func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     long long int n, mx = 0;     cin >> n;     map<int, long long int> mp1, mp2;     map<pair<long long int, long long int>, int> mp;     vector<long long int> a(n), b(n);     for (int i = 0; i < n; i++) {       int x, y;       cin >> x >> y;       a[i] = x, b[i] = y;       mp1[x]++, mp2[y]++;       mp[{a[i], b[i]}]++;       mx = max(mx, mp2[y]);     }     long long int operations = INT_MAX;     for (int i = 0; i < n; i++) {       long long int temp = mp1[a[i]] + mp2[a[i]] - mp[{a[i], a[i]}];       if (temp >= (n + 1) / 2) {         operations =             min(operations, max(min(temp, (n + 1) / 2) - mp1[a[i]], 0LL));       }     }     if (operations == INT_MAX && mx < (n + 1) / 2) {       cout <<  -1 n ;       return 0;     }     if (operations == INT_MAX) {       operations = (n + 1) / 2;     }     cout << operations << endl;   }   