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:
"Left for college, got a new job across the country, or moved abroad. You promised to stay close, but everyone's busy and time zones make it worse."
。业内人士推荐体育直播作为进阶阅读
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华米的有点原地踏步了的感觉（）