#include <fstream>
#include <set>
#include <algorithm>
#include <map>
#include <vector>
using namespace std;
ifstream cin("marbles.in");
ofstream cout("marbles.out");
int N,M,op,x,y,c,cmax,ans,nr,cx,cy;
vector <int> v[70];
int stanga(int val, int cul); //
int dreapta(int val, int cul); //
int main()
{
    cin>>N>>M;
    for(int i=1; i<=N; ++i)
    {
        cin>>x>>c;
        cmax=max(c,cmax);
        v[c].push_back(x);
    }
    for(int I=1; I<=cmax; ++I)
        sort(v[I].begin(), v[I].end());
    for(int i=1; i<=M; ++i)
    {
        cin>>op>>x>>y;
        if(op==1)
        {
            ans=0;
            for(int I=1; I<=cmax; ++I) {
                c=I;
                ///fata ia la
                cy=stanga(y,c);
                ///fata ia la
                cx=dreapta(x,c);
                ///uite asa se joaca, la noi, brasoveanca
                nr=cy-cx+1;
                if(nr<0)
                    nr=0;
                ans=max(nr,ans);
            }
            cout<<ans<<'\n';
        }
        else{
            for(int I=1; I<=cmax; ++I)
            {
                c=I;
                cx=dreapta(x,c);
                if(cx!=0 && v[c][cx]==x)
                {
                    cx=dreapta(x,c);
                    v[c][cx]=y;
                    break;
                }
            }
        }
    }
    return 0;
}

int stanga(int val, int cul)
{
    int st=0, dr=v[cul].size()-1, mij=0,poz=0;
    while(st<=dr)
    {
        mij=(st+dr)/2;
        if(v[cul][mij]<=val)
            poz=mij, st=mij+1;
        else dr=mij-1;
    }
    return poz;
}

int dreapta(int val, int cul)
{
    int st=0, dr=v[cul].size()-1, mij=0, poz=0;
    while(st<=dr)
    {
        mij=(st+dr)/2;
        if(v[cul][mij]>=val)
            poz=mij, dr=mij-1;
        else st=mij+1;
    }
}