문제<\/h2>
The NWRRC security server has a final access check for teams that try to submit their solutions to the secret hidden problem.<\/p>
To pass the check, the team must enter three passwords $s<\/mi><\/mrow>s<\/math><\/span><\/span> s<\/span><\/span><\/span><\/span>, t<\/mi><\/mrow>t<\/math><\/span><\/span> t<\/span><\/span><\/span><\/span>, and u<\/mi><\/mrow>u<\/math><\/span><\/span> u<\/span><\/span><\/span><\/span> that the system will accept. Each password must be a non-empty string consisting of at most 5000<\/mn><\/mrow>5000<\/math><\/span><\/span> 5000<\/span><\/span><\/span><\/span> lowercase English letters.<\/p> The rules of the server are public:<\/p> The distance between s<\/mi><\/mrow>s<\/math><\/span><\/span> s<\/span><\/span><\/span><\/span> and t<\/mi><\/mrow>t<\/math><\/span> The distance between s<\/mi><\/mrow>s<\/math><\/span><\/span> s<\/span><\/span><\/span><\/span> and u<\/mi><\/mrow>u<\/math><\/span> The distance between t<\/mi><\/mrow>t<\/math><\/span><\/span> t<\/span><\/span><\/span><\/span> and u<\/mi><\/mrow>u<\/math><\/span>$

Defense Distance