#include<fstream>
#include<iostream>
#define for(i,a,b) for(int i=a;i<=b;i++)


int n,m,a,b,v[100011],o,maxim;
using namespace std;

void max(int a, int b)
{
	maxim=v[a];
	for(i,a+1,b)
		if(v[i]>maxim)
			maxim=v[i];
	 
}

int main()
{
	ifstream in("arbint.in");
    ofstream out("arbint.out");
	in>>n>>m;
	for(i,1,n)
		in>>v[i];
	for(i,1,m)
	{
		in>>o>>a>>b;
		if(o==0)
		{
			max(a,b);
		    out<<maxim<<"\n";
		}
			else
			v[a]=b;
	}
	
	in.close();
	return 0;
}