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【题目】 Given a collection of candidate numbers (candidates) and a target number (target), find all unique combinations in candidates where the candidate 阅读全文
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【题目】 Given a set of candidate numbers (candidates) (without duplicates) and a target number (target), find all unique combinations in candidates where 阅读全文
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【题目】 Given two words word1 and word2, find the minimum number of operations required to convert word1 to word2. You have the following 3 operations pe 阅读全文
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【题目】 There are a number of spherical balloons spread in two-dimensional space. For each balloon, provided input is the start and end coordinates of th 阅读全文
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【题目】 Find all possible combinations of k numbers that add up to a number n, given that only numbers from 1 to 9 can be used and each combination shoul 阅读全文
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【题目1】 Given an array of integers, find if the array contains any duplicates. Your function should return true if any value appears at least twice in t 阅读全文
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【题目】 There are N gas stations along a circular route, where the amount of gas at station i is gas[i]. You have a car with an unlimited gas tank and it 阅读全文