// 数组完全有序，直接返回0
d = {"1": None}
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However, in a narrow set of cases, we believe AI can undermine, rather than defend, democratic values. Some uses are also simply outside the bounds of what today’s technology can safely and reliably do. Two such use cases have never been included in our contracts with the Department of War, and we believe they should not be included now:
// Stateful transform — a generator that wraps the source