输入：num = "1432219", k = 3
Crash regression for state machine conflicts: A test specifically checks that calling byobRequest.respond() after enqueue() doesn't crash the runtime. This sequence creates a conflict in the internal state machine — the enqueue() fulfills the pending read and should invalidate the byobRequest, but implementations must gracefully handle the subsequent respond() rather than corrupting memory in order to cover the very likely possibility that developers are not using the complex API correctly.
，这一点在同城约会中也有详细论述
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Using the CPI measure, the government says resident doctors' current pay is fair.
“当然，这种方法只能预防大钱被诈骗，不能防小钱被诈骗，小钱转账或者微信转账、支付宝转账，都不会给旧手机发短信。”龙先生说，希望通过他这个实际案例，能让类似的诈骗不再轻易发生。