#include <bits/stdc++.h>
using namespace std;
using i64 = long long;
#define rep(i,s,e) for(int (i) = (s);(i) <= (e);(i)++)

/* include file*/
#include <functional>
#include <vector>
using namespace std;
int Q;
vector<i64> T,X;
vector<i64> Xs;

template <class Monoid>
struct Segment {
  using Func = function<Monoid(Monoid, Monoid)>;

  vector<Monoid> node;
  Monoid ide;
  int n = 1;

  Func bin_f;
  Func update_f;

  Segment(const vector<Monoid>& init, Monoid ide_, Func f_, Func u_f)
      : bin_f(f_), ide(ide_), update_f(u_f) {
    int sz = init.size();
    while (n < sz) n *= 2;
    node.assign(n * 2 - 1, ide);
    for (int i = 0; i < sz; i++) node[i + n - 1] = init[i];
    for (int i = n - 2; i >= 0; i--)
      node[i] = bin_f(node[i * 2 + 1], node[i * 2 + 2]);
  }

  void update(int i, Monoid x) {
    i += n - 1;
    node[i] = update_f(node[i], x);
    while (i) {
      i = (i - 1) / 2;
      node[i] = bin_f(node[i * 2 + 1], node[i * 2 + 2]);
    }
  }

  Monoid get_inter(int a, int b, int k = 0, int l = 0, int r = -1) {
    if (r < 0) r = n;
    if (a <= l && r <= b) return node[k];
    if (r <= a || b <= l) return ide;

    Monoid lm = get_inter(a, b, k * 2 + 1, l, (l + r) / 2);
    Monoid rm = get_inter(a, b, k * 2 + 2, (l + r) / 2, r);
    return bin_f(lm, rm);
  }
};

// http://judge.u-aizu.ac.jp/onlinejudge/review.jsp?rid=2730414#1
// http://judge.u-aizu.ac.jp/onlinejudge/review.jsp?rid=2730425#1


int main(){
  cin >> Q;
  T.resize(Q);
  X.resize(Q);
  i64 SUM = 0;
  rep(i,0,Q - 1){
    cin >> T[i] >> X[i];
    if(T[i] == 3){
      SUM += X[i];
    }
    if(T[i] == 1)
      Xs.push_back(X[i] - SUM);
  }
  sort(Xs.begin(),Xs.end());
  Xs.erase(unique(Xs.begin(), Xs.end()),Xs.end());
  rep(i,0,Q - 1){
    if(T[i] == 1)
      X[i] = lower_bound(Xs.begin(), Xs.end(), X[i]) - Xs.begin();
  }

  vector<i64> R;

  Segment<i64> seg(vector<i64>(Xs.size(),0),0,[](i64 a,i64 b){
    return a + b;
  },[](i64 a,i64 b){
    return a + b;
  });
  i64 BASE = 0;
  rep(i,0,Q - 1){
    if(T[i] == 1){
      seg.update(X[i], 1);
      R.push_back(X[i]);
    }
    if(T[i] == 2){
      seg.update(R[X[i] - 1],-1);
    }
    if(T[i] == 3){
      BASE += X[i];
    }

    int ok = 0;
    int ng = 1e9;
    while(ng - ok > 1){
      int mid = (ok + ng) / 2;
      if(mid <= seg.get_inter(lower_bound(Xs.begin(),Xs.end(),mid - BASE) - Xs.begin(),seg.n)){
        ok = mid;
      }
      else{
        ng = mid;
      }
    }

    cout << ok << endl;
  }
}