func_code_string: #include <bits/stdc++.h>   using namespace std;   const int nax = 200005;   const int mod = 998244353;   vector<int> graph[nax];   vector<int> degree(nax);   vector<int> level(nax);   vector<int> vis(nax);   vector<int> parent(nax);   vector<int> str[nax];   void dfs(int node, int l) {     vis[node] = 1;     level[node] = l + 1;     str[l + 1].push_back(node);     int d = 0;     for (auto i : graph[node]) {       if (vis[i] == 0) {         dfs(i, l + 1);         parent[i] = node;         d++;       }     }     degree[node] = d;     return;   }   void solve() {     int n;     cin >> n;     for (int i = 1; i < n + 1; i++) degree[i] = 0;     for (int i = 1; i < n + 1; i++) level[i] = 0;     for (int i = 1; i < n + 1; i++) parent[i] = 0;     for (int i = 1; i < n + 1; i++) vis[i] = 0;     for (int i = 1; i <= n; ++i) {       graph[i].clear();       str[i].clear();     }     for (int i = 0; i < n - 1; i++) {       int a, b;       cin >> a >> b;       graph[a].push_back(b);       graph[b].push_back(a);     }     dfs(1, 0);     int ans = 0;     for (int i = 1; i < n + 1; i++)       if (degree[i] == 0) ans++;     vector<int> rem(n + 1);     for (int i = n; i >= 2; i--) {       for (auto item : str[i]) {         if (degree[item] == 0) continue;         int check = 1;         for (auto child : graph[item]) {           if (level[child] > level[item] && rem[child] == 0) {             check = check & (!degree[child]);           }         }         if (check) {           rem[item] = 1;           degree[parent[item]]--;           if (degree[parent[item]] > 0) ans--;         }       }     }     cout << ans << endl;     return;   }   int main() {     int T;     T = 1;     scanf( %d , &T);     while (T--) {       solve();     }   }   