$\endgroup$ – Dmitri Urbanowicz Jul 8 '18 at 14:14 add a comment | Your Answer It contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview … This is not done by simple combinatorics (I know the formulas and it doesn't work here). The first approach which comes to mind is brute force .In this approach we are using a set to store all the distinct substrings. I was solving DISTINCT SUBSTRING (given a string, we need to find the total number of its distinct substrings). size of corresponding trie). We can convert this complexity to n^3 by using an array instead of a set . Longest Substring with At Most K Distinct Characters - [Hard] Problem description. I am using trie of suffixes to solve it. For example, given s = "abcba" and k = 2, the longest substring with k distinct … Then T test cases follow. 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). Hard #5 Longest Palindromic Substring. Given an integer k and a string s, find the length of the longest substring that contains at most k distinct characters. Also, the space consumed is very large, at 4093M. Medium #4 Median of Two Sorted Arrays. ... #3 Longest Substring Without Repeating Characters. (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. 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. 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. Input: The first line of input contains an integer T, denoting the number of test cases. Medium #6 ZigZag Conversion. Given a string of length N of lowercase alphabet characters. The task is to complete the function countDistinctSubstring(), which returns the count of total number of distinct substrings of this string.. I am passing the test cases, but getting TLE when I submit. 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. 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 - … Medium #7 Reverse Integer. Number of distinct substrings is just sum of lengths of its edges (i.e. Since this is a discussion, I will just put here: The main problem is counting unique substrings. 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