Medium #4 Median of Two Sorted Arrays. Hard #5 Longest Palindromic Substring. For example, given s = "abcba" and k = 2, the longest substring with k distinct … 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. A Computer Science portal for geeks. This tutorial introduces two solutions to find all distinct palindromic substrings in a string. I know this has to be an easy select but I am having no luck figuring it out. Given a string of length N of lowercase alphabet characters. size of corresponding trie). Given an integer k and a string s, find the length of the longest substring that contains at most k distinct characters. I am passing the test cases, but getting TLE when I submit. ... #3 Longest Substring Without Repeating Characters. Input: The first line of input contains an integer T, denoting the number of test cases. $\endgroup$ – Dmitri Urbanowicz Jul 8 '18 at 14:14 add a comment | Your Answer Then T test cases follow. It contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview … 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. Medium #7 Reverse Integer. We can convert this complexity to n^3 by using an array instead of a set . 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 … Number of distinct substrings is just sum of lengths of its edges (i.e. Medium #6 ZigZag Conversion. I am using trie of suffixes to solve it. (Insert operation in set is causing the logn factor) ... Obviously some new substrings ending in c will appear. Each test case contains a string str. Longest Substring with At Most K Distinct Characters - [Hard] Problem description. Also, the space consumed is very large, at 4093M. 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 - … The task is to complete the function countDistinctSubstring(), which returns the count of total number of distinct substrings of this string.. This is not done by simple combinatorics (I know the formulas and it doesn't work here). Since this is a discussion, I will just put here: The main problem is counting unique substrings. I was solving DISTINCT SUBSTRING (given a string, we need to find the total number of its distinct substrings). 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). 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