Москвичей предупредили о резком похолодании09:45
Resolving dependencies... done
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习题链接：LeetCode 503. 下一个更大元素 II
Forgetting releaseLock() permanently breaks the stream. The locked property tells you that a stream is locked, but not why, by whom, or whether the lock is even still usable. Piping internally acquires locks, making streams unusable during pipe operations in ways that aren't obvious.