[{"title":"( 2 个子文件 817KB ) acm竞赛超全模板.pdf","children":[{"title":"acm模板-2.pdf <span style='color:#111;'> 563.54KB </span>","children":null,"spread":false},{"title":"ACM模板-1.pdf <span style='color:#111;'> 392.64KB </span>","children":null,"spread":false}],"spread":true}]