func_code_string: #include <bits/stdc++.h>   using namespace std;   const int N = (int)1e5 + 5;   const int INF = (int)1e9 + 9;   const int MOD = (int)1e9 + 7;   void go(int x) {     cout << x;     exit(0);   }   vector<int> g[N];   set<int> st[N];   int c[N];   bool used[N];   int main() {     int n, m, cnt = -1, ans = -1;     cin >> n >> m;     for (int i = 1; i <= n; i++) {       scanf( %d , &c[i]);       used[c[i]] = 1;     }     for (int i = 1; i <= m; i++) {       int u, v;       scanf( %d%d , &u, &v);       g[u].push_back(v);       g[v].push_back(u);       used[c[u]] = 1;       used[c[v]] = 1;       if (c[u] == c[v]) {         continue;       }       st[c[u]].insert(c[v]);       st[c[v]].insert(c[u]);     }     for (int i = 1; i <= 1e5; i++) {       if (used[i] && (int)st[i].size() > cnt) {         cnt = (int)st[i].size();         ans = i;       }     }     cout << ans << endl;   }   