nr][nc] > 0) { nr = (r+1) % n; nc = c; } r = nr; c = nc; } return ans; } int[][] ms_4n(int n) { auto ans = new int[][](n, n); int i = 1; foreach (r; 0..n) { foreach (c; 0..n) { if ((r % 4 == 0 || r % 4 == 3) && (c % 4 == 0 || c % 4 == 3)) ans[r][c] = i; if ((r % 4 == 1 || r % 4 == 2) && (c % 4 == 1 || c % 4 == 2)) ans[r][c] = i; i++; } } i = 1; foreach (r; iota(n-1, -1, -1)) { foreach (c; iota(n-1, -1, -1)) { if (ans[r][c] == 0) ans[r][c] = i; i++; } } return ans; } int[][] ms_4n2(int n) { auto ans = new int[][](n, n); auto base = ms_odd(n/2); foreach (r; 0..n/2) foreach (c; 0..n/2) base[r][c] = (base[r][c]-1) * 4; auto LUX = new char[][](n/2, n/2); foreach (r; 0..n/2) foreach (c; 0..n/2) { if (r <= n/4) LUX[r][c] = 'L'; else if (r == n/4+1) LUX[r][c] = 'U'; else LUX[r][c] = 'X'; } swap(LUX[n/4][n/4], LUX[n/4+1][n/4]); foreach (r; 0..n/2) { foreach (c; 0..n/2) { auto p = new int[][](2, 2); if (LUX[r][c] == 'L') p = [[4, 1], [2, 3]]; else if (LUX[r][c] == 'U') p = [[1, 4], [2, 3]]; else if (LUX[r][c] == 'X') p = [[1, 4], [3, 2]]; foreach (dr; 0..2) { foreach (dc; 0..2) { ans[r*2+dr][c*2+dc] = p[dr][dc] + base[r][c]; } } } } return ans; } void main() { auto N = readln.chomp.to!int; int[][] ans; if (N % 2 == 1) ans = ms_odd(N); else if (N % 4 == 0) ans = ms_4n(N); else ans = ms_4n2(N); ans.each!(a => a.map!(to!string).join(" ").writeln); }