{"problem":{"name":"A. Numbers Joke","description":{"content":"","description_type":"Markdown"},"platform":"Codeforces","limit":{"time_limit":2000,"memory_limit":65536},"difficulty":"None","is_remote":true,"is_sync":true,"sync_url":null,"sign":"CF784A"},"statements":[{"statement_type":"Markdown","content":"## Input\n\nThe input contains a single integer _a_ (1 ≤ _a_ ≤ 30).\n\n## Output\n\nOutput a single integer.\n\n[samples]","is_translate":false,"language":"English"},{"statement_type":"Markdown","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## Input\n\n输入包含一个整数 #cf_span[a] (#cf_span[1 ≤ a ≤ 30])。\n\n## Output\n\n请输出一个整数。\n\n[samples]","is_translate":true,"language":"Chinese"},{"statement_type":"Markdown","content":"Given: $ a \\in \\mathbb{Z}, \\; 1 \\leq a \\leq 30 $\n\nOutput: $ f(a) \\in \\mathbb{Z} $","is_translate":false,"language":"Formal"}],"meta":{"iden":"CF784A","tags":[],"sample_group":[["3","27"]],"created_at":"2026-03-03 11:00:39"}}