#include <bits/stdc++.h>
using namespace std;
ifstream fin("marbles.in");
ofstream fout("marbles.out");
int a[100001], fr[65];
int n, m;


void Init()
{
    for(int i = 1; i <= 65;i++)
        fr[i] = 0;
}


void Mutare(int x, int y)
{
    a[y + x] = a[x];
    a[x] = 0;
}

void Query(int x, int y)
{
    int maxim = 0;
    for(int i = x; i <= y;i++)
        if(a[i] != 0) fr[a[i]]++, maxim = max(maxim, fr[a[i]]);
    fout << maxim <<"\n";
}


void Citire()
{
    int i, x, y, task;
    fin >> n >> m;
    for(i = 1; i <= n;i++)  
    {
        fin >> x >> y;
        a[x] = y;
    }
    for(i = 1;i <= m;i++)
    {
        Init();
        fin >> task >> x >> y;
        if(task == 0) Mutare(x , y);
        else Query(x , y);
    }
}


void Rezolvare()
{
    
}

int main()
{
    Citire();
    Rezolvare();
    return 0;
}