def in_board(x, y, n, m): if 0 <= x < m and 0 <= y < n: return True return False def find_paths(graph, node, time, visited:list, n, m, queue:list, res): x, y = node visited[x][y] = 1 for i in range(4): xx, yy = x+ix[i], y+iy[i] if in_board(xx,...