| 22 | #define vi vector<ll> |
| 23 | |
| 24 | void solve() |
| 25 | { |
| 26 | ll n; |
| 27 | cin >> n; |
| 28 | vector<vi> v(n, vi(n)); |
| 29 | ll odd = 1; |
| 30 | ll even = 2; |
| 31 | bool flag = 1; |
| 32 | for (int i = 0; i < n; ++i) |
| 33 | { |
| 34 | for (int j = 0; j < n; ++j) |
| 35 | { |
| 36 | if (flag) |
| 37 | { |
| 38 | v[i][j] = odd; |
| 39 | odd += 2; |
| 40 | } |
| 41 | else |
| 42 | { |
| 43 | v[i][j] = even; |
| 44 | even += 2; |
| 45 | } |
| 46 | flag = !flag; |
| 47 | } |
| 48 | if (n % 2 == 0) |
| 49 | flag = !flag; |
| 50 | } |
| 51 | |
| 52 | for (int i = 0; i < n; ++i) |
| 53 | { |
| 54 | for (int j = 0; j < n; ++j) |
| 55 | { |
| 56 | cout << v[i][j] << " "; |
| 57 | } |
| 58 | cout << endl; |
| 59 | } |
| 60 | } |
| 61 | |
| 62 | int main() |
| 63 | { |