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The Knights Of The Round Table

ด ๋ฌธ œ๋Š”

ธ๊ธฐ๋„:A(A,B,C), „๊ณต๋ฅ :๋ณด†ต(๋‚ฎŒ,๋ณด†ต,๋†’Œ), ๋ ˆ๋ฒจ:2(1~4)

TheKnightsOfTheRoundTable

•„„œ ™•ด ฒœžฅ— ‚ผ๊ฐ˜• ฐฝด žˆ๋Š” ๋ฐฉ— ›ƒ„ ๋†“„ ๊ณ„š„ „šฐ๊ณ  žˆ๋‹ค. ๊ทธ๋Š” –‡๋น›ด ›ƒ œ„— ๋น„ถ”๊ฒŒ •˜๊ณ  ‹ถ๋‹ค. Šนžˆ  •˜ค— ƒœ–‘ด ๋ฐ”๋กœ ๋จธ๋ฆฌ œ„— žˆ„ ๋•Œ๋Š” ›ƒ  „ฒด— –‡๋น›ด ๋น„ถ”๋„๋ก •˜๋ ค๊ณ  •œ๋‹ค.

๊ทธ๋ž˜„œ ๊ทธ ›ƒ€ ๋ฐฉ •ˆ˜ Šน ••œ ‚ผ๊ฐ˜• ˜—ญ •ˆ— ž๋ฆฌžก•„•ผ •œ๋‹ค. ๋ฌผ๋ก  •„„œ ™•€ ฃผ–ด„ กฐ๊ด ๋‚ด—„œ ตœ๋Œ€•œ ฐ ›ƒ„ ๋งŒ๋“ค๊ณ  ‹ถ–ด•œ๋‹ค.

๋ฉ€๋ฆฐด  ‹ฌ„ ๋จนœผ๋Ÿฌ ๋‚˜๊ฐ„ ‚ฌด— •ด๊ฐ€ ๋น„ถ”๋Š” ˜—ญ— ๋“ค–ด๊ฐˆ ˆ˜ žˆ๋Š” ๊ฐ€žฅ ฐ ›ƒ˜ ๋ฐ˜ง€๋ฆ„„ ๊ณ„‚ฐ•˜๋Š” ”„๋กœ๊ทธ๋žจ„ ๋งŒ๋“ค–ด•ผ •œ๋‹ค.

Input

…ŒŠคŠธ ผ€ดŠค˜ ๊ฐœˆ˜—๋Š”  œ•œด —†œผ๋ฉฐ, ๊ฐ …ŒŠคŠธ ผ€ดŠค๋งˆ๋‹ค ‚ผ๊ฐ˜•˜ „ธ ๋ณ€˜ ๊ธธด๋ฅผ ๋‚˜ƒ€๋‚ด๋Š” ‹คˆ˜ „ธ ๊ฐœ(a,b,c)๊ฐ€ ž…๋ ฅ๋œ๋‹ค. –ด๋–ค ๋ณ€˜ ๊ธธด๋„ 1,000,000„„˜ง€ •Šœผ๋ฉฐ, max(a,b,c) โ‰ค (a+b+c)/2 ๋ผ๊ณ  ๊ฐ€ ••ด๋„ ๋œ๋‹ค.

ŒŒผ ๋— ๋‹ค๋‹ค๋ฅผ ๋•Œ๊นŒง€ ๊ณ„† ž…๋ ฅ„ ๋ฐ›๋Š”๋‹ค.

output

๊ฐ …ŒŠคŠธ ผ€ดŠค๋งˆ๋‹ค ๋‹คŒ๊ณผ ๊ฐ™€ ๊ฒฐ๊ณผ๋ฅผ ถœ๋ ฅ•œ๋‹ค.
{{| The radius of the round table is: r |}}
—ฌ๊ธฐ—„œ r€  •˜ค— •ด๊ฐ€ ๋น„ถ”๋Š” ˜—ญ— ๋“ค–ด๊ฐˆ ˆ˜ žˆ๋Š” ›ƒ˜ ตœ๋Œ€ ๋ฐ˜ง€๋ฆ„ด๋ฉฐ, †Œˆ˜  …‹งธ ž๋ฆฌ๊นŒง€ ๋ฐ˜˜ฌ๋ฆผ•œ ๊ฐ’„ ถœ๋ ฅ•œ๋‹ค.

Sample Input

{{| 12.0 12.0 8.0 |}}

Sample Output

{{| The radius of the round table is: 2.828 |}}

’€ด

ž‘„ž ‚ฌšฉ–ธ–ด ๊ฐœ๋ฐœ‹œ๊ฐ„ ฝ”๋“œ
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๋ฌธ œ๋ถ„๋ฅ˜ ๊ฒฝ‹œ๋Œ€šŒค€๋น„๋ฐ˜
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