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The Knights Of The Round Table

 ฌธ œŠ”

ธ๊ธฐ„:A(A,B,C), „ฑ๊ณตฅ :†ต(‚ฎŒ,†ต,†’Œ),  ˆฒจ:2(1~4)

TheKnightsOfTheRoundTable

•„„œ ™• ฒœžฅ— ‚ผ๊ฐ˜• ฐฝ žˆŠ” ฐฉ— ›ƒ„ †“„ ๊ณ„š„ „ธšฐ๊ณ  žˆ‹ค. ๊ทธŠ” –‡น› ›ƒ œ„— น„ถ”๊ฒŒ •˜๊ณ  ‹ถ‹ค. Šนžˆ  •˜ค— ƒœ–‘ ฐ”กœ จธฆฌ œ„— žˆ„ •ŒŠ” ›ƒ  „— –‡น› น„ถ”„ก •˜ ค๊ณ  •œ‹ค.

๊ทธž˜„œ ๊ทธ ›ƒ€ ฐฉ •ˆ˜ Šน ••œ ‚ผ๊ฐ˜• ˜—ญ •ˆ— žฆฌžก•„••œ‹ค. ฌผก  •„„œ ™•€ ฃผ–ง„ กฐ๊ฑ ‚—„œ ตœŒ€•œ ฐ ›ƒ„ งŒ“ค๊ณ  ‹ถ–•œ‹ค.

€ฆฐ  ‹ฌ„ จนœผŸฌ ‚˜๊ฐ„ ‚ฌ— •๊ฐ€ น„ถ”Š” ˜—ญ— “ค–๊ฐˆ ˆ˜ žˆŠ” ๊ฐ€žฅ ฐ ›ƒ˜ ฐ˜€ฆ„„ ๊ณ„‚ฐ•˜Š” ”„กœ๊ทธžจ„ งŒ“ค–••œ‹ค.

Input

…ŒŠคŠธ €Šค˜ ๊ฐœˆ˜—Š”  œ•œ —†œผฉฐ, ๊ฐ …ŒŠคŠธ €Šคงˆ‹ค ‚ผ๊ฐ˜•˜ „ธ €˜ ๊ธธฅผ ‚˜ƒ€‚Š” ‹คˆ˜ „ธ ๊ฐœ(a,b,c)๊ฐ€ ž… ฅœ‹ค. ––ค €˜ ๊ธธ„ 1,000,000„ „˜€ •Šœผฉฐ, max(a,b,c) โ‰ค (a+b+c)/2 ผ๊ณ  ๊ฐ€ ••„ œ‹ค.

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

output

๊ฐ …ŒŠคŠธ €Šคงˆ‹ค ‹คŒ๊ณผ ๊ฐ™€ ๊ฒฐ๊ณผฅผ ถœ ฅ•œ‹ค.
{{| The radius of the round table is: r |}}
—ฌ๊ธฐ—„œ r€  •˜ค— •๊ฐ€ น„ถ”Š” ˜—ญ— “ค–๊ฐˆ ˆ˜ žˆŠ” ›ƒ˜ ตœŒ€ ฐ˜€ฆ„ฉฐ, †Œˆ˜  …‹งธ žฆฌ๊นŒ€ ฐ˜˜ฌฆผ•œ ๊ฐ’„ ถœ ฅ•œ‹ค.

Sample Input

{{| 12.0 12.0 8.0 |}}

Sample Output

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

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ž‘„ฑž ‚ฌšฉ–ธ– ๊ฐœฐœ‹œ๊ฐ„ ฝ”“œ
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