SAT (short for "satisfiability") is a logic problem that given a boolean formula, it asks whether the boolean formula has an assignment that makes the problem true. An example boolean formula is:
一名美国政府官员表示，尽管钇和钪的短缺尚未直接拖累喷气发动机和芯片的产量，但部分美国制造商已出现来自中国的特定稀土原料“短缺”问题。
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#include <stdio.h