They can't overlap! I don't think the problem specifies that? You have to interpret "break up" to mean "non-overlapping" to claim that the problem means what y

They can't overlap! I don't think the problem specifies that? You have to interpret "break up" to mean "non-overlapping" to claim that the problem means what you're saying it means; I found 341 "contiguous subsequences such that the sums of each of the subsequences are equal", but they overlap. (If you had said "partition" I suspect I would have got what you meant)