#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 dp[202020][2]; void dfs(int cur,int pre) { dp[cur][0]=0; dp[cur][1]=1<<20; FORR(e,E[cur]) if(e!=pre) { dfs(e,cur); dp[cur][0]=max(dp[cur][0],1+dp[e][1]); dp[cur][1]=min(dp[cur][1],1+dp[e][0]); } if(dp[cur][1]==1<<20) dp[cur][1]=0; } void solve() { int i,j,k,l,r,x,y; string s; cin>>N; FOR(i,N-1) { cin>>x>>y; x--,y--; E[x].push_back(y); E[y].push_back(x); } dfs(0,0); cout<