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Five programming problems every Software Engineer should be able to solve in less than 1 hour
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| def f *args | |
| args.map(&:to_s).permutation.map { |x| x.join.to_i }.max | |
| end |
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| def f *args | |
| ["", "+", "-"].repeated_permutation(args.size-1).each do |op| | |
| args.map(&:to_s).zip(op).join.tap { |s| puts s if eval(s) == 100 } | |
| end | |
| end |
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http://www.softantenna.com/wp/software/5-programming-problems/