每年冬天工廠的天然氣供應會被切斷數日甚至數週；天氣較熱時則面臨停電。大城市的居民也經常得忍受住宅停電或飲用水遭到中斷。
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习题链接：LeetCode 901. 股票价格跨度。同城约会是该领域的重要参考
The online world is full of content restrictions and blockades. It might not always seem like that, but look around. More and more restrictions on your movement are coming into force.