func_code_string: #include <bits/stdc++.h>   using namespace std;   const double PI = 3.141592653589793238460;   using namespace std;   const int N = 200200;   vector<int> g[N];   int w[N], vis[N], done[N];   int can_back[N];   int n, m, s;   long long maximum = 0;   void dfs(int u, int par) {     vis[u] = 1;     for (auto v : g[u]) {       if (v == par) continue;       if (vis[v])         can_back[v] = 1;       else         dfs(v, u);       if (can_back[v] == 1) can_back[u] = 1;     }   }   void findmax(int u, long long sum) {     done[u] = 1;     if (g[u].size() == 1 and u != s) {       sum += w[u];       maximum = max(maximum, sum);       return;     }     if (can_back[u] == 0) sum += w[u];     for (auto v : g[u]) {       if (!done[v]) findmax(v, sum);     }   }   int main() {     ios_base::sync_with_stdio(false);     cin.tie(0);     cout.tie(0);     cin >> n >> m;     for (int i = 1; i <= n; i++) {       cin >> w[i];     }     for (int i = 1; i <= m; i++) {       int u, v;       cin >> u >> v;       g[u].push_back(v);       g[v].push_back(u);     }     cin >> s;     can_back[s] = 1;     dfs(s, 0);     long long ans = 0;     for (int i = 1; i <= n; i++) {       if (can_back[i] == 1) ans += w[i];     }     findmax(s, 0);     ans += maximum;     cout << ans;     return 0;   }   