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#12735. Alex 的折纸正方形

Statistiques

Alex 热衷于折纸——一种日本的纸艺。大多数折纸设计都需要一张正方形的纸。Alex 打算为他的母亲制作一份礼物。礼物的制作需要三张大小相等的正方形纸,但 Alex 手头只有一张长方形的纸。他可以从这张纸上裁剪出正方形,但裁剪出的正方形的边必须与原纸张的边平行。请帮助 Alex 确定他能裁剪出的正方形的最大边长。

输入格式

输入文件的唯一一行包含两个整数 $h$ 和 $w$,分别表示纸张的高度和宽度 ($1 \le h, w \le 1000$)。

输出格式

输出一个实数,表示正方形边长的最大可能值。要求能够从 $h \times w$ 的纸张中裁剪出三个这样的正方形,且它们的边与纸张的边平行。

你的答案需要精确到小数点后三位。

样例 1

样例 2

样例

输入格式 1

210 297

输出格式 1

105.000

输入格式 2

250 100

输出格式 2

83.333

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