I learned that for 4-SAT, if clause to variable ratio is more than 10, the generated problems become difficult to solve, and the likelihood of formula to be SAT or UNSAT is close to 50%. So I generated 3 types of formulas:
Израиль нанес удар по Ирану09:28，详情可参考Line官方版本下载
对我来说，重要的是不断探索速度的各种可能性。。safew官方下载对此有专业解读
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