rayon3

#include <iostream>
#include <vector>

using namespace std;

vector <vector<char>> a(1001, vector<char>(1001, '.'));
int c = 0;
int i = 500, j = 500;

bool fillmas(int d, int w, int n) {
    while (d > 0) {
        if (w == 0) {
            j++;
            a[i][j] = '*';
            c++;
        }
        else if (w == 1) {
            i--;
            a[i][j] = '*';
            c++;
        }
        else if (w == 2) {
            j--;
            a[i][j] = '*';
            c++;
        }
        else {
            i++;
            a[i][j] = '*';
            c++;

        }

        if (c == n)
            return false;
        d--;

    }

    return true;


}

int main() {

    int n, d, k;

    cin >> n >> d >> k;

    a[500][500] = '*';

    int round = 0;

    while (fillmas(d, round % 4, n)) {
        round++;

        if (!fillmas(d, round % 4, n))
            break;
        d *= k;
        round++;
    }

    int l = -1, r = -1, t = -1, b = -1;;

    for (int j = 0; j < 1001; j++) {
        for (int i = 0; i < 1001; i++)
            if (a[i][j] == '*') {
                l = j;
                break;
            }
        if (l != -1)
            break;
    }

    for (int i = 1000; i > -1; i--) {
        for (int j = 0; j < 1001; j++)
            if (a[i][j] == '*') {
                b = i ;
                break;
            }
        if (b != -1)
            break;
    }

    for (int i = 0; i < 1001; i++) {
        for (int j = 0; j < 1001; j++)
            if (a[i][j] == '*') {
                t = i;
                break;
            }
        if (t != -1)
            break;
    }

    for (int j = 1000; j > -1; j--) {
        for (int i = 1000; i > -1; i--)
            if (a[i][j] == '*') {
                r = j;
                break;
            }
        if (r != -1)
            break;
    }

    for (int i = t; i < b + 1; i++) {
        for (int j = l; j < r + 1; j++)
            cout << a[i][j];
        cout << endl;
    }

    return 0;
}