#include <bits/stdc++.h>
#include <fstream>

using namespace std;
#define ll long long

ifstream fin("arbint.in");
ofstream fout("arbint.out");

int main() {
    ll n, m, v[1005];
    fin>>n>>m;
    for (ll i = 0;i < n;i++) fin>>v[i];
    for (ll i = 0;i < m;i++)
    {
        ll c, a, b;
        fin>>c>>a>>b;
        if (c == 0)
        {
            ll maxim = 0;
            for (ll j = a-1;j <= b-1;j++)
                if (v[j] >= maxim)
                    maxim = v[j];
            fout<<maxim<<endl;
        }
        if (c == 1)
        {
            v[a-1] = b;
        }
    }
    return 0;
}