LeetCode 673 - Number of Longest Increasing Subsequence
LeetCode Problem 673 Difficulty: 🟡 Medium Topics: Array, Dynamic Programming, Binary Indexed Tree, Segment Tree Solution Problem Understanding The problem asks us to determine how many longest strictly increasing subsequences exist in a given integer array. A subsequence is formed by deleting zero or more elements without changing the relative order of the remaining elements. For example, from [1,3,5,4,7] , the subsequence [1,3,4,7] is valid because the order is preserved....