Problem 731. Given a window, how many subsets of a vector sum positive

Created by Doug Hull

Solve Later

Given a vector:

[1 0 -1 3 2 -3 1]

and a window of 2,

A sliding window would find:

   1 + 0 =  1
   0 - 1 = -1
  -1 + 3 =  2
   3 + 2 =  5
   2 - 3 = -1
  -3 + 1 = -2

Meaning that three of the windows were positive.

Given a vector and a window, how many of the windows sum to be positive, not zero or negative?

Solve

Solution Stats

2410 Solutions
856 Solvers

Last Solution submitted on Jan 06, 2025

Last 200 Solutions

Problem Comments

5 Comments

5 Comments

Show 2 older comments

Richard Zapor on 10 Jun 2012

I think test suite 3 produces 4 positives, not 3.

Aurelien Queffurust on 11 Jun 2012

I agree with the above comments

Doug Hull on 11 Jun 2012

Oops. Fixed. thank you.

Pavan Toraty on 25 Oct 2014

Test suite 3 doesn't seem to be correct. Total windows possible in this case is 2. How can number of positive windows be greater than that. Someone please clarify.

Shalexis Casimiro on 20 Dec 2017

cool

Solution Comments

Show comments

Problem Recent Solvers856

Problem Tags

Community Treasure Hunt

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

Start Hunting!

Problem 731. Given a window, how many subsets of a vector sum positive

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers856

Suggested Problems

More from this Author51

Problem Tags

Community Treasure Hunt

Problem 731. Given a window, how many subsets of a vector sum positive

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers856

Suggested Problems

More from this Author51

Problem Tags

Community Treasure Hunt

Players