Problem 729. Flag largest magnitude swings as they occur
You have a phenomenon that produces strictly positive or negative results.
delta = [1 -3 4 2 -1 6 -2 -7];
Marching through this list from beginning to end, mark a value with -1 if it is the greatest magnitude negative yet seen (strictly greater, not equal). Mark it with a one if it has the greatest magnitude in the positive direction (strictly greater, not equal). Just use a 0 if neither of these conditions have been met.
The result for the above example would be:
result = [1 -1 1 0 0 1 0 -1]
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Kevin Hellemans
on 18 Sep 2013
The phrasing might be a bit ambiguous, as magnitude swing could also be thought of as delta(i-1)-delta(i) instead of just delta(i). Nonetheless fun problem!
Abhishek Jain
on 16 Sep 2016
Nice question.
Abir Hasan
on 1 Aug 2018
Nice problem
Josh
on 7 Aug 2023
Agreed with first comment, it would be helpful to have more specificity with definition of magnitude "swing" ...perhaps the word "swing" is confusing because it implies some kind of reference point or change from one point to the next, when all that's being considered is the magnitude of each progressive value in comparison to previous max_magnitudes(+ and -)
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