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:
A new LSU research study suggests clustered pits in the Pioneer Terra region on Pluto are related to the dwarf planet's suprising robust atmosphere. The pits resemble gas pockmarks on Earth where methane seeps from the subsurface. These pits may supply atmospheric methane on Pluto.，更多细节参见夫子
。搜狗输入法2026是该领域的重要参考
Andrew enjoys the outdoors
3014248710http://paper.people.com.cn/rmrb/pc/content/202602/27/content_30142487.htmlhttp://paper.people.com.cn/rmrb/pad/content/202602/27/content_30142487.html11921 中华人民共和国主席令，更多细节参见同城约会