func_code_string: #include <bits/stdc++.h>   #pragma comment(linker,  /STACK:67108864 )   using namespace std;   vector<int> g[200000];   bool def[200000], del[200000];   int all[200000], good[200000], _good[200000];   int n, m, k;   int main() {     scanf( %d%d%d , &n, &m, &k);     for (int i = 0; i < k; i++) {       int t;       scanf( %d , &t);       def[t - 1] = true;     }     for (int i = 0; i < m; i++) {       int from, to;       scanf( %d%d , &from, &to);       from--, to--;       g[from].push_back(to);       g[to].push_back(from);       if (def[from]) good[to]--;       if (def[to]) good[from]--;       all[from]++, all[to]++;     }     memcpy(_good, good, sizeof good);     priority_queue<pair<double, int>, vector<pair<double, int>>,                    greater<pair<double, int>>>         q;     for (int i = 0; i < n; i++) {       good[i] += all[i];       if (!def[i]) q.push(make_pair((double)good[i] / all[i], i));     }     double best = -1;     while (!q.empty()) {       int v = q.top().second;       double ratio = q.top().first;       q.pop();       if (del[v]) continue;       del[v] = true;       best = max(best, ratio);       for (auto it = g[v].begin(); it != g[v].end(); it++) {         if (def[*it] || del[*it]) continue;         good[*it]--;         q.push(make_pair((double)good[*it] / all[*it], *it));       }     }     memset(del, false, sizeof del);     memcpy(good, _good, sizeof _good);     for (int i = 0; i < n; i++) {       good[i] += all[i];       if (!def[i]) q.push(make_pair((double)good[i] / all[i], i));     }     double cur = -1;     while (!q.empty()) {       int v = q.top().second;       double ratio = q.top().first;       q.pop();       if (del[v]) continue;       cur = max(cur, ratio);       if (cur == best) break;       del[v] = true;       for (auto it = g[v].begin(); it != g[v].end(); it++) {         if (def[*it] || del[*it]) continue;         good[*it]--;         q.push(make_pair((double)good[*it] / all[*it], *it));       }     }     int r = 0;     for (int i = 0; i < n; i++)       if (!(del[i] || def[i])) r++;     printf( %d n , r);     for (int i = 0; i < n; i++)       if (!(del[i] || def[i])) printf( %d  , i + 1);     return 0;   }   