James Pan

原题网址：https://leetcode.com/problems/increasing-triplet-subsequence/Given an unsorted array return whether an increasing subsequence of length 3 exists or not in the array.Formally the functio

原题网址：https://leetcode.com/problems/longest-increasing-subsequence/Given an unsorted array of integers, find the length of longest increasing subsequence.For example,Given [10, 9, 2, 5, 3,

原题网址：https://leetcode.com/problems/longest-consecutive-sequence/Given an unsorted array of integers, find the length of the longest consecutive elements sequence.For example,Given [100, 4,

原题网址：https://leetcode.com/problems/russian-doll-envelopes/You have a number of envelopes with widths and heights given as a pair of integers (w, h). One envelope can fit into another if and on