题目
代码

class Solution:
    def construct2DArray(self, original: List[int], m: int, n: int) -> List[List[int]]:
        ans=[]
        if m*n!=len(original):
            return []
        for i in range(m):
            temp=[]
            for j in range(n):
                temp.append(original[i*n+j])
            ans.append(temp)
        return ans

【写法2】

class Solution:
    def construct2DArray(self, original: List[int], m: int, n: int) -> List[List[int]]:
        return [original[i: i + n] for i in range(0, len(original), n)] if len(original) == m * n else []