#include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef LOCAL # include "debug_print.hpp" # define debug(...) debug_print::multi_print(#__VA_ARGS__, __VA_ARGS__) #else # define debug(...) (static_cast(0)) #endif using namespace std; #define rep(i,n) for(int i=0; i<(n); i++) #define rrep(i,n) for(int i=(n)-1; i>=0; i--) #define FOR(i,a,b) for(int i=(a); i<(b); i++) #define RFOR(i,a,b) for(int i=(b-1); i>=(a); i--) #define ALL(v) v.begin(), v.end() #define RALL(v) v.rbegin(), v.rend() #define UNIQUE(v) v.erase( unique(v.begin(), v.end()), v.end() ); #define pb push_back using ll = long long; using D = double; using LD = long double; using P = pair; template using PQ = priority_queue>; template using minPQ = priority_queue, greater>; templatebool chmax(T &a, const T &b) { if (abool chmin(T &a, const T &b) { if (b ostream &operator<<(ostream &os, const pair &p) { os << p.first << " " << p.second; return os; } template istream &operator>>(istream &is, pair &p) { is >> p.first >> p.second; return is; } template ostream &operator<<(ostream &os, const vector &v) { int s = (int)v.size(); for (int i = 0; i < s; i++) os << (i ? " " : "") << v[i]; return os; } template istream &operator>>(istream &is, vector &v) { for (auto &x : v) is >> x; return is; } void in() {} template void in(T &t, U &...u) { cin >> t; in(u...); } void out() { cout << "\n"; } template void out(const T &t, const U &...u) { cout << t; if (sizeof...(u)) cout << sep; out(u...); } void outr() {} template void outr(const T &t, const U &...u) { cout << t; outr(u...); } int main(){ ios_base::sync_with_stdio(false); cin.tie(nullptr); int n; in(n); vector> g(n); vector from(n); vector ans(n); rep(i,n){ int a,b; in(a,b); a--; b--; g[a].pb({b,i}); g[b].pb({a,i}); from[i] = a; } vector

pre(n,{-1,-1}); pre[0] = {0,-1}; int lp_start = -1, lp_end = -1; auto rec = [&] (auto rec, int u, int p) -> void{ for(auto [v,idx] : g[u]){ if(v == p) continue; if(pre[v].first != -1){ lp_start = u; lp_end = v; ans[idx] = (from[idx] == v ? "->" : "<-"); return; } pre[v] = {u,idx}; rec(rec,v,u); } }; rec(rec,0,-1); int now = lp_end; vector lp(n,false); lp[lp_start] = true; while(now != lp_start){ lp[now] = true; auto [p,idx] = pre[now]; ans[idx] = (from[idx] == p ? "->" : "<-"); now = p; } vector seen = lp; rep(i,n){ if(!lp[i]) continue; queue q; q.push(i); while(q.size()){ int x = q.front(); q.pop(); for(auto [y,idx] : g[x]){ if (seen[y]) continue; seen[y] = true; ans[idx] = (from[idx] == y ? "->" : "<-"); q.push(y); } } } rep(i,n) out(ans[i]); }