#include <iostream>
#include <fstream>

#define NMAX 100000 //o suta de mii

using namespace std;

ifstream fin ("hotel.in");
ofstream fout ("hotel.out");

struct element{
    int dimLeft;
    int dimRight;
    int dimInd;
};

int A, B;
int valUpdate;
element tree[4 * NMAX + 1]; //tine cati sunt disponibili pe fiecare interval

element rezultant(element X, element Y, int dim1, int dim2){
    element rez;

    if(X.dimLeft == dim1){
        rez.dimLeft = X.dimLeft + Y.dimLeft;
    }
    else {
        rez.dimLeft = X.dimLeft;
    }

    if(Y.dimRight == dim2){
        rez.dimRight = Y.dimRight + X.dimRight;
    }
    else {
        rez.dimRight = Y.dimRight;
    }

    rez.dimInd = max(X.dimInd, Y.dimInd);
    rez.dimInd = max(rez.dimInd, X.dimRight + Y.dimLeft);

    return rez;
}


void update(int node, int left, int right){
    if(left == right){
        if(valUpdate == 1){ //daca adaug pe cineva in camera
            tree[node].dimLeft = tree[node].dimRight = tree[node].dimInd = 0; //0, adica nu mai e liber aici
        }
        else {
            tree[node].dimLeft = tree[node].dimRight = tree[node].dimInd = 1; //1, adica am eliberat aici
        }

        return;
    }

    int mid = left + (right - left) / 2;
    if(A <= mid){
        //si fiul din stanga e relevant
        update(node * 2, left, mid);
    }
    if(B > mid){
        //si fiul din dreapta e relevant
        update(node * 2 + 1, mid + 1, right);
    }

    tree[node] = rezultant(tree[node * 2], tree[node * 2 + 1], mid - left + 1, right - mid);
}

void buildArbore(int node, int left, int right){
    tree[node].dimLeft = tree[node].dimInd = tree[node].dimRight = right - left + 1;

    if(left == right){
        return;
    }

    int mid = left + (right - left) / 2;
    buildArbore(node * 2, left, mid);
    buildArbore(node * 2 + 1, mid + 1, right);
}

int main()
{
    int N, P;
    fin >> N >> P;

    buildArbore(1, 1, N);

    for(int q = 1; q <= P; q++){
        int tip;
        fin >> tip;

        if(tip == 1 || tip == 2){
            int i, M;
            fin >> i >> M;

            //globale:
            A = i;
            B = i + M - 1;

            valUpdate = 2 - tip; //1 daca tip == 1 si 0 daca tip == 2
            update(1, 1, N);
        }
        else {
            //query
            fout << tree[1].dimInd << "\n";
        }
    }

    return 0;
}