{"raw_statement":[{"iden":"statement","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。**"},{"iden":"input","content":"只有一行，一个双精度浮点数。"},{"iden":"output","content":"也只有一行，保留 $12$ 位小数的浮点数。"}],"translated_statement":null,"sample_group":[["3.1415926535798932\n","3.141592653580"]],"show_order":[],"formal_statement":null,"simple_statement":null,"has_page_source":false}