davidnyc

摘要： https://leetcode.com/problems/combination-sum-ii/description/Given a collection of candidate numbers (C) and a target number (T), find all unique comb 阅读全文

摘要： https://leetcode.com/problems/combination-sum/description/ Given a set of candidate numbers (C) (without duplicates) and a target number (T), find all 阅读全文

摘要： https://leetcode.com/problems/combinations/description/Given two integers n and k, return all possible combinations of k numbers out of 1 ... n.For example,If n = 4 and k = 2, a solution is:[ [2,4], ... 阅读全文