#include<bits/stdc++.h>
using namespace std;
#define ALL(x) begin(x),end(x)
#define rep(i,n) for(int i=0;i<(n);i++)
#define debug(v) cout<<#v<<":";for(auto x:v){cout<<x<<' ';}cout<<endl;
#define mod 1000000007
using ll=long long;
const int INF=1000000000;
const ll LINF=1001002003004005006ll;
int dx[]={1,0,-1,0},dy[]={0,1,0,-1};
// ll gcd(ll a,ll b){return b?gcd(b,a%b):a;}
template<class T>bool chmax(T &a,const T &b){if(a<b){a=b;return true;}return false;}
template<class T>bool chmin(T &a,const T &b){if(b<a){a=b;return true;}return false;}

struct IOSetup{
    IOSetup(){
        cin.tie(0);
        ios::sync_with_stdio(0);
        cout<<fixed<<setprecision(12);
    }
} iosetup;

template<typename T>
ostream &operator<<(ostream &os,const vector<T>&v){
    for(int i=0;i<(int)v.size();i++) os<<v[i]<<(i+1==(int)v.size()?"":" ");
    return os;
}
template<typename T>
istream &operator>>(istream &is,vector<T>&v){
    for(T &x:v)is>>x;
    return is;
}

template<typename BitType,int MAXLOG,typename Monoid>
struct BinaryTrieMonoid{
    private:
    struct Node{
        Node *nxt[2];
        Monoid val;
        Node(Monoid val):nxt{nullptr,nullptr},val(val){}
    };

    Node *root;

    using F=function<Monoid(Monoid,Monoid)>;
    F f;
    const Monoid e;

    Monoid query(BitType a,BitType b,Node *cur,BitType l,BitType r,int dep,BitType xor_val){
        if(a<=l and r<=b) return (cur?cur->val:e);
        if(dep<0 or b<=l or r<=a or !cur) return e;
        bool x0=(xor_val>>dep)&1;
        Monoid L=query(a,b,cur->nxt[x0],l,(l+r)/2,dep-1,xor_val);
        Monoid R=query(a,b,cur->nxt[x0^1],(l+r)/2,r,dep-1,xor_val);
        return f(L,R);
    }
    void update(Node *cur,Monoid x,BitType bit,int dep){
        if(dep==-1){
            cur->val=x;
            return ;
        }
        bool go_to=(bit>>dep)&1;
        if(!cur->nxt[go_to]) cur->nxt[go_to]=new Node(e);
        update(cur->nxt[go_to],x,bit,dep-1);
        cur->val=f(cur->nxt[0]?cur->nxt[0]->val:e,cur->nxt[1]?cur->nxt[1]->val:e);
        return ;
    }

    public:
    BinaryTrieMonoid(F f,const Monoid &e):root(new Node(e)),f(f),e(e){}

    // fold [l,r)
    // xor_valを指定したとき，可換じゃない演算だと壊れると思います．多分
    Monoid query(BitType l,BitType r,BitType xor_val=0){
        return query(l,r,root,0,BitType(1)<<MAXLOG,MAXLOG-1,xor_val);
    }
    void update(BitType bit,Monoid x){
        update(root,x,bit,MAXLOG-1);
    }
    Monoid operator[](const BitType &k){
        return query(k,k+1);
    }
};

signed main(){
    ll geta=2000000000000000ll;
    BinaryTrieMonoid<ll,54,ll> seg([](ll a,ll b){return a+b;},0ll);

    ll p=0;

    auto query=[&](ll t){
        return seg.query(t-p+geta,geta*4ll);
    };

    vector<ll> memo;

    int q;cin>>q;
    while(q--){
        int t;ll x;cin>>t>>x;
        if(t==1){
            seg.update(x-p+geta,seg[x-p+geta]+1);
            memo.push_back(x-p);
        }else if(t==2){
            x=memo[x-1];
            if(seg[x+geta]) seg.update(x+geta,seg[x+geta]-1);
        }else{
            p+=x;
        }

        ll lw=0,hi=geta,ans=0;
        while(lw<=hi){
            ll mid=(lw+hi)/2;

            if(query(mid)>=mid) ans=mid,lw=mid+1;
            else hi=mid-1;
        }
        cout<<ans<<"\n";
    }
    return 0;
}