#include #include #include #include #include #include #include #include #include #include #include #include #include #include #define debug_value(x) cerr << "line" << __LINE__ << ":<" << __func__ << ">:" << #x << "=" << x << endl; #define debug(x) cerr << "line" << __LINE__ << ":<" << __func__ << ">:" << x << endl; template inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; } template inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; } using namespace std; typedef long long ll; template vector> vec2d(int n, int m, T v){ return vector>(n, vector(m, v)); } template vector>> vec3d(int n, int m, int k, T v){ return vector>>(n, vector>(m, vector(k, v))); } template void print_vector(vector v, char delimiter=' '){ if(v.empty()) { cout << endl; return; } for(int i = 0; i+1 < v.size(); i++) cout << v[i] << delimiter; cout << v.back() << endl; } using mint = atcoder::modint998244353; ostream& operator<<(ostream& os, const mint& m){ os << m.val(); return os; } int main(){ ios::sync_with_stdio(false); cin.tie(0); cout << setprecision(10) << fixed; int n; cin >> n; vector> g(n); for(int i = 0; i < n-1; i++){ int u, v; cin >> u >> v; u--; v--; g[u].push_back(v); g[v].push_back(u); } auto dp = vec2d(n, 2, mint(0)); function dfs = [&](int v, int par){ vector cnt_path, cnt_all; vector u(3); u[0] = 1; for(int to: g[v]){ if(par == to) continue; dfs(to, v); vector uu(3); for(int i = 0; i < 3; i++){ for(int j = 0; i+j < 3; j++){ uu[i+j] += u[i]*dp[to][j]; } } u = uu; } dp[v][0] = u[1]+u[2]; dp[v][1] = u[0]+u[1]; }; dfs(0, -1); cout << dp[0][0] << endl; }