15 lines
443 B
Plaintext
15 lines
443 B
Plaintext
given = [ 'ABCD';'CABD';'ACDB';'DACB'; ...
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'BCDA';'ACBD';'ADCB';'CDAB'; ...
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'DABC';'BCAD';'CADB';'CDBA'; ...
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'CBAD';'ABDC';'ADBC';'BDCA'; ...
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'DCBA';'BACD';'BADC';'BDAC'; ...
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'CBDA';'DBCA';'DCAB' ];
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val = 4.^(3:-1:0)';
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there = 1+(toascii(given)-toascii('A'))*val;
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every = 1+perms(0:3)*val;
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bits = zeros(max(every),1);
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bits(every) = 1;
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bits(there) = 0;
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missing = dec2base(find(bits)-1,'ABCD')
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