1950B - Upscaling - CodeForces Solution

def solve(n):
    matrix = [["." for _ in range(2 * n)] for _ in range(2 * n)]
    cnt = 0
    for i in range(len(matrix)):
        cnt += 1
        if cnt == 1 or cnt == 2:
            k = 0
        elif cnt == 3 or cnt == 4:
            k = 2
        elif cnt > 4:
            cnt = 1
            k = 0
        new_cnt = 0
        while k < len(matrix):
            new_cnt += 1
            if new_cnt == 1 or new_cnt == 2:
                matrix[i][k] = '#'
            elif new_cnt > 2:
                new_cnt = -1
            k += 1
    for row in matrix:
        for k in row:
            print(k, end = '')
        print()

def load_data():
    t = int(input())
    while t > 0:
        a = int(input())
        solve(a)
        t -= 1

load_data()