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Algo Geek

259+ posts

Lexicographically smallest string by repeatedly moving one of first K characters to end

Last Updated: 14 March 2023

Given a string str and a positive integer K. In an operation, you can select a character from the first K characters and move it to the end, the task is to find the smalle...read more

Strings

Competitive Programming

TrueGeek

Algo Geek

DSA

Minimize count of peaks and troughs in given Array after at most one replacement

Last Updated: 29 July 2022

Given an array arr[] containing N positive integers, the task is to minimize the total count of peaks (elements having greater value than both the neighbours) and troughs ...read more

Maximum distance between Peaks in given Linked List

Last Updated: 30 August 2024

Given a linked list of length n, the task is to determine the maximum distance between two consecutive peaks of the given linked list. A peak is a node with a value greate...read more

Reduce given Array to 0 by maximising sum of chosen elements

Last Updated: 06 March 2023

Given an array arr[] containing N positive integers, the task is to maximize the array sum when after every sum operation all the remaining array elements decrease by 1.No...read more

Find sum of first N terms of the series 5, 11, 19, 29, 41, . . .

Last Updated: 12 July 2022

Given an integer N. The task is to find the sum of the first N terms of the series 5, 11, 19, 29, 41, . . . till Nth term.Examples:Input: N = 5Output: 105Explanation: 5 + ...read more

Find all pairwise sum possible using elements at opposite ends with minimum replacements

Last Updated: 23 February 2022

Given an array arr[] of even length N and an integer K denoting the range of numbers in the array i.e. the numbers in the array are in the range [1, K]. The task is to fin...read more

Find index of pair among given pairs with just greater average

Last Updated: 14 December 2022

Given an array of pairs arr[] of size N where the first value of all the pairs are distinct. For each pair of the given array find the index of another pair which have an ...read more

Maximum count of unique index 10 or 01 substrings in given Binary string

Last Updated: 09 February 2022

Given a binary string str of length N, the task is to count the maximum number of adjacent pairs of form "01" or "10" that can be formed from the given binary string when ...read more

Find nth term of the series 3, 8, 15, 24, . . .

Last Updated: 20 August 2022

Given an integer N, the task is to find the Nth term of the series3, 8, 15, 24, . . .till Nth termExamples:Input: N = 5Output: 35Input: N = 6Output: 48Approach:From the gi...read more

Find sum of N terms of series 1, (1+4) , (1+4+4^2), (1+4+4^2+4^3), .....

Last Updated: 20 August 2022

Given a positive integer, N. Find the sum of the first N term of the series-1, (1+4), (1+4+42), (1+4+42+43), ...., till N termsExamples:Input: N = 3Output: 27Input: N = 5O...read more

Find nth term of series 3, 11, 31, 69, . . . . .

Last Updated: 20 August 2022

Given an integer N, the task is to find the Nth term of the series3, 11, 31, 69, . . . . . till Nth term.Examples:Input: N = 3Output: 31Input: N = 6Output: 223Approach:Fro...read more

Find the Nth term of the series 3,10,21,36,55...

Last Updated: 19 April 2023

Given a positive integer N, the task is to find the Nth term of the series3, 10, 21, 36, 55...till N termsExamples:Input: N = 4Output: 36Input: N = 6Output: 78Approach:Fro...read more

Find nth term of 0, 9, 24, 45, . . . .

Last Updated: 01 February 2022

Given a natural number N, the task is to find the Nth term of the series0, 9, 24, 45, . . . .till N termsExamples:Input: N = 4Output: 45Input: N = 6Output: 105Approach:Fro...read more

Find nth term of the series 2, 8, 18, 32, 50, . . . .

Last Updated: 23 June 2022

Given an integer N, the task is to find the Nth term of the series2, 8, 18, 32, 50, ....till N termsExamples:Input: N = 4Output: 32Input: N = 6Output: 72Approach:From the ...read more

Minimize total cost of picking K unique subsequences from given string

Last Updated: 02 March 2022

Given a string S of length N and a positive integer K, the task is to find the minimum total cost of picking K unique subsequence of the given string S such that the cost ...read more

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