52 lines
766 B
D
52 lines
766 B
D
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import std.algorithm;
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import std.uni;
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import std.array;
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import std.file;
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import std.stdio;
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import std.range;
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import std.conv;
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import std.string;
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void main()
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{
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readText("input").calculateTotalNumberOfQuestions.writeln;
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}
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auto setIntersectionRoR(RoR)(RoR ror)
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{
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assert(!ror.empty);
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return ror.map!(to!(dchar[]))
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.reduce!((r1, r2) => r1.setIntersection(r2).array);
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}
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auto calculateTotalNumberOfQuestions(string input)
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{
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return input.splitter("\n\n").array.map!((group) {
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return group.splitter.map!(person => person.representation.dup.sort.array.assumeUTF)
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.setIntersectionRoR.count;
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}).sum;
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}
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unittest
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{
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auto input = `abc
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a
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b
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c
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ab
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ac
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a
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a
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a
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a
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b
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yx`;
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assert(input.calculateTotalNumberOfQuestions == 8);
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}
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