摘要： 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 should 阅读全文

摘要： 题目: Find the kth largest element in an unsorted array. Note that it is the kth largest element in the sorted order, not the kth distinct element. For 阅读全文

摘要： 题目： Note: This is an extension of House Robber. After robbing those houses on that street, the thief has found himself a new place for his thievery so 阅读全文