Fraktaali

#include<iostream>
#include<string>
#include<vector>

using namespace std;

vector<vector<string>> c(vector<vector<string>> l) {
	vector<vector<string>> r = l;
	int s = l.size();
	int k = l[0].size();

	for (int i = 0; i < s; i++) {
		for (int j = 0; j < k; j++) {
			r[i].push_back(l[i][j]);
		}
	}

	for (int i = 0; i < s; i++) {
		r.push_back(l[i]);
	}

	for (int i = 0; i < s; i++) {
		for (int j = 0; j < k; j++) {
			r[i + s].push_back((l[i][j] == "#") ? "." : "#");
		}
	}

	return r;
}

int main() {
	int t;
	cin >> t;

	if (t == 1) {
		cout << "#" << "\n";
		return 0;
	}

	vector<vector<string>> l;
	l.push_back({ "#", "#" });
	l.push_back({ "#", "." });

	for (int i = 1; i < t-1; i++) {
		l = c(l);
	}

	int s = l.size();
	int k = l[0].size();
	string v;
	for (int i = 0; i < s; i++) {
		for (int j = 0; j < k; j++) {
			v += l[i][j];
		}
		v += "\n";
	}

	cout << v;

	return 0;
}

Test 1

Group: 1

Verdict: ACCEPTED

Test 2

Group: 2

Verdict: ACCEPTED

Test 3

Group: 3

Verdict: ACCEPTED

Test 4

Group: 4

Verdict: ACCEPTED

Test 5

Group: 5

Verdict: ACCEPTED

Test 6

Group: 6

Verdict: ACCEPTED

Test 7

Group: 7

Verdict: ACCEPTED

Test 8

Group: 8

Verdict: ACCEPTED

Test 9

Group: 9

Verdict: ACCEPTED

Test 10

Group: 10

Verdict: ACCEPTED