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D. Fixed Prefix Permutations You are given $n$ permutations $a_1, a_2, \dots, a_n$, each of length $m$. Recall that a permutation of length $m$ is a s 阅读全文
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Rank Transform of a Matrix Given an m x n matrix , return a new matrix answer where answer[row][col] is the rank of matrix[row][col] . The rank is an 阅读全文
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Minimum Cost to Split an Array You are given an integer array nums and an integer $k$. Split the array into some number of non-empty subarrays. The co 阅读全文
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B. Emordnilap A permutation of length $n$ is an array consisting of $n$ distinct integers from $1$ to $n$ in arbitrary order. For example, $[2,3,1,5,4 阅读全文
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C. Quiz Master A school has to decide on its team for an international quiz. There are $n$ students in the school. We can describe the students using 阅读全文