func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n, m, s1 = 0, s2 = 0;     cin >> n;     vector<int> v1(n);     for (int i = 0; i < n; i++) cin >> v1[i];     cin >> m;     vector<int> v2(m);     for (int i = 0; i < m; i++) cin >> v2[i];     sort(v1.begin(), v1.end());     sort(v2.begin(), v2.end());     int res = 0;     while (s1 < n && s2 < m) {       if (abs(v1[s1] - v2[s2]) <= 1) {         res++;         s1++;         s2++;       } else if (v1[s1] > v2[s2])         s2++;       else         s1++;     }     cout << res << endl;     return 0;   }   