func_code_string: #include <bits/stdc++.h>   using namespace std;   vector<int> vi[200200];   int dp[200200];   int dfs(int now, int prev) {     dp[now] = 1;     for (auto x : vi[now]) {       if (x == prev) continue;       dp[now] += dfs(x, now);     }     return dp[now];   }   long long int rose = 0;   int n;   void rec(int now, int prev, long long int sum) {     rose = max(rose, sum);     for (auto x : vi[now]) {       if (x == prev) continue;       rec(x, now, sum - dp[x] + (n - dp[x]));     }   }   int main() {     int i, j, k, x, y, ans, curr, temp, m;     scanf( %d , &n);     for (i = 1; i < n; i++) {       scanf( %d %d , &x, &y);       vi[x].push_back(y);       vi[y].push_back(x);     }     dfs(1, 0);     for (i = 1; i <= n; i++) rose += dp[i];     rec(1, 0, rose);     printf( %lld n , rose);     return 0;   }   