{"raw_statement":[{"iden":"statement","content":""},{"iden":"input","content":"The input contains a single integer _a_ (1 ≤ _a_ ≤ 30)."},{"iden":"output","content":"Output a single integer."},{"iden":"example","content":"Input\n\n3\n\nOutput\n\n27"}],"translated_statement":[{"iden":"statement","content":"输入包含一个整数 #cf_span[a] (#cf_span[1 ≤ a ≤ 30])。\n\n请输出一个整数。\n\n"},{"iden":"input","content":"输入包含一个整数 #cf_span[a] (#cf_span[1 ≤ a ≤ 30])。"},{"iden":"output","content":"请输出一个整数。"}],"sample_group":[],"show_order":[],"formal_statement":"Given: $ a \\in \\mathbb{Z}, \\; 1 \\leq a \\leq 30 $\n\nOutput: $ f(a) \\in \\mathbb{Z} $","simple_statement":null,"has_page_source":false}