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The Hamming distance between two integers is the number of positions at which the corresponding bits are different.Now your job is to find the total Hamming distance between all pairs of the given... 阅读全文
posted @ 2018-01-19 23:07
xiejunzhao
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You are given n pairs of numbers. In every pair, the first number is always smaller than the second number. Now, we define a pair (c, d) can follow another pair (a, b) if and only if b [3,4] Note:T... 阅读全文
posted @ 2018-01-19 23:06
xiejunzhao
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There is a room with n lights which are turned on initially and 4 buttons on the wall. After performing exactly m unknown operations towards buttons, you need to return how many different kinds of st... 阅读全文
posted @ 2018-01-19 23:05
xiejunzhao
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Determine if a Sudoku is valid, according to: Sudoku Puzzles - The Rules.The Sudoku board could be partially filled, where empty cells are filled with the character '.'.A partially filled sudoku which... 阅读全文
posted @ 2018-01-19 23:04
xiejunzhao
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