#include<iostream>
#include<vector>
#include<algorithm>
using namespace std;



template<typename type,typename val_type,typename return_type, typename LazyType, typename update_policy, typename query_policy, typename lazy_policy >
class segment_tree
{

	vector<type> data;

	vector<LazyType> lazy;

	update_policy _update_policy;
	query_policy _query_policy;
	lazy_policy _lazy_policy;

public:
	
	void create(const vector<type> &vec)
	{
		data.resize(vec.size() * 4);

		lazy.resize(vec.size() * 4);

		for (int i = 0; i < vec.size() * 4; ++i)
		{
			_lazy_policy.clear(lazy[i]);
		}

		for (int i = 0; i < vec.size(); ++i)
		{
			update(i + 1, i + 1, vec[i], 1, vec.size(), 1);
		}
	}

	void update(int a, int b, val_type v, int x, int y, int k=1)
	{
		_lazy_policy.to(data[k], lazy[k]);
		
		if (x != y)
		{	
			_lazy_policy.propagate(data[k], data[k * 2], data[k * 2 + 1]);
		}
		_lazy_policy.clear(lazy[k]);

		if (a <= x && y <= b)
		{
			
			_update_policy.set(data[k], v);

			_lazy_policy.set(lazy[k], v);

			return;
		}


		int mid = (x + y) / 2;

		if (a <= mid)
		{
			update(a, b, v, x, mid, k * 2);
		}

		if (b > mid)
		{
			update(a, b, v, mid + 1, y, k * 2 + 1);
		}

		_lazy_policy.to(data[k*2], lazy[k*2]);

		if(k*4 < data.size() && k*4+1 < data.size())
			_lazy_policy.propagate(data[k * 2], data[k * 4], data[k * 4 + 1]);

		_lazy_policy.clear(data[k*2]);



		_lazy_policy.to(data[k * 2 + 1], lazy[k * 2 + 1]);

		if (k * 4 + 2 < data.size() && k * 4 + 3 < data.size())
			_lazy_policy.propagate(data[k *2 + 1], data[k * 4 + 2], data[k * 4 + 3]);

		_lazy_policy.clear(data[k*2+1]);

		_update_policy.set(data[k], data[k * 2], data[k * 2 + 1]);
	}

	return_type query(int a, int b, int x, int y, int k=1)
	{

		_lazy_policy.to(data[k], lazy[k]);

		if (x != y)
		{
			_lazy_policy.propagate(data[k], data[k * 2], data[k * 2 + 1]);
		}
		_lazy_policy.clear(lazy[k]);

		if (a <= x && y <= b)
		{

			return _query_policy.get(data[k]);
		}


		int mid = (x + y) / 2;


		if (a <= mid && b > mid)
		{
			return_type rt1 = query(a, b, x, mid, k * 2);

			return_type rt2 = query(a, b, mid + 1, y, k * 2 + 1);

			return _query_policy.get(rt1, rt2);
		}

		if (a <= mid)
		{
			

			return query(a, b, x, mid, k * 2);
		}
		else
		{
			return query(a, b, mid + 1, y, k * 2 + 1);
		}



	}
};


class update_policy
{
public:
	void set(int& node, const int val)
	{
		node = val;
	}

	void set(int &node, const int child_left_node, const int child_right_node)
	{
		node = max(child_left_node, child_right_node);
	}
};

class query_policy
{
public:
	int get(const int node)
	{
		return node;
	}

	int get(const int child_left_node, const int child_right_node)
	{
		return max(child_left_node, child_right_node);
	}
};

class lazy_policy
{
public:
	void clear(int& node)
	{

	}

	void to(int& node, const int value)
	{

	}

	void set(int& node, const int value)
	{

	}

	void propagate(int& node, int& child_left_node, int& child_right_node)
	{
	}
};

segment_tree<int, int, int, int,update_policy, query_policy,lazy_policy> segmentTree;

int main()
{


	#ifndef LOCAL_JUDGE
		freopen("arbint.in", "r", stdin);
		freopen("arbint.out", "w", stdout);
	#endif

	int N,  M;

	cin >> N >> M;
	
	vector<int> vec;

	for (int i = 1; i <= N; ++i)
	{
		int x;

		cin >> x;

		vec.push_back(x);
	}

	segmentTree.create(vec);

	for (int i = 1; i <= M; ++i)
	{
		int op, a, b;

		cin >> op >> a >> b;

		if (op == 0)
		{
			cout << segmentTree.query(a, b, 1, N) <<"\n";
		}
		else
		{
			segmentTree.update(a, a, b, 1, N);
		}
	}

	return 0;
}