#include using namespace std; using ll = long long; using pll = pair; #define drep(i, cc, n) for (ll i = (cc); i <= (n); ++i) #define rep(i, n) drep(i, 0, n - 1) #define all(a) (a).begin(), (a).end() #define pb push_back #define fi first #define se second mt19937_64 rng(chrono::system_clock::now().time_since_epoch().count()); const ll MOD1000000007 = 1000000007; const ll MOD998244353 = 998244353; const ll MOD[3] = {999727999, 1070777777, 1000000007}; const ll LINF = 1LL << 60; const int IINF = 1 << 30; template struct Edge{ int to; T w; Edge(int to_, T w_=1){ to = to_; w=w_; } }; template using Tree = vector>>; template using Graph = vector>>; /* 容量&重み付きエッジ for Dinic */ template struct REdge{ int to; T cap; T cost; int rev; REdge(int to_, T cap_, T cost_=1){ to = to_; cap = cap_; cost = cost_; } REdge(int to_, T cap_, T cost_, int rev_){ to = to_; cap = cap_; cost = cost_; rev = rev_; } }; /* 残余グラフ for Dinic */ template using RGraph = vector>>; template class modint{ long long x; public: modint(long long x=0) : x((x%mod+mod)%mod) {} modint operator-() const { return modint(-x); } bool operator==(const modint& a){ if(x == a) return true; else return false; } bool operator==(long long a){ if(x == a) return true; else return false; } bool operator!=(const modint& a){ if(x != a) return true; else return false; } bool operator!=(long long a){ if(x != a) return true; else return false; } modint& operator+=(const modint& a) { if ((x += a.x) >= mod) x -= mod; return *this; } modint& operator-=(const modint& a) { if ((x += mod-a.x) >= mod) x -= mod; return *this; } modint& operator*=(const modint& a) { (x *= a.x) %= mod; return *this; } modint operator+(const modint& a) const { modint res(*this); return res+=a; } modint operator-(const modint& a) const { modint res(*this); return res-=a; } modint operator*(const modint& a) const { modint res(*this); return res*=a; } modint pow(long long t) const { if (!t) return 1; modint a = pow(t>>1); a *= a; if (t&1) a *= *this; return a; } // for prime mod modint inv() const { return pow(mod-2); } modint& operator/=(const modint& a) { return (*this) *= a.inv(); } modint operator/(const modint& a) const { modint res(*this); return res/=a; } friend std::istream& operator>>(std::istream& is, modint& m) noexcept { is >> m.x; m.x %= mod; if (m.x < 0) m.x += mod; return is; } friend ostream& operator<<(ostream& os, const modint& m){ os << m.x; return os; } }; using mint = modint; struct Namori{ ll N; vector> G; vector group; //goroup[閉路上の頂点]=-1, gourp[閉路外の頂点]=根の頂点 Namori(vector> G_){ N = (ll)G_.size(); G.resize(N); for(ll u=0; u deg(N, 0); for(ll u=0; u Q; for(ll u=0; u> n; vector> G(n); vector E(n); rep(i, n){ ll a, b; cin >> a >> b; a--; b--; G[a].pb(b); G[b].pb(a); E[i] = {a, b}; } Namori nmr(G); vector par(n, -1); function dfs = [&](ll v, ll p){ par[v] = p; for(ll u : G[v]) if(u!=p) dfs(u, v); }; rep(v, n){ if(nmr.groupNumber(v)==-1){ for(ll vv : G[v]) if(nmr.groupNumber(vv)!=-1) dfs(vv, v); } } vector ans(n, -1); //木の部分の辺の向きを決定 for(ll i=0; i> H(n); ll s = 0; for(ll i=0; i dfs2 = [&](ll v, ll p){ if(v == s) return; for(pll tmp : H[v]){ ll u = tmp.fi; ll idx = tmp.se; if(p == u) continue; if(E[idx].fi==v){ ans[idx] = 0; }else{ ans[idx] = 1; } dfs2(u, v); } }; dfs2(t, s); rep(i, n){ if(ans[i]==0) cout << "->" << endl; else cout << "<-" << endl; } }