54 lines
998 B
C++
54 lines
998 B
C++
#include <bits/stdc++.h> // {{{
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// https://codeforces.com/blog/entry/96344
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#pragma GCC optimize("O2,unroll-loops")
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#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
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using namespace std;
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using i32 = int32_t;
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using u32 = uint32_t;
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using i64 = int64_t;
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using u64 = uint64_t;
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using f64 = double;
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using f128 = long double;
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// }}}
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void solve() {
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u32 n;
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cin >> n;
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vector<vector<char>> board(2 * n, vector<char>(2 * n, '.'));
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for (u32 i = 0; i < n; ++i) {
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for (u32 j = 0; j < n; ++j) {
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if ((i & 1) == (j & 1)) {
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board[2 * i][2 * j] = '#';
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board[2 * i + 1][2 * j] = '#';
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board[2 * i + 1][2 * j + 1] = '#';
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board[2 * i][2 * j + 1] = '#';
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}
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}
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}
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for (auto& r : board) {
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for (auto& c : r) {
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cout << c;
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}
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cout << '\n';
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}
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}
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int main() { // {{{
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cin.tie(nullptr)->sync_with_stdio(false);
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cin.exceptions(cin.failbit);
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int tc = 1;
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cin >> tc;
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for (int t = 0; t < tc; ++t) {
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solve();
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}
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return 0;
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}
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// }}}
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