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