I have WA #1
Seems that test #1 is a test from statement.
For this test my program outputs: 15 2 4 7 4 1 4 5 6 3 2 5 7 5 2 1 2\n
And this is correct eulerian tour.
And output in statement is different: 15 2 5 4 2 3 6 5 7 4 1 2 1 4 7 5 2\n
May be the solution validator is wrong?
Could somebody help, please.