20 lines
547 B
C#
20 lines
547 B
C#
using System;
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using System.Linq;
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public class Test
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{
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public static void Main()
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{
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var input = new [] {"ABCD","CABD","ACDB","DACB","BCDA",
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"ACBD","ADCB","CDAB","DABC","BCAD","CADB",
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"CDBA","CBAD","ABDC","ADBC","BDCA","DCBA",
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"BACD","BADC","BDAC","CBDA","DBCA","DCAB"};
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int[] values = {0,0,0,0};
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foreach (string s in input)
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for (int i = 0; i < 4; i++)
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values[i] ^= s[i];
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Console.WriteLine(string.Join("", values.Select(i => (char)i)));
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}
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}
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