Maximum Number of Removal Queries That Can Be Processed I — Python

# Time:  O(n^2)
# Space: O(n^2)

# dp
class Solution(object):
    def maximumProcessableQueries(self, nums, queries):
        """
        :type nums: List[int]
        :type queries: List[int]
        :rtype: int
        """
        dp = [[float("-inf")]*len(nums) for _ in xrange(len(nums))]
        dp[0][-1] = 0
        for l in reversed(xrange(1, len(nums))):
            for i in xrange(len(nums)-(l-1)):
                j = i+(l-1)
                if i-1 >= 0:
                    dp[i][j] = max(dp[i][j], dp[i-1][j]+(1 if nums[i-1] >= queries[dp[i-1][j]] else 0))
                if j+1 < len(nums):
                    dp[i][j] = max(dp[i][j], dp[i][j+1]+(1 if nums[j+1] >= queries[dp[i][j+1]] else 0))
                if dp[i][j] == len(queries):
                    return len(queries)
        return max(dp[i][i]+(1 if nums[i] >= queries[dp[i][i]] else 0) for i in xrange(len(nums)))