I coded according to this definition, but the test cases failed except the first one.

Here is a custom test case that I used 7 10 4 3 5 6 7 11 10 / \ 4 11 / \ 3 5 \ 6 \ 7 According the defninition, the output should be 3 4 10 11, and that is what my program also gives, but when I submit the code, except first test case, all other test cases fails