2025-08-20 16:05:44 +0000 UTC

class Solution:
    def mergeArrays(self, nums1: List[List[int]], nums2: List[List[int]]) -> List[List[int]]:
        freqs = [0] * 1001
        for idx, val in itertools.chain(nums1, nums2):
            freqs[idx] += val
        res = []
        for i, freq in enumerate(freqs):
            if freq > 0:
                res.append((i, freq))
        return res