Problem LISA too strict time limit?

As the title says, for the problem LISA , the time limit seems to bee too strict which is has no AC solution yet.

@admin , could you please have a look and make the corrections if needed.

Hi, the time limit has been increased to 1 second.

Forwarded to @admin for a check.

It still does not have any AC verdict ; do you ( or anyone else ) know how to solve the problem…?

Or are the test cases wrong…?

Did you get any reply ? I was trying to solve this problem as practice today, it had 0 AC and no editorials.

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I think there are enough submissions without AC to warrant a recheck of the test cases.