Given a positive integer, x, return a positive integer, y, which is the xth term in the sequence [1 2 2 3 3 3...], in which one instance of the number 1 is followed by two instances of the number 2, followed by three instances of the number 3, and so on.

Example 1:

x = 5

y = 3

Example 2:

x = 105

y = 14

Solve

Solution Stats

83 Solutions

44 Solvers

Last Solution submitted on Feb 28, 2026

Last 200 Solutions

Problem Comments

Solution Comments

Show comments

Problem Recent Solvers44

Alexander Ross Matthew Bolyard lidong Lorenzo

Suggested Problems

More from this Author45

Problem Tags

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!