Problem 139. Determine if a Given Number is a Triangle Number

Created by @bmtran (Bryant Tran)

Solve Later

Description:

Determine if the elements of an input array are triangle numbers and return the result as an array with the same dimensions as the input.

Example:

    Input  = [ 1 2 3 ];
    Output = [ 1 0 1 ];

Solve

Solution Stats

999 Solutions
291 Solvers

Last Solution submitted on Mar 29, 2020

Last 200 Solutions

Problem Comments

Solution Comments

Solution 2003102

1 Comment

1 Comment

Bob Lin on 5 Nov 2019

Watch out! Martix size!

Solution 1102049

2 Comments

2 Comments

Lucinda King on 11 Jan 2017

This works in Matlab but not here? It fails on Test 3, but when I use the same value of x and the same function in Matlab it works...

Jan Orwat on 13 Jan 2017

Your output y is a row vector (or scalar), but in 3'rd test it should be a column vector. Predefine y first with the same size as x.

Solution 549639

1 Comment

1 Comment

Ramoflaple on 10 Jul 2015

good solution

Problem Recent Solvers291

Problem Tags

triangle numbers

Problem 139. Determine if a Given Number is a Triangle Number

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers291

Suggested Problems

More from this Author56

Problem Tags

Problem 139. Determine if a Given Number is a Triangle Number

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers291

Suggested Problems

More from this Author56

Problem Tags

Players