Delegation (Gold)

정점이 N개인 트리가 주어질 때, 1부터 N-1까지의 각 K에 대해 트리의 간선을 길이 K인 경로들로 나눌 수 있는지 판별한다.

어려움8트리DFS그리디정수론아직 제출이 없습니다시간 제한2초메모리 제한512 MB

문제

Farmer John's farm consists of NN pastures (2N1052 \leq N \leq 10^5) connected by N1N-1 roads, so that any pasture is reachable from any other pasture. That is, the farm is a tree. But after 28 years of dealing with the tricky algorithmic problems that inevitably arise from trees, FJ has decided that a farm in the shape of a tree is just too complex. He believes that algorithmic problems are simpler on paths.

Thus, his plan is to partition the set of roads into several paths, and delegate responsibility for each path to a worthy farm hand. To avoid contention, he wants each path to be the same length. He wonders for which lengths there exists such a partition.

More precisely, for each 1KN11 \leq K \leq N-1, help Farmer John determine whether the roads can be partitioned into paths of length exactly KK.

입력

The first line contains a single integer NN.

The next N1N-1 lines each contain two space-separated integers aa and bb describing an edge between vertices aa and bb. Each of aa and bb is in the range 1N1 \ldots N.

출력

Output a bit string of length N1.N-1. For each 1KN1,1\le K\le N-1, the KKth bit of this string from the left should equal one if it is possible to partition the edges of the tree into paths of length exactly KK and 00 otherwise.

힌트

It is possible to partition this tree into paths of length KK for K=1,2,3.K=1,2,3. For K=3K=3, a possible set of paths is as follows:

1312118,10986,7623,542113-12-11-8, 10-9-8-6, 7-6-2-3, 5-4-2-1