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triangular-number

14 posts

Paths of Triangular Number in a Binary Tree

Last Updated: 23 July 2025

Given a Binary Tree, the task is to output the Count of the number of paths formed by only a Triangular number. Xth Triangular number is the sum of the first X natural num...read more

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Geeks Premier League

Preorder Traversal

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Geeks Premier League 2023

Find the XOR of smallest and largest triangular number in a given range

Last Updated: 22 August 2023

Given a range, find the XOR of the smallest and largest triangular numbers within that range.A triangular number is a number that can be represented as the sum of consecut...read more

Data Structures

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Replace every node in a linked list with its closest triangular number

Last Updated: 23 July 2025

Given a singly linked list, the task is to replace every node with its closest triangular number.Examples:Input: 3 - 9 - 21 - 25 - NULLOutput: 3 - 10 - 21 - 28 - NULLExpla...read more

Data Structures

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Sum of all possible strings obtained by removal of non-empty substrings

Last Updated: 23 July 2025

Given numerical string str consisting of N integers, the task is to find the sum of all possible resulting strings after removing non-empty substrings.Examples:Input: str ...read more

Pattern Searching

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Index of smallest triangular number with N digits

Last Updated: 15 July 2025

Given a number N, the task is to find the index of smallest triangular number with N digits.A number is termed as a triangular number if we can represent it in the form of...read more

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Minimum time to reach a point with +t and -t moves at time t

Last Updated: 29 November 2023

Given a positive coordinate 'X' and you are at coordinate '0', the task is to find the minimum time required to get to coordinate 'X' with the following move :At time 't',...read more

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First triangular number whose number of divisors exceeds N

Last Updated: 11 July 2025

Given a number N, find the first triangular number whose number of divisors exceeds N. Triangular numbers are sums of natural numbers, i. e., of the form x*(x+1)/2. First ...read more

triangular-number

Centered triangular number in PL/SQL

Last Updated: 11 July 2025

Prerequisite - PL/SQL introductionIn PL/SQL code groups of commands are arranged within a block. A block group related declarations or statements. In declare part, we decl...read more

triangular-number

Sum of Sums first n natural numbers

Last Updated: 11 July 2025

Given a positive integer n. The task is to find the sum of the sum of first n natural number.Examples:Input: n = 3Output: 10Explanation:Sum of first natural number: 1Sum o...read more

triangular-number

Centered triangular number

Last Updated: 29 March 2023

Given an integer n, find the nth Centered triangular number.Centered Triangular Number is a centered polygonal number that represents a triangle with a dot in the center a...read more

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triangular-number

Squared triangular number (Sum of cubes)

Last Updated: 11 July 2025

Given a number s (1 = s = 1000000000). If s is sum of the cubes of the first n natural numbers then print n, otherwise print -1.First few Squared triangular number are 1, ...read more

triangular-number

Program to print triangular number series till n

Last Updated: 08 February 2023

A triangular number or triangle number counts objects arranged in an equilateral triangle, as in the diagram on the right. The n-th triangular number is the number of dots...read more

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triangular-number

Sum of the series 1, 3, 6, 10... (Triangular Numbers)

Last Updated: 16 August 2022

Given n, no of elements in the series, find the summation of the series 1, 3, 6, 10....n. The series mainly represents triangular numbers.Examples:Input: 2Output: 4Explana...read more

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Triangular Numbers

Last Updated: 23 July 2025

A number is termed a triangular number if we can represent it in the form of a triangular grid of points such that the points form an equilateral triangle and each row con...read more

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