#include <fstream>
using namespace std;
ifstream fin("data.in");
ofstream fout("data.out");
int main()
{int a[1000],max1,n,m,i,j,b,d,c;
   fin>>n>>m;
   for(i=1;i<=n;i++)
    fin>>a[i];
   for(i=1;i<=m;i++)
   {fin>>c>>b>>d;
     if(c==1)
       a[b]=a[d];
          else
       {   max1=0;
           for(j=b;j<=d;j++)
           if (max1<a[j])
            max1=a[j];
            fout<<max1<<endl;
       } }
    return 0;
}