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Question In an N by N square grid, each cell is either empty (0) or blocked (1). A clear path from top-left to bottom-right has length k if and only i 阅读全文
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Question Given an array of non-negative integers, you are initially positioned at the first index of the array. Each element in the array represents y 阅读全文
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Question Winter is coming! Your first job during the contest is to design a standard heater with fixed warm radius to warm all the houses. Now, you ar 阅读全文
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Question Given an array of citations sorted in ascending order (each citation is a non-negative integer) of a researcher, write a function to compute 阅读全文