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#include <fstream>
using namespace std;
ifstream cin("arbint.in");
ofstream cout("arbint.out");
int A[100010];
int main()
{
int n,m;
cin>>n>>m;
for (int i=1; i<=n; i++){
cin>>A[i];
}
for (int i=1; i<=m; i++){
int x, a, b;
cin>>x>>a>>b;
if (x==0){
int MAX=0;
for (int k=a; k<=b; k++){
if (A[k]>MAX){
MAX=A[k];
}
}
cout<<MAX<<'\n';
}
else{
A[a]=b;
}
}
return 0;
}