func_code_string: #include <bits/stdc++.h>   using namespace std;   void read(int &x) {     register int c = getchar();     x = 0;     for (; c < 48 || c > 57; c = getchar())       ;     for (; c > 47 && c < 58; c = getchar()) x = (x << 1) + (x << 3) + c - 48;   }   queue<int> y[300005], v;   int main() {     int n, q, w = 0, x, z = 0, t = 0;     read(n);     read(q);     while (q--) {       read(x);       if (x == 1) {         read(x);         v.push(x);         y[x].push(t++);       } else if (x == 2) {         read(x);         z += y[x].size();         while (!y[x].empty()) y[x].pop();       } else {         read(x);         while (x > w) {           if (!y[v.front()].empty() && y[v.front()].front() < x) {             y[v.front()].pop();             z++;           }           ++w;           v.pop();         }       }       printf( %d n , t - z);     }   }   