func_code_string: #include <bits/stdc++.h>   const int maxn = 300010;   int n, m, cnt, go_far;   int not_read[maxn], clr[maxn];   int a[maxn];   int main() {     int i, op, x, t, zz;     scanf( %d%d , &n, &m);     cnt = 0;     a[0] = 0;     go_far = 0;     for (zz = 1; zz <= m; zz++) {       scanf( %d%d , &op, &x);       if (op == 1) {         a[++a[0]] = x;         cnt++;         not_read[x]++;       } else if (op == 2) {         cnt -= not_read[x];         clr[x] += not_read[x];         not_read[x] = 0;       } else {         t = x;         for (i = go_far + 1; i <= t; i++) {           x = a[i];           if (clr[x])             clr[x]--;           else             cnt--, not_read[x]--;         }         if (t > go_far) go_far = t;       }       printf( %d n , cnt);     }   }   