1770. Maximum Score from Performing Multiplication Operations

class Solution:
    def maximumScore(self, nums: List[int], multipliers: List[int]) -> int:
        n, m = len(nums), len(multipliers)
        f = [[-inf] * (m + 1) for _ in range(m + 1)]
        f[0][0] = 0
        res = -inf
        for i in range(m + 1):
            for j in range(m - i + 1):
                k = i + j - 1
                if i > 0:
                    f[i][j] = max(f[i][j], f[i - 1][j] + multipliers[k] * nums[i - 1])
                if j > 0:
                    f[i][j] = max(f[i][j], f[i][j - 1] + multipliers[k] * nums[n - j])
                if i + j == m:
                    res = max(res, f[i][j])
        return res