func_code_string: #include <bits/stdc++.h>   using namespace std;   bool vis[200005];   vector<int> v[200005], ak, d1, dn;   vector<int> bfs(int n) {     queue<int> q;     vector<int> dis(200005);     q.push(n);     vis[n] = true;     dis[n] = 0;     while (!q.empty()) {       int x = q.front();       q.pop();       for (int i = 0; i < v[x].size(); i++) {         int u = v[x][i];         if (vis[u] == false) {           vis[u] = true;           dis[u] = dis[x] + 1;           q.push(u);         }       }     }     return dis;   }   bool cmp(int x, int y) { return d1[x] < d1[y]; }   int main() {     int n, m, k, n1, n2, sp, ans = 0;     scanf( %d %d %d , &n, &m, &k);     for (int i = 0; i < k; i++) {       scanf( %d , &sp);       ak.push_back(sp);     }     for (int i = 0; i < m; i++) {       scanf( %d %d , &n1, &n2);       v[n1].push_back(n2);       v[n2].push_back(n1);     }     d1 = bfs(1);     memset(vis, false, sizeof(vis));     dn = bfs(n);     sort(ak.begin(), ak.end(), cmp);     for (int i = 1; i < ak.size(); i++) {       int x = ak[i - 1];       int y = ak[i];       ans = max(ans, d1[x] + 1 + dn[y]);     }     ans = min(ans, d1[n]);     printf( %d n , ans);     return 0;   }   