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Dermuba Triangle

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

About DermubaTriangle

๋”๋ฎค๋ฐ” ‚ผฐง€๋Œ€๋Š” ง€˜ค๋ฉ”Šธ๋ฆฌ•„ €•˜˜ —˜-ŒฉŠค –‰„— žˆ๋Š”๋ฐ,  „šฐฃผ œผ๋กœ œ ๋ช…•œ ‰‰•œ ‚ผฐง€๋Œ€๋‹ค. ๋”๋ฎค๋ฐ” ‚ฌ๋žŒ๋“ค€ ฐ ๋ณ€ •™••˜ฒŒ 1km •‚ผฐ˜• ˜—ญ—„œ ‚ฐ๋‹ค. ‘€ ๋ชจ๋‘  •‚ผฐ˜•˜ ™ธ‹— žˆ๋‹ค. ฐ ‘—๋Š” ๋‹Œณผ ฐ™€ ‹œผ๋กœ ๋ฒˆ˜ฐ€ ๋ถ™–ดžˆ๋‹ค.
http://online-judge.uva.es/p/v102/p10233.gif
๋”๋ฎค๋ฐ” ‚ฌ๋žŒ๋“คด ๋‹ค๋ฅธ ‘— ๋ฐฉ๋ฌธ• •Œ๋Š” žธฐ ‘—„œ ๋ชฉ ง€นŒง€ ด๋ฅด๋Š” œ‹ฒฝ๋กœ๋ฅผ ๋”ฐ๋„œ ด๋™•œ‹ค. ด๋•Œ œ‹ฒฝ๋กœ๋Š” ธ ๋‘ ‘„ —ฐฒฐ•˜๋Š” ง„  ฑฐ๋ฆฌ๋ฅผ ˜๋ฏธ•œ‹ค. ‘˜ ๋ฒˆ˜ฐ€ ฃผ–ดกŒ„•Œ ธ ๋‘ ‘ ‚ฌ˜ œ‹ฒฝ๋กœ˜ ธธด๋ฅผ „‚ฐ•˜๋Š” ”„๋กœธ๋žจ„ ๋งŒ๋“ค–ด๋ณดž.

Input

—ฌ๋Ÿฌ …ŒŠคŠธ ผ€Šคฐ€ ž…๋ ฅ๋  ˆ˜ žˆœผ๋ฉฐ, ฐ …ŒŠคŠธ ผ€Šค๋งˆ๋‹œ๋ฐœ•˜๋Š” ‘˜ ๋ฒˆ˜™€ ๋„ฐฉ•˜๋Š” ‘˜ ๋ฒˆ˜ธ๋ฅผ ๋‚˜ƒ€๋‚ด๋Š”  •ˆ˜ nณผ mž…๋ ฅ๋œ‹ค. 0โ‰คn, mโ‰ค2,147,283,647ด๋ฉฐ, ด ๋‘  •ˆ˜๋Š” ฐ™€ „— ž…๋ ฅ๋œ‹ค.

Output

ž…๋ ฅ๋œ ฐ „๋งˆ๋‹ค ๋‘ ‘ ‚ฌ˜ œ‹ฑฐ๋ฆฌ๋ฅผ œ •œ‹ค. ฑฐ๋ฆฌ๋Š” ‚ฌ๋กœ๋ฏธ„ฐ ๋‹œ„๋กœ, †Œˆ˜  …‹งธ ž๋ฆฌนŒง€ ๋ฐ˜˜ฌ๋ฆผ•œ ฐ’„ œ •œ‹ค.

Sample Input

{{| 0 7
2 8
9 10
10 11 |}}

Sample Output

{{| 1.528
1.528
0.577
0.577 |}}

’€

ž‘„ž ‚ฌšฉ–ธ–ด œ๋ฐœ‹œ„ ฝ”๋“œ
น€ƒ„ C++ •„ง •ˆ๋จ DermubaTriangle/น€ƒ„
—ˆค€ˆ˜ C++ ? DermubaTriangle/—ˆค€ˆ˜
กฐ˜„ƒœ C++ ? DermubaTriangle/กฐ˜„ƒœ
๋ฌธ๋ณดฐฝ C++ 2‹œ„ DermubaTriangle/๋ฌธ๋ณดฐฝ
•˜ธฐ›… C++ 3‹œ„ DermubaTriangle/•˜ธฐ›…

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