func_code_string: #include <bits/stdc++.h>   using namespace std;   long long int mod = 1000000007;   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     cout.tie(NULL);     long long int l = 1, h, i, n, x, t, q, y = -1, z = 0, a = 0, b = 0, c = 0, k,                   sum = 0, m, d = 0, r, w, j, ans, s, mini = INT_MAX,                   maxi = INT_MIN;     bool cou;     float kl;     long long int count = 0;     t = 1;     vector<bool> sie(1000001, 0);     char cg;     string str, std;     a = 1;     while (t--) {       cin >> n >> m;       vector<int> vec(n);       map<int, bool> mp;       for (i = 0; i < n; ++i) cin >> vec[i];       for (i = 0; i < m; ++i) {         cin >> x;         mp[x] = 1;       }       for (i = 0; i < n; ++i) {         if (mp[vec[i]]) cout << vec[i] <<    ;       }     }   }   