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 0n263 .

输出格式

Its only line consists of the smallest nonnegative integer q such that q2n .

样例

Input
122333444455555
Output
11060446

提示

1223334444555550.511060445.038765619

1286 人解决,1831 人已尝试。

1719 份提交通过,共有 7205 份提交。

1.9 EMB 奖励。

创建: 17 年,5 月前.

修改: 6 年,3 月前.

最后提交: 2 周前.

来源: BOI 2006