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Help me! Permutation

Правка en1, от ylvis, 2016-11-26 21:31:00

Hello everyone, I have a question. How can you tell how many different permutations a string has if it has even repeated elements?

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en2 Английский ylvis 2016-11-26 21:32:58 105
en1 Английский ylvis 2016-11-26 21:31:00 150 Initial revision (published)