Sofdor Ali and Bracket Sequence

Sofdor Ali has invented a new game. He asked his assistant Jong Bahadur ( who happens to be a monkey...

Smallest Subarray

You are given an array A of N integers A1, A2, A3, …, AN . If we select two indices (1 ≤ i ≤ j ≤ N) ...

Distinctness

A substring of string S is another string S’ which occurs in string S. For example: S = aaba and one...

Unique Substrings Query

You will be given a string s of length n. Consider substring s[i, n] (where i is the starting posit...

Simple As a Substring!

Many years have passed after Simba’s death. The jungle has a new lion cub born just a few hours ago....

The Story of Stringland

The king of Stringland is employing an elite force of undercover agents to protect the kingdom from ...