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三角形
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| ## 三角形 | |
| ## http://rubyfiddle.com/riddles/6bad3 | |
| a = [2, 3, 4, 5, 10] | |
| ans = 0 | |
| a.combination(3){|v,j,k| | |
| if k < (v+j) | |
| if ans < (v+j+k) | |
| ans = (v+j+k) | |
| end | |
| end | |
| } | |
| puts ans |
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