~/algor $ cat masalalar/doira-yuzi
Begin-21
Doira yuzi
Muallif:
Iqbolshoh Ilhomjonov
Oson
1000 ms
64 MB
12%
Doiraning radiusi $r$ berilgan. Uning yuzi $S$ ni toping:
$$S = \pi * r^{2}$$
$\pi = 3.141592653589793$ deb oling.
Kiruvchi ma'lumotlar
Bitta natural son $r$.
Chiquvchi ma'lumotlar
Bitta son — $S$, nuqtadan keyin aynan 2 ta raqam bilan (masalan, 12.57).
Izoh
$1 \le r \le 10^{4}$
Misollar
Kirish #1
1
Chiqish #1
3.14
Kirish #2
2
Chiqish #2
12.57