def random_nonogram(row_count, col_count):
cell_count = row_count * col_count
# nonograms with half of the cells colored are the hardest
colored_cell_count = np.random.binomial(cell_count, 0.5)
fields = list(itertools.product(range(row_count), range(col_count)))
colored_fields = random.sample(fields, k=colored_cell_count)
nonogram = Nonogram(row_count, col_count, colored_cells=colored_fields)
nonogram.calculate_descriptors()
nonogram.reset_cells()
if nonogram.solve():
return nonogram
else:
return random_nonogram(row_count, col_count)
