I feel quite amnoyed with this problem ↵
↵
how can i count the number of MEX(simple path u to v) = m ( u,v is the same with v,u) on a tree rooted at 1?↵
↵
and other query is swap the value of node u and node v↵
↵
Related note: ↵
can i have some properties of MEX functions, i have some:↵
↵
- If the set of numbers want to accquire the MEX = x, it must atleast have x+1 elements without a single element = x↵
↵
Sorry for bad english
↵
how can i count the number of MEX(simple path u to v) = m ( u,v is the same with v,u) on a tree rooted at 1?↵
↵
and other query is swap the value of node u and node v↵
↵
Related note: ↵
can i have some properties of MEX functions, i have some:↵
↵
- If the set of numbers want to accquire the MEX = x, it must atleast have x+1 elements without a single element = x↵
↵
Sorry for bad english



