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  2. LeetCode - Wikipedia

    en.wikipedia.org/wiki/LeetCode

    LeetCode LLC, doing business as LeetCode, is an online platform for coding interview preparation. The platform provides coding and algorithmic problems intended for users to practice coding . [ 1 ] LeetCode has gained popularity among job seekers in the software industry and coding enthusiasts as a resource for technical interviews and coding ...

  3. Scrabble variants - Wikipedia

    en.wikipedia.org/wiki/Scrabble_variants

    For example, MPORCTEU is a valid play in Clabbers because it is an anagram of COMPUTER. The increased ability to play parallel to pre-existing words makes for much higher scores. A variant of this is Multi-Anagram Clabbers, in which players receive the basic score for any set of letters played multiplied by the number of valid anagrams for that ...

  4. Anagram dictionary - Wikipedia

    en.wikipedia.org/wiki/Anagram_dictionary

    The first such anagram dictionary was The Crossword Anagram Dictionary by R.J. Edwards [1] In the other kind of anagram dictionary, words are categorized into equivalence classes that consist of words with the same number of each kind of letter. Thus words will only appear when other words can be made from the same letters.

  5. Derangement - Wikipedia

    en.wikipedia.org/wiki/Derangement

    In this case the problem reduces to n − 2 people and n − 2 hats, because P 1 received h i ' s hat and P i received h 1 's hat, effectively putting both out of further consideration. For each of the n − 1 hats that P 1 may receive, the number of ways that P 2 , ..., P n may all receive hats is the sum of the counts for the two cases.

  6. Eight queens puzzle - Wikipedia

    en.wikipedia.org/wiki/Eight_queens_puzzle

    There are 92 solutions. The problem was first posed in the mid-19th century. In the modern era, it is often used as an example problem for various computer programming techniques. The eight queens puzzle is a special case of the more general n queens problem of placing n non-attacking queens on an n×n chessboard.

  7. List of geographic anagrams and anadromes - Wikipedia

    en.wikipedia.org/wiki/List_of_geographic...

    These are geographic anagrams and anadromes. Anagrams are rearrangements of the letters of another name or word. Anadromes (also called reversals or ananyms) are other names or words spelled backwards. Technically, a reversal is also an anagram, but the two are derived by different methods, so they are listed separately.

  8. Training, validation, and test data sets - Wikipedia

    en.wikipedia.org/wiki/Training,_validation,_and...

    A training data set is a data set of examples used during the learning process and is used to fit the parameters (e.g., weights) of, for example, a classifier. [9] [10]For classification tasks, a supervised learning algorithm looks at the training data set to determine, or learn, the optimal combinations of variables that will generate a good predictive model. [11]

  9. Twelvefold way - Wikipedia

    en.wikipedia.org/wiki/Twelvefold_way

    In combinatorics, the twelvefold way is a systematic classification of 12 related enumerative problems concerning two finite sets, which include the classical problems of counting permutations, combinations, multisets, and partitions either of a set or of a number.

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