1493. SQUINT

单点时限: 2.0 sec

内存限制: 256 MB

Write a program to calculate integer square roots.

输入格式

Its only line consists of an integer .

输出格式

Its only line consists of the smallest nonnegative integer such that .

样例

Input
122333444455555
Output
11060446

提示

754 人解决,1248 人已尝试。

1021 份提交通过,共有 4697 份提交。

2.5 EMB 奖励。

创建: 12 年,5 月前.

修改: 1 年,4 月前.

最后提交: 2 天,10 小时前.

来源: BOI 2006

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