#include<bits/stdc++.h>
using namespace std;
ifstream f("Date.in");
ofstream g("date.out");
vector <int> v;

int getMax(int a,int b,vector<int>v)
    {
        int max=0;
        for(int i=a;i<=b;i++)
            if(v[i]>max)
                max=v[i];
        return max;
    }
int main()
{
    int x,a,b,n,m,aux;
    f>>n>>m;
    v.push_back(0);
    for(int i=1;i<=n;i++)
        {f>>aux;
        v.push_back(aux);
        }

    for(int i=1;i<=m;i++)
    {
        f>>x>>a>>b;
        if(x==0)
            g<<getMax(a,b,v)<<endl;
        else if(x==1)
            v[a]=v[b];
    }
    return 0;


}