Problem 52462. Easy Sequences 1: Find the index of an element
Solution Stats
Problem Comments
-
8 Comments
@Ramon, if you are submitting a question on Cody for everybody to solve, it is recommended you put atleast 3 test suites, mostly so that it encourages people to learn and not hard code solutions.
Thanks, @Dyuman. There are now 4 test suites.
@Ramon, Wonderful!
-a+(1-(-1)^(n+1))/2 will be negative in the 4th test. I believe it should be: index(a-(1-(-1)^(n+1))/2).
This works fine in my MATLAB software. But not here.
Any comments, please?
function n = index(a)
for idx = 1:1000
b = idx*((-1)^(idx^3+1));
if b==a
break
else
continue
end
end
n=idx;
end
Because you are not doing what the question is asking
I think the last test case is wrong
Rahul Gulia, in the last test, there will be numbers greater than 1000. And the last test is not wrong. Just remember that indexes are always positive (I had trouble with that also, we are so focused on the sequence that we forget that indexes can't be negative).
Solution Comments
Show commentsProblem Recent Solvers44
Suggested Problems
-
Extract leading non-zero digit
2132 Solvers
-
Project Euler: Problem 2, Sum of even Fibonacci
2288 Solvers
-
We love vectorized solutions. Problem 1 : remove the row average.
818 Solvers
-
358 Solvers
-
Calculate the average value of the elements in the array
1168 Solvers
More from this Author116
Problem Tags
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!