func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n, m;     cin >> n;     vector<int> a(n, 0);     for (int i = 0; i < n; i++) cin >> a[i];     cin >> m;     vector<int> b(m, 0);     for (int i = 0; i < m; i++) cin >> b[i];     int count = 0;     sort(a.begin(), a.end());     sort(b.begin(), b.end());     for (int i = 0; i < n; i++) {       for (int j = 0; j < m; j++) {         if (abs(a[i] - b[j]) <= 1) {           count++;           b[j] = INT_MAX;           break;         }       }     }     cout << count <<   n ;     return 0;   }   