标签存档: SGU111

SGU 111 解题报告

http://acm.sgu.ru/problem.php?contest=0&problem=111

111. Very simple problem

time limit per test: 0.50 sec.
memory limit per test: 4096 KB

You are given natural number X. Find such maximum integer number that it square is not greater than X.

Input

Input file contains number X (1≤X≤101000).

Output

Write answer in output file.

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