Counting Stars

def solve(n, data):
    n = int(n)
    grid = str(data).strip().split(',')
    rows = len(grid)
    cols = max(len(r) for r in grid) if rows > 0 else 0
    visited = [[False]*cols for _ in range(rows)]
    def dfs(r, c):
        if r < 0 or r >= rows or c < 0 or c >= cols: return
        if visited[r][c] or c >= len(grid[r]) or grid[r][c] == '.': return
        visited[r][c] = True
        for dr, dc in [(-1,0),(1,0),(0,-1),(0,1),(-1,-1),(-1,1),(1,-1),(1,1)]:
            dfs(r+dr, c+dc)
    count = 0
    for r in range(rows):
        for c in range(len(grid[r])):
            if not visited[r][c] and grid[r][c] == '*':
                dfs(r, c)
                count += 1
    print(count)