func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     int n, m, k;     cin >> n >> m >> k;     map<int, bool> mp;     for (int i = 0; i < m; i++) {       int x;       cin >> x;       mp[x] = 1;     }     int pos = 1;     int ans = -1;     if (mp[pos]) {       cout << 1;       return 0;     }     for (int i = 0; i < k; i++) {       int x, y;       cin >> x >> y;       if (pos == x or pos == y) {         if (pos != x)           pos = x;         else           pos = y;         if (mp[pos]) {           cout << pos;           return 0;         }       }     }     cout << pos;     return 0;   }   