#include <iostream>
#include <fstream>

using namespace std;

ifstream fin("arbint.in");
ofstream fout("arbint.out");
int maximum(int t[100000], int u, int v)
{
    int p=t[u];
    for (int i=u+1;i<v+1;i++)
    {
        if (p<t[i]){p=t[i];}
    }
    return p;
}

int main()
{
    int m,n,x,y,z;
    int a[100000];

    fin>>n>>m;
        for (int i=1;i<n+1;i++)
        {
            fin>>a[i];
        }
    for (int i=1;i<m+1;i++)
    {
        fin>>x>>y>>z;
        if (x==0){fout<<maximum(a,y,z)<<endl;} else {a[y]=z;}
    }
return 0;
}