{"problem":{"name":"【深基1.例9】圆的计算","description":{"content":"当半径为 $r=5$，请输出圆的周长、面积和球体积。取 $\\pi=3.141593$。请直接使用 `cout` 输出答案，每行一个数字。","description_type":"Markdown"},"platform":"Luogu","limit":{"time_limit":1000,"memory_limit":524288},"difficulty":{"LuoguStyle":"P1"},"is_remote":true,"is_sync":true,"sync_url":null,"sign":"LGB2606"},"statements":[{"statement_type":"Markdown","content":"当半径为 $r=5$，请输出圆的周长、面积和球体积。取 $\\pi=3.141593$。请直接使用 `cout` 输出答案，每行一个数字。\n\n## Input\n\n不需要输入。\n\n## Output\n\n请直接使用 `cout` 输出答案，每行一个数字。一共三个数字。\n\n[samples]\n\n## Background\n\n**本题来自洛谷编写教材《深入浅出程序设计竞赛 - 基础篇》**，并带有详细的教程和讲解，点击下列链接了解本书详情。[【官方网店绝赞热卖中！】>>>](https://item.taobao.com/item.htm?id=637730514783)","is_translate":false,"language":"English"}],"meta":{"iden":"LGB2606","tags":[],"sample_group":[],"created_at":"2026-03-03 11:09:25"}}