func_code_string: #include <bits/stdc++.h>   bool isFile;   using namespace std;   const int dx[] = {1, 0, -1, 0, 1, 1, -1, -1};   const int dy[] = {0, 1, 0, -1, 1, -1, 1, -1};   const int day[12] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};   void _();   void faster() {     _();     if (isFile) {       freopen(            taskA             .in ,            r , stdin);       freopen(            taskA             .out ,            w , stdout);     }     if (1) {       ios_base::sync_with_stdio(false);       cin.tie(0);       cout.tie(0);     }   }   const long long INF = 9e18;   const int inf = 2e9;   const int MOD = 998244353;   const long double PI = acos(-1);   const long double EPS = 1e-7;   const int N = (int)2e5 + 5;   const int M = 1234;   vector<int> g[N];   int dp[N];   void dfs(int v, int pr = -1, int lvl = 0) {     dp[lvl % 2]++;     for (int to : g[v])       if (to != pr) dfs(to, v, lvl + 1);   }   void solve() {     int n;     cin >> n;     for (int i = 1; i < n; i++) {       int u, v;       cin >> u >> v;       u--, v--;       g[u].push_back(v);       g[v].push_back(u);     }     dfs(1);     cout << min(dp[0], dp[1]) - 1 << endl;   }   void _() {}   int main() {     faster();     int t = 1;     int id = 1;     while (t--) {       solve();     }     return 0;   }   