## Zigzag String

Concepts Used Strings Difficulty Level Easy Problem Statement (Simplified): For a given string S and number of rows R, we have to arrange each character on rows in a vertical...

## Convert Integer number to Roman Number

Concepts Used: Strings Difficulty Level: Medium Problem Statement (Simplified): For a given number between 0 and 4000, print out it's Roman Form. See original problem statement here Test Case: Input:...

## Tina loves A

Concepts Used: Strings, Basic Mathematics Difficulty Level: Easy Problem Statement (Simplified): Print the maximum length of string which can be formed such that the number of a is more than...

## Minimum number of operations to make string palindrome

Concepts Used Strings Difficulty Level Easy Problem Statement (Simplified): Convert given string into a palindrome by decreasing or increasing characters by their ASCII value, in minimum number of operations. Each...

## Find the missing number in sequence given as string

Concepts Used: String Difficulty Level: Medium Problem Statement (Simplified): Find the missing number in a given in a series as a string with no separator. The maximum length of the...

## FRACTION

Concepts Used Strings Difficulty Level Hard Problem Statement (Simplified): Print the decimal output of fraction of two given numbers and enclose the repeating part in decimal places in brackets. For...

## Number of Substrings Containing All Three Characters

Concepts Used Strings, Sliding Window Algorithm using two pointers Difficulty Level Medium Problem Statement (Simplified): Print the number of substrings containing all three characters i.e. a,b,c at least once in...

## Minimum Window Substring

Concepts Used Strings, Hashing Difficulty Level Hard Problem Statement (Simplified): Find the minimum size of the substring of string S which contains all the character from a given string T....

## Minus Minus is Plus

Concepts Used Strings Difficulty Level Medium Problem Statement (Simplified): Given two string S and T containing only - and +. Two - together can form a single +. If it...

## Minimum Number of Steps to Make Two Strings Anagram

Concepts Used Strings, Hashing Difficulty Level Medium Problem Statement (Simplified): For given two string, Print minimum number of steps to make them anagram. See original problem statement here Test Case...

## Form the Largest Number

Concepts Used Strings, Sorting Difficulty Level Hard Problem Statement (Simplified): Given an array of numbers, arrange them in such a way that they form the largest number on joining. See...

## Longest Palindromic Substring

Concepts Used Strings Difficulty Level Medium Problem Statement (Simplified): Find the longest palindromic substring in a given string and print the substring. See original problem statement here Test Cases: Input:...

## First character

Concepts Used String, Hashing Difficulty Level Easy Problem Statement (Simplified): Find the first non-repeating character in the string, print -1 if all characters are repeating. See original problem statement here...

## Distint Concat

Concepts Used String Difficulty Level Hard Problem Statement (Simplified): Find the total number of substrings which are the concatenation of the same strings, e.g.PP if formed by concatenating P twice....

## Code Characters

Concepts Used String Difficulty Level Easy Problem Statement (Simplified): Find the minimum length of substring, which on replacing with any other substring of the same length gives a string containing...

## Branches of Bytecode

Concepts Used String Difficulty Level Hard Problem Statement (Simplified): For given n strings and a separator s, print n/2 number of strings of equal length, by concatenating two substrings with...

## Aman and Math

Concepts Used Strings Difficulty Level Hard Problem Statement (Simplified): Find the maximum answer by evaluating the given string and putting a bracket anywhere in the string. See original problem statement...