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1348. Perimeter

Time Limit:	1 seconds
Memory Limit:	262144KB
Points:	100

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В правильный N-угольник вписана окружность радиуса R (2 < N < 1001, 0 < R <20). Найти периметр N-угольника. Ответ вывести с точностью до сотых (разряды, меньшие сотых, не выводить).

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Ввод

Вывод

10.0

80.00

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Problems from Contests and Camps /

School olympiads and couses of Vologda region /

Different Contests /

Contest VML 22.03.2015 /

1348.

1349. B - Next Day

1350. C - Fibonacci Numbers

1351. D - Prime Numbers

time generating 0.093 sec.