## count of distinct substrings using trie

Also, the space consumed is very large, at 4093M. This is not done by simple combinatorics (I know the formulas and it doesn't work here). It is also not done by double for-loops to add all possible strings to a set/list (less repeated ones), as that has to be done in O(n^2). Given a string S, count the number of distinct, non-empty subsequences of S. Since the result may be large, return the answer modulo 10^9 + 7. ... #3 Longest Substring Without Repeating Characters. Trie helps us to save all substrings in a compressed fashion, and it helps to find count of distinct substrings formed by a string and also allows us to count the frequency of each substrings … Given a string of length N of lowercase alphabet characters. It contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview … size of corresponding trie). This tutorial introduces two solutions to find all distinct palindromic substrings in a string. Since this is a discussion, I will just put here: The main problem is counting unique substrings. The task is to complete the function countDistinctSubstring(), which returns the count of total number of distinct substrings of this string.. Medium #4 Median of Two Sorted Arrays. The first approach which comes to mind is brute force .In this approach we are using a set to store all the distinct substrings. (Insert operation in set is causing the logn factor) ... Obviously some new substrings ending in c will appear. I know this has to be an easy select but I am having no luck figuring it out. I am passing the test cases, but getting TLE when I submit. Hard #5 Longest Palindromic Substring. For example, given s = "abcba" and k = 2, the longest substring with k distinct … A Computer Science portal for geeks. Each test case contains a string str. I am using trie of suffixes to solve it. Then T test cases follow. Description Take a string of lowercase alphabets only as input from user, and then count the number of distinct substrings of the string by using a trie. Medium #7 Reverse Integer. $\endgroup$ – Dmitri Urbanowicz Jul 8 '18 at 14:14 add a comment | Your Answer I was solving DISTINCT SUBSTRING (given a string, we need to find the total number of its distinct substrings). We can convert this complexity to n^3 by using an array instead of a set . Medium #6 ZigZag Conversion. Number of distinct substrings is just sum of lengths of its edges (i.e. Suffix trie 1.Dont use array in structure use map (to pass memory and tle) 2.every node we have distinct so count each and every node that we created on trie code Link(A.C): <-- snip - … Longest Substring with At Most K Distinct Characters - [Hard] Problem description. Input: The first line of input contains an integer T, denoting the number of test cases. 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