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