{"problem":{"name":"输出保留 12 位小数的浮点数","description":{"content":"读入一个双精度浮点数，保留 $12$ 位小数，输出这个浮点数。 **提示：无需考虑浮点误差。**","description_type":"Markdown"},"platform":"Luogu","limit":{"time_limit":1000,"memory_limit":131072},"difficulty":{"LuoguStyle":"P1"},"is_remote":true,"is_sync":true,"sync_url":null,"sign":"LGB2022"},"statements":[{"statement_type":"Markdown","content":"读入一个双精度浮点数，保留 $12$ 位小数，输出这个浮点数。\n\n**提示：无需考虑浮点误差。**\n\n## Input\n\n只有一行，一个双精度浮点数。\n\n## Output\n\n也只有一行，保留 $12$ 位小数的浮点数。\n\n[samples]","is_translate":false,"language":"English"}],"meta":{"iden":"LGB2022","tags":["顺序结构"],"sample_group":[["3.1415926535798932\n","3.141592653580"]],"created_at":"2026-03-03 11:09:25"}}