Problem 317. Find the stride of the longest skip sequence

Solution 1628855

Submitted on 16 Sep 2018

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A C on 16 Sep 2018

plot(a, 'b-', 'LineWidth', 2); or [~ , loc] = findpeaks(a);
works for matlab but I cannot get it work here.

goc3 on 19 Sep 2018

Cody doesn't support toolbox functions.

Test	Status	Code Input and Output
1	Fail	a = [1 5 3 11 7 2 4 9]; stride = 2; assert(isequal(skip_sequence_stride(a),stride)) Assertion failed.
2	Pass	a = [1:5:20 23:3:42 2:9:100]; stride = 9; assert(isequal(skip_sequence_stride(a),stride))
3	Pass	a = [2:2:22 13:17]; a = a(randperm(length(a))); stride = 2; assert(isequal(skip_sequence_stride(a),stride))
4	Fail	a = 37:5:120; a = a(randperm(length(a))); stride = 5; assert(isequal(skip_sequence_stride(a),stride)) Assertion failed.
5	Fail	a = [1:5 101:10:171 201:205]; a = a(randperm(length(a))); stride = 10; assert(isequal(skip_sequence_stride(a),stride)) Assertion failed.
6	Fail	a = [7:17:302 primes(300)]; a = sort(a); stride = 17; assert(isequal(skip_sequence_stride(a),stride)) Assertion failed.

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