#define _USE_MATH_DEFINES #include <cstdio> #include <iostream> #include <sstream> #include <fstream> #include <iomanip> #include <algorithm> #include <cmath> #include <complex> #include <string> #include <vector> #include <array> #include <list> #include <queue> #include <stack> #include <set> #include <map> #include <bitset> #include <numeric> #include <limits> #include <climits> #include <cfloat> #include <functional> #include <iterator> #include <memory> #include <regex> using namespace std; int main() { int n; cin >> n; vector<vector<int> > v(n, vector<int>(n, 0)); int cnt = 1; for(int i=0; i<n; ++i){ for(int y=0; y<n/2; ++y){ int x = i - y; if(0 <= x && x < n / 2){ v[y+n/2][x+n/2] = cnt; ++ cnt; v[y][x] = cnt; ++ cnt; } } } for(int i=0; i<n; ++i){ for(int y=0; y<n/2; ++y){ int x = n - 1 - i + y; if(n / 2 <= x && x < n){ v[y][x] = cnt; ++ cnt; v[y+n/2][x-n/2] = cnt; ++ cnt; } } } for(int y=0; y<n; ++y){ cout << v[y][0]; for(int x=1; x<n; ++x) cout << ' ' << v[y][x]; cout << endl; } return 0; }