func_code_string: #include <bits/stdc++.h>   using namespace std;   struct node {     bool flag = 0;     long long sum1 = 0, sum2 = 0;     void operator+=(const node& rhs) {       flag |= rhs.flag;       sum1 += rhs.sum1;       sum2 = max(sum2, rhs.sum2);     }   };   const int N = 200200;   int n, m, s, T;   int par[N], siz[N];   int tin[N], low[N];   long long a[N];   vector<int> edges[N], tree[N];   vector<pair<int, int>> bridges;   int findSetId(int u) { return (par[u] == u ? u : par[u] = findSetId(par[u])); }   void findBridges(int u = 1, int p = -1) {     tin[u] = low[u] = ++T;     for (int v : edges[u]) {       if (v == p) {         continue;       }       if (tin[v] == 0) {         findBridges(v, u);         if (low[v] > tin[u]) {           bridges.push_back({u, v});         } else {           int x = findSetId(u);           int y = findSetId(v);           if (x != y) {             par[y] = x;             siz[x] += siz[y];             a[x] += a[y];           }         }       }       low[u] = min(low[u], low[v]);     }   }   void buildBridgeTree() {     for (int i = 1; i <= n; ++i) {       par[i] = i, siz[i] = 1;     }     findBridges();     for (auto& b : bridges) {       int u = findSetId(b.first);       int v = findSetId(b.second);       tree[u].push_back(v);       tree[v].push_back(u);     }   }   node solve(int u = s, int p = -1) {     node ret;     for (int v : tree[u]) {       if (v == p) {         continue;       }       ret += solve(v, u);     }     if (siz[u] > 1 || ret.flag) {       ret.sum1 += a[u], ret.flag = 1;     } else {       ret.sum2 += a[u];     }     return ret;   }   int main() {     cin >> n >> m;     for (int i = 1; i <= n; ++i) {       scanf( %lld , a + i);     }     while (m--) {       int u, v;       scanf( %d %d , &u, &v);       edges[u].push_back(v);       edges[v].push_back(u);     }     cin >> s;     buildBridgeTree();     auto out = solve(findSetId(s));     cout << out.sum1 + out.sum2;     return 0;   }   