Function is_within_bounds

python3/Graphs/count_islands.py:29–30

(r: int, c: int, matrix: List[List[int]])

            dfs(next_r, next_c, matrix)

def is_within_bounds(r: int, c: int, matrix: List[List[int]]) -> bool:
    return 0 <= r < len(matrix) and 0 <= c < len(matrix[0])