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Isomorphic StringsGiven two stringssandt, determine if they are isomorphic.Two strings are isomorphic if the characters inscan be replaced to gett.All... 阅读全文
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Contains Duplicate IIGiven an array of integers and an integerk, find out whether there are two distinct indicesiandjin the array such thatnums[i] = n... 阅读全文
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Valid SudokuDetermine if a Sudoku is valid, according to:Sudoku Puzzles - The Rules.The Sudoku board could be partially filled, where empty cells are ... 阅读全文
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Valid AnagramGiven two stringssandt, write a function to determine iftis an anagram ofs.For example,s= "anagram",t= "nagaram", return true.s= "rat",t=... 阅读全文
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Contains DuplicateGiven an array of integers, find if the array contains any duplicates. Your function should return true if any value appears at leas... 阅读全文