#include <fstream>

using namespace std;
ifstream cin ("hotel.in");
ofstream cout ("hotel.out");
int n,m;
int lt[500001],rt[500001],arb[500001],stg,rgt,c;
void init ()
{
    lt[1]=rt[1]=arb[1]=n;
}
void up_date (int st,int dr,int nod)
{
    if(stg<=st && dr<=rgt)
    {
        if(c==1) lt[nod]=rt[nod]=arb[nod]=0;
        else lt[nod]=rt[nod]=arb[nod]=dr-st+1;
    }
    else
    {
        int mij=(st+dr)/2;
        if(arb[nod]==0) lt[nod*2]=rt[nod*2]=lt[nod*2+1]=rt[nod*2+1]=arb[nod*2]=arb[nod*2+1]=0;
        if(arb[nod]==dr-st+1) lt[nod*2]=rt[nod*2]=arb[nod*2]=mij-st+1,lt[nod*2+1]=rt[nod*2+1]=arb[nod*2+1]=dr-mij;
        if(stg<=mij) up_date(st,mij,nod*2);
        if(rgt>mij) up_date(mij+1,dr,nod*2+1);
        lt[nod]=lt[nod*2]; if(lt[nod*2]==mij-st+1) lt[nod]+=lt[nod*2+1];
        rt[nod]=rt[nod*2+1]; if(rt[nod*2+1]==dr-mij) rt[nod]+=rt[nod*2];
        arb[nod]=max(arb[nod*2],arb[nod*2+1]);
        arb[nod]=max(arb[nod],rt[nod*2]+lt[nod*2+1]);
    }
}
void read ()
{
    cin>>n>>m;
    init();
    for(int i=1;i<=m;i++)
    {
        cin>>c;
        if(c==3) cout<<arb[1]<<"\n";
        else
        {
            cin>>stg>>rgt; rgt=stg+rgt-1;
            up_date(1,n,1);
        }
    }
}
int main()
{
    read();
    cin.close();
    cout.close();
    return 0;
}