#include using namespace std; typedef signed long long ll; #define _P(...) (void)printf(__VA_ARGS__) #define FOR(x,to) for(x=0;x<(to);x++) #define FORR(x,arr) for(auto& x:arr) #define FORR2(x,y,arr) for(auto& [x,y]:arr) #define ALL(a) (a.begin()),(a.end()) #define ZERO(a) memset(a,0,sizeof(a)) #define MINUS(a) memset(a,0xff,sizeof(a)) template bool chmax(T &a, const T &b) { if(a bool chmin(T &a, const T &b) { if(a>b){a=b;return 1;}return 0;} //------------------------------------------------------- int N; vector E[202020]; int CR; pair farthest(int cur,int pre,int d,vector& D) { D[cur]=d; pair r={d,cur}; FORR(e,E[cur]) if(e!=pre) r=max(r, farthest(e,cur,d+1,D)); return r; } pair> diameter() { // diameter,center vector D[2]; D[0].resize(N); D[1].resize(N); auto v1=farthest(0,0,0,D[0]); auto v2=farthest(v1.second,v1.second,0,D[0]); v1=farthest(v2.second,v2.second,0,D[1]); pair> R; R.first = v2.first; //重心を取る場合 for(int i=N-1;i>=0;i--) if(D[0][i]+D[1][i]==R.first && abs(D[0][i]-D[1][i])<=1) R.second.push_back(i); return R; } int D[200005],side[202020],G[202020];; int L[202020],R[202020],re[202020],ret[202020]; int id; void dfs(int cur,int p,int s,int d,int g) { side[cur]=s; G[cur]=g; L[cur]=id++; D[cur]=d; FORR(e,E[cur]) if(e!=p) dfs(e,cur,s,d+1,g); R[cur]=id; } int U[202020],V[202020]; map,int> M; int cnt[202020]; void solve() { int i,j,k,l,r,x,y; string s; cin>>N; FOR(i,N-1) { cin>>U[i]>>V[i]; U[i]--,V[i]--; M[{U[i],V[i]}]=M[{V[i],U[i]}]=i; E[U[i]].push_back(V[i]); E[V[i]].push_back(U[i]); } auto p=diameter(); CR=p.first/2; int C1=p.second[0]; int C2=p.second.back(); ll sum=0; if(C1==C2) { L[C1]=id++; FORR(e,E[C1]) dfs(e,C1,0,1,e); R[C1]=id; FOR(i,N) sum+=D[i]+CR; } else { L[C1]=id++; FORR(e,E[C1]) if(e!=C2) dfs(e,C1,0,1,e); R[C1]=id; L[C2]=id++; FORR(e,E[C2]) if(e!=C1) dfs(e,C2,1,1,e); R[C2]=id; FOR(i,N) { sum+=1+CR+D[i]; } ret[M[{C1,C2}]]=sum-N-CR; } FOR(i,N) if(D[i]==CR) cnt[L[i]+1]++; FOR(i,N) cnt[i+1]+=cnt[i]; vector C[2]; FOR(i,N) if(D[i]==1&&cnt[R[i]]-cnt[L[i]]) C[side[i]].push_back(i); if(C1==C2) { FOR(i,N-1) { x=U[i],y=V[i]; if(D[x]>D[y]) swap(x,y); ret[i]=sum; ret[i]-=R[y]-L[y]; ret[i]-=D[y]+CR-1; k=G[y]; if(cnt[R[k]]-cnt[L[k]]==cnt[R[y]]-cnt[L[y]]&&C[0].size()==2) { ret[i]-=(R[C[0][C[0][0]==k]]-L[C[0][C[0][0]==k]]); } } } else { FOR(i,N-1) if(M[{C1,C2}]!=i) { x=U[i],y=V[i]; if(D[x]>D[y]) swap(x,y); ret[i]=sum; ret[i]-=R[y]-L[y]; ret[i]-=D[y]+CR; k=G[y]; if(cnt[R[k]]-cnt[L[k]]==cnt[R[y]]-cnt[L[y]]&&C[side[y]].size()==1) { if(side[y]==0) { ret[i]-=(R[C2]-L[C2]); } else { ret[i]-=(R[C1]-L[C1]); } } } } FOR(i,N-1) cout<