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#include <fstream>
#include<queue>
#include<iostream>
using namespace std;
ifstream fin("arbint.in");
ofstream fout("arbint.out");
int main()
{
priority_queue<int>q;
int a[100000];
int m,n;
fin>>n>>m;
for(int i=1;i<=n;i++)
fin>>a[i];
int x,y,z;
for(int i=0;i<m;i++)
{
fin>>x>>y>>z;
if(x==1)
a[y]=z;
if(x==0)
{
for(int j=y;j<=z;j++)
q.push(a[j]);
fout<<q.top()<<'\n';
q = priority_queue <int>();
}
}
return 0;
}