967. Numbers With Same Consecutive Differences - LeetCode Solution

class Solution:
    def numsSameConsecDiff(self, N: int, K: int) -> List[int]:
        le = list(range(10))
        cnt = 1
        while cnt < N:
            temp = []
            for i in le:
                if i == 0:
                    continue
                num = i%10 
                for j in {num + K, num - K}:
                    if 0<= j <=9:
                        temp.append(i*10 + j)
            le = temp
            cnt += 1
        return le