Laivanupotus

#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <set>
#include <iomanip>
#include <cstdlib>
#include <queue>

#define uint unsigned int
#define INF 999999999
#define ll long long
#define M 1000000007
#define E 0.0000001
#define N 131072

using namespace std;

int main () {
    string c[] = {"..*.", "*...", "...*", ".*.."};
    int n;
    cin>>n;
    for (int y = 0; y < n; y++) {
        for (int x = 0; x < n; x++) {
            cout<<c[y % 4][x % 4];
        }
        cout<<endl;
    }
    return 0;
}

/**

..*.
*...
...*
.*..
*/

Test 1

Group: 1

Verdict: ACCEPTED

Test 2

Group: 1

Verdict: ACCEPTED

Test 3

Group: 1

Verdict: WRONG ANSWER

Test 4

Group: 1

Verdict: ACCEPTED

Test 5

Group: 1

Verdict: ACCEPTED

Test 6

Group: 2

Verdict: ACCEPTED

Test 7

Group: 2

Verdict: ACCEPTED

Test 8

Group: 2

Verdict: ACCEPTED

Test 9

Group: 2

Verdict: WRONG ANSWER

Test 10

Group: 2

Verdict: WRONG ANSWER

Test 11

Group: 3

Verdict: WRONG ANSWER

Test 12

Group: 3

Verdict: ACCEPTED

Test 13

Group: 3

Verdict: ACCEPTED

Test 14

Group: 3

Verdict: WRONG ANSWER

Test 15

Group: 3

Verdict: ACCEPTED