Largest int from concatenated ints: Difference between revisions
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<lang d>import std.stdio, std.algorithm, std.conv, std.array, permutations2; |
<lang d>import std.stdio, std.algorithm, std.conv, std.array, permutations2; |
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auto maxCat1(in int[] arr) pure { |
auto maxCat1(in int[] arr) pure @safe { |
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return arr.to!(string[]).permutations.map!join.reduce!max; |
return arr.to!(string[]).permutations.map!join.reduce!max; |
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} |
} |
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auto maxCat2(in int[] arr) pure nothrow { |
auto maxCat2(in int[] arr) pure nothrow @safe { |
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return arr.to!(string[]).sort!q{b ~ a < a ~ b}.join; |
return arr.to!(string[]).sort!q{b ~ a < a ~ b}.join; |
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} |
} |
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auto maxCat3(in int[] arr) { |
auto maxCat3(in int[] arr) /*pure nothrow @safe*/ { |
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immutable maxL = arr.reduce!max.text.length; |
immutable maxL = arr.reduce!max.text.length; |
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return arr.to!(string[]) |
return arr.to!(string[]) |
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