2025-08-15 09:49:02 +0000 UTC

class Solution:
    def decode(self, encoded: List[int], first: int) -> List[int]:
        prev_encoded = encoded[0]
        encoded[0] = first
        for i in range(1, len(encoded)):
            encoded[i], prev_encoded = prev_encoded ^ encoded[i - 1], encoded[i]
        encoded.append(prev_encoded ^ encoded[-1])
        return encoded