Something wrong with compilation?


#1

It gives me below compilation error
Main.java:224: error: incompatible types: MyList<Integer> cannot be converted to int[]
TreeNode ans = obj.sortedArrayToBST(A);
^
Note: Some messages have been simplified; recompile with -Xdiags:verbose to get full output
1 error

even though I am just returning null for testing purpose:
public class Solution {

// DO NOT MODIFY THE ARGUMENTS WITH "final" PREFIX. IT IS READ ONLY
public TreeNode sortedArrayToBST(final int[] A) {
    return null;
}

}