yes I got it . Thanks

I believe there is a missing test case in Problem 2130B - Pathless – Sum on the Subtree, which leads to incorrect solutions being accepted. Consider the following input:

5 9 0 2 2 2 1 This input represents a tree with 5 nodes and a total required sum of 9. The array specifies the desired subtree sums for each node. In this case, the configuration is already valid, and the correct output should be:

0 2 2 2 1 However, submission 342216799 incorrectly returns -1 for this input, yet it was accepted by the system. This suggests that the test cases do not cover such scenarios where the input is already a valid configuration, but the solution fails to recognize it.