My AC program prints wrong answer on this test:
9
6 7 1 6
1 8 2 6 5 1
1 2
1 3
2 4
2 5
3 4
4 6
5 6

Correct answer is NO

Your test was added. Previously accepted solutions from 39 authors were affected by this test.

A bunch of other tests against the same issue and against unrelated issues were added. At the same time the time limit was reduced from 1 sec to 0.5 sec to better match the original limitations when the problem was first published.

All solutions were rejudged. 65 authors lost the Accepted status for this problem.

Thanks!