#include <fstream>
#define DIM 2*100000+5
using namespace std;
ifstream fi("hotel.in");
ofstream fo("hotel.out");
int n,p;
int tip,a,b;
int A[DIM]/*secv maxima cu camere libere*/,B[DIM]/*camere libere inceput*/, C[DIM]/*camere libere sfarsit*/,N[DIM]/*numarul total de camere*/;
void init(int nod,int l,int r)
{
    if(l>r)
        return;
    if(l==r)
    {
        A[nod]=B[nod]=C[nod]=N[nod]=1;
        return;
    }
    A[nod]=B[nod]=C[nod]=N[nod]=r-l+1;
    init(nod*2,l,(l+r)/2);
    init(2*nod+1,(l+r)/2+1,r);
}
void update(int nod,int st,int dr,int val,int l,int r)
{
    if(dr<l||st>r)
        return;
    if(st == dr)
        A[nod]=B[nod]=C[nod]=val;
    else
    {
        update(2*nod,st,(st+dr)/2,val,l,r);
        update(2*nod+1,(st+dr)/2+1,dr,val,l,r);
        B[nod]=B[2*nod];
        if(B[2*nod]==N[2*nod])
            B[nod]+=B[2*nod+1];
        C[nod]=C[2*nod+1];
        if(C[2*nod+1]==N[2*nod+1])
            C[nod]+=C[2*nod];
        A[nod]=max(max(A[2*nod],A[2*nod+1]), C[2*nod]+B[2*nod+1]);
    }
}
int main()
{
    fi>>n>>p;
    init(1,1,n);
    for(int q=1;q<=p;q++)
    {
        fi>>tip;
        if(tip==1||tip==2)
        {
            fi>>a>>b;
            int q=0;
            if(tip==2) q=1;
            update(1,1,n,q,a,a+b-1);
        }
        else
            fo<<A[1]<<"\n";
    }
    fi.close();
    fo.close();
    return 0;
}