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Given a circular array (the next element of the last element is the first element of the array), print the Next Greater Number for every element. The 阅读全文
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You are given two arrays (without duplicates) nums1 and nums2 where nums1’s elements are subset of nums2. Find all the next greater numbers for nums1' 阅读全文
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You have a lock in front of you with 4 circular wheels. Each wheel has 10 slots: '0', '1', '2', '3', '4', '5', '6', '7', '8', '9'. The wheels can rota 阅读全文
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You can keep inputting the password, the password will automatically be matched against the last n digits entered. For example, assuming the password 阅读全文
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International Morse Code defines a standard encoding where each letter is mapped to a series of dots and dashes, as follows: "a"maps to ".-", "b" maps 阅读全文
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In a given integer array A, we must move every element of A to either list B or list C. (B and C initially start empty.) Return true if and only if af 阅读全文
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In a directed graph, we start at some node and every turn, walk along a directed edge of the graph. If we reach a node that is terminal (that is, it h 阅读全文