func_code_string: #include <bits/stdc++.h>   using namespace std;   const double PI = acos(-1.0);   const double eps = 1e-6;   const int INF = 1e12;   const int maxnnn = 2e8 + 30;   const long long zero = 0;   long long gcd(long long a, long long b) {     if (a < b) swap(a, b);     if (a % b == 0)       return b;     else       gcd(b, a % b);   }   string ntos(long long a) {     string str;     stringstream ss;     ss << a;     ss >> str;     return str;   }   long long ston(string a) {     long long x;     stringstream ss;     ss << a;     ss >> x;     return x;   }   int main() {     ios_base::sync_with_stdio(0);     cin.tie(0);     bool flag;     long long zimu[26];     long long n, m, a, b, t, y, fans, c, x, z, sw;     string s, s1, s2;     cin >> m >> n;     vector<long long> py(m + 1);     sw = 0;     py.clear();     for (long long i = 0; i < n; ++i) {       cin >> a >> b;       py[min(a, b)]++;       if (py[min(a, b)] == 1) sw++;     }     cin >> c;     while (c--) {       cin >> x;       if (x == 3) {         cout << m - sw << endl;       } else if (x == 1) {         cin >> y >> z;         py[min(y, z)]++;         if (py[min(y, z)] == 1) sw++;       } else {         cin >> y >> z;         py[min(y, z)]--;         if (py[min(y, z)] == 0) sw--;       }     }   }   