A-M baby
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11
Task/Gray-code/D/gray-code-3.d
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11
Task/Gray-code/D/gray-code-3.d
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import std.stdio, std.algorithm, std.range;
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string[] g(in uint n) /*pure nothrow*/ {
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return n ? g(n - 1).map!q{'0' ~ a}().array() ~
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g(n - 1).retro().map!q{'1' ~ a}().array()
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: [""];
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}
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void main() {
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writeln(g(4));
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}
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