#include <bits/stdc++.h>
#include <atcoder/all>
#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#define SELECTER(_1,_2,_3,SELECT,...) SELECT
#define rep1(i,n) for(int i=0;i<int(n);++i)
#define rep2(i,a,n) for(int i=int(a);i<int(n);++i)
#define rep(...) SELECTER(__VA_ARGS__,rep2,rep1)(__VA_ARGS__)
#define RSELECTER(_1, _2, _3, RSELECT, ...) RSELECT
#define rrep1(i,n) for(int i=(int)(n)-1;i>=0;--i)
#define rrep2(i,a,n) for(int i=(int)(n)-1;i>=(int)a;--i)
#define rrep(...) RSELECTER(__VA_ARGS__, rrep2, rrep1)(__VA_ARGS__)
#define all(a) a.begin(),a.end()
#define rall(a) a.rbegin(),a.rend()
#define fi first
#define se second
#define PrintR LogOutput
#ifdef _DEBUG
#define Log(...) LogOutput(__VA_ARGS__)
#else
#define Log(...)
#endif
#define M_PI 3.14159265358979323846
using namespace std;
using namespace atcoder;
using ll=long long;
using ld=long double;
using pii=pair<int,int>;
using pll=pair<long long,long long>;
using pdd=pair<long double,long double>;
using tp=tuple<int,int,int>;
using tpll=tuple<ll,ll,ll>;
using veci=vector<int>;
using vecpii=vector<pair<int,int>>;
using vecll=vector<long long>;
using vecpll=vector<pair<long long,long long>>;
using vecpdd=vector<pair<long double,long double>>;
using vecs=vector<string>;
using vecb=vector<bool>;
using vecd=vector<long double>;
using vectp=vector<tp>;
using vectpll=vector<tpll>;
using mint=modint998244353;
using mint10=modint1000000007;
template<typename T, typename S>
istream& operator>>(istream& in, pair<T, S>& a){return in >> a.first >> a.second;}
template<typename T, typename S>
ostream& operator<<(ostream& out, const pair<T, S>& a){return out << a.first << ' ' << a.second;}
ostream& operator<<(ostream& out, const mint& a){return out << a.val();}
ostream& operator<<(ostream& out, const mint10& a){return out << a.val();}
ostream& operator<<(ostream& out, const modint& a){return out << a.val();}
template<typename T>
ostream& operator<<(ostream& out, const vector<T>& d){for(int i = 0 ; i < d.size() ; ++i) out << d[i] << (i == d.size() - 1 ? "" : " "); return out;}
template<typename T, typename S>
pair<T, S> operator+(const pair<T, S>& a, const pair<T, S>& b){return {a.fi + b.fi, a.se + b.se};}
template<typename T, typename S>
pair<T, S> operator-(const pair<T, S>& a, const pair<T, S>& b){return {a.fi - b.fi, a.se - b.se};}
template<class T> inline bool chmax(T& a,T b){if(a<b) {a=b;return true;} return false;}
template<class T> inline bool chmin(T& a,T b){if(a>b) {a=b;return true;} return false;}
bool Judge(int i, int j, int h, int w){return i < 0 || j < 0 || i >= h || j >= w;}
bool PrintA(int i){cout<<(i ? "Yes" : "No")<<endl;return i;}

constexpr ll INF=numeric_limits<ll>::max() >> 2;
constexpr int inf=numeric_limits<int>::max() >> 1;
constexpr ll MOD=998244353;
const int vi[] = {0, 1, 0, -1}, vj[] = {1, 0, -1, 0};

template<typename... Args>
void LogOutput(Args&&... args){
	stringstream ss;
	((ss << args << ' '), ...);
	cout << ss.str().substr(0, ss.str().length() - 1) << endl;
}
template<typename T>
void LogOutput(vector<vector<T>>& data){for(auto d : data) LogOutput(d);}

template<int bit_size>
struct Binary_Trie{
	struct Node{
		Node() : size(0), end_word(0){memset(nx, -1, sizeof(nx));}
		int nx[2];
		int size;
		int end_word;
	};
	std::vector<Node> nodes;
	int root;
	Binary_Trie() : root(0){nodes.push_back(Node());}
	void insert(ll k){
		int now = root;
		for(int i = bit_size - 1 ; i >= 0; --i){
			int c = k >> i & 1;
			if(nodes[now].nx[c] == -1){
				nodes[now].nx[c] = (int)nodes.size();
				nodes.push_back(Node());
			}
			++nodes[now].size;
			now = nodes[now].nx[c];
		}
		++nodes[now].size;
		++nodes[now].end_word;
	}

	bool search(ll k){
		int now = root;
		for(int i = bit_size - 1 ; i >= 0; --i){
			int c = k >> i & 1;
			int nx = nodes[now].nx[c];
			if(nx == -1 || nodes[now].size == 0) return false;
			now = nx;
		}
		if(nodes[now].end_word == 0) return false;
		return true;
	}

	void erase(ll k){
		if(!search(k)) return;
		int now = root;
		for(int i = bit_size - 1 ; i >= 0; --i){
			int c = k >> i & 1;
			int nx = nodes[now].nx[c];
			--nodes[now].size;
			now = nx;
		}
		--nodes[now].size;
		--nodes[now].end_word;
	}

	ll get(int k){
		int cur = root;
		ll res = 0;
		for(int i = bit_size - 1 ; i >= 0; --i){
			if(nodes[cur].nx[0] != -1){
				if(nodes[nodes[cur].nx[0]].size >= k){
					cur = nodes[cur].nx[0];
				}else{
					k -= nodes[nodes[cur].nx[0]].size;
					cur = nodes[cur].nx[1];
					res++;
				}
			}else{
				cur = nodes[cur].nx[1];
				res++;
			}
			res <<= 1;
		}
		return res >> 1;
	}
};

int main(){
	ios::sync_with_stdio(false);
	std::cin.tie(nullptr);
	int n, q;cin>>n>>q;
	vecll a(n);
	rep(i, n) cin>>a[i];
	Binary_Trie<61> t;
	vecll ans;
	set<int> st;
	rep(i, n) st.insert(i);
	int u = 1;
	rep(i, q){
		int ty;cin>>ty;
		if(ty == 1){
			int k;
			ll x;cin>>k>>x;
			k--;
			st.insert(k);
			a[k] = x;
		}else if(ty == 2){
			if(u) u = 0;
			else for(auto it = st.rbegin(); it != st.rend(); ++it) t.erase(t.get(*it + 1));
			for(auto v : st) t.insert(a[v]);
			st.clear();
		}else{
			int k;cin>>k;
			k--;
			if(st.find(k) != st.end()) ans.push_back(a[k]);
			else ans.push_back(t.get(k + 1));
		}
	}
	for(auto v : ans) cout<<v<<endl;
}