HELP@ Pishty and Tree ( SIGABRT )
I am storing the weight on the path from node 1 to each node .
and finally xor the weights on the path .

I coded for this problem using your approach and its giving tle for the sigabrt case as expected because if there are more than even 1000 nodes in path u to v then it should give tle due to the time constraints.

check my soln.
Reason for tle is your dfs, as the = operator you used in it to store the weight’s vector has linear time complexity and thus in worst case it goes beyond acceptable time limit and thus the TLE.

Hope this helps.