func_code_string: #include <bits/stdc++.h>   using namespace std;   using INT = long long;   int a[200100], b[200100];   map<int, int> mp[2];   int arr[200100];   map<int, int> vst;   int main() {     int n, st;     cin >> n >> st;     for (int i = 1; i <= n; i++) {       scanf( %d , &a[i]);     }     int m, ed;     cin >> m >> ed;     for (int i = 1; i <= m; i++) {       scanf( %d , &b[i]);     }     int d = 1;     int ans = 1;     for (int j = 1; j <= 30; j++) {       mp[0].clear();       mp[1].clear();       int x = (1 << j);       int nn = 0;       for (int i = 1; i <= n; i++) {         int r = a[i] % x;         mp[0][r]++;         ans = max(ans, mp[0][r]);         arr[++nn] = r;       }       for (int i = 1; i <= m; i++) {         int r = b[i] % x;         mp[1][r]++;         ans = max(ans, mp[1][r] + mp[0][(r + x / 2) % x]);         arr[++nn] = r;       }     }     for (int i = 1; i <= n; i++) vst[a[i]] = 1;     for (int i = 1; i <= m; i++)       if (vst[b[i]]) ans = max(ans, 2);     cout << ans << endl;   }   