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Advent of Code 2017 Day 4
int HighEntropyPassphrasesPartOne(string[] passPhrases)
{
return DoHighEntropyPassphrases(passPhrases, w => w);
}
int HighEntropyPassphrasesPartTwo(string[] passPhrases)
{
return DoHighEntropyPassphrases(passPhrases, w => string.Concat(w.OrderBy(c => c)));
}
int DoHighEntropyPassphrases(string[] passPhrases, Func<string, string> map)
{
return passPhrases.Count(words =>
{
var set = new HashSet<string>();
return words.Split(' ').All(word => set.Add(map(word)));
});
}
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