#include<iostream>
#include<cstdio>
#include<climits>
#define int unsigned long long
using namespace std;
typedef pair<int,int> PII;
const int MX=1000100;
const int inf=0x3fffffff;
const int LIM=-1;

int N, Q, cnt=0;
int ar[MX];
int t[4*MX], tv[4*MX]; //t[i]: &[l,r], tv[i]: 1/0
int tag[4*MX];
int read()
{
    int r=0, f=1; char ch=getchar();
    while(ch<'0'||ch>'9') {if(ch=='-') f=-1; ch=getchar();}
    while(ch>='0'&&ch<='9') {r=r*10+ch-'0'; ch=getchar();}
    return r*f;
}
void bt(int n, int s, int e)
{
    if(s==e) 
    {
        t[n]=ar[s]; 
        tv[n]=~ar[s];
        tag[n]=-1;
        return;
    }
    int mid=(s+e)>>1, ln=2*n, rn=2*n+1;
    bt(ln,s,mid); bt(rn,mid+1,e);
    tag[n]=-1;
    t[n]=t[ln]&t[rn];
    tv[n]=(t[ln]&tv[rn])|(t[rn]&tv[ln]);
}
void pd(int n, int s, int e)
{
    if(tag[n]==-1) return;
    int mid=(s+e)>>1, ln=2*n, rn=2*n+1;
    int v=tag[n];
    tv[ln]=(t[ln]&(~v))|(tv[ln]&v);
    tv[rn]=(t[rn]&(~v))|(tv[rn]&v);
    t[ln]&=v; t[rn]&=v;
    if(mid==s) tv[ln]=~t[ln];
    if(mid+1==e) tv[rn]=~t[rn];
    tag[ln]&=v; tag[rn]&=v;
    tag[n]=-1;
}
void upd(int n, int s, int e, int L, int R, int v, int tpe)
{
    if(s>=L&&e<=R)
    {
        if(tpe==1)
        {
            if(s==e) tv[n]=~(t[n]&v);
            else tv[n]=(t[n]&(~v))|(tv[n]&v);
            t[n]&=v; tag[n]&=v;
        }
        else 
        {
            t[n]=v; tv[n]=~v; tag[n]=-1;
        }
        return;
    }
    else if(s>R||e<L) return;
    int mid=(s+e)>>1, ln=2*n, rn=2*n+1;
    pd(n,s,e);
    upd(ln,s,mid,L,R,v,tpe);
    upd(rn,mid+1,e,L,R,v,tpe);
    t[n]=t[ln]&t[rn];
    tv[n]=(t[ln]&tv[rn])|(t[rn]&tv[ln]);
}
PII asktv(int n, int s, int e, int L, int R)
{
    if(s>R||e<L) return {LIM,LIM};
    if(s>=L&&e<=R) return {t[n],tv[n]};
    int mid=(s+e)>>1, ln=2*n, rn=2*n+1;
    pd(n,s,e);
    auto [t1,v1]=asktv(ln,s,mid,L,R);
    auto [t2,v2]=asktv(rn,mid+1,e,L,R);
    if(R<=mid) return {t1,v1};
    if(L>mid) return {t2,v2};
    return {t1&t2,(t1&v2)|(t2&v1)};
}
int askp(int n, int s, int e, int L, int R, int v)
{
    // cout << "n=" << n << ", s=" << s << ", e=" << e << ", L=" << L << ", R=" << R << ", v=" << v << '\n';
    if(!(tv[n]&v)&&s>=L&&e<=R) return LIM;
    if(s==e) return t[n];
    int mid=(s+e)>>1, ln=2*n, rn=2*n+1;
    pd(n,s,e);
    if(L>mid) return askp(rn,mid+1,e,L,R,v);
    if(R<=mid) return askp(ln,s,mid,L,R,v);
    int res=askp(ln,s,mid,L,R,v);
    return res==LIM?askp(rn,mid+1,e,L,R,v):res;
}
signed main()
{
    // freopen("testdata.in","r",stdin);
    N=read(); Q=read();
    for(int i=1;i<=N;i++) ar[i]=read();
    bt(1,1,N);
    while(Q--)
    {
        int opt=read();
        if(opt==1)
        {
            int l=read(), r=read(), x=read();
            upd(1,1,N,l,r,x,1);
        }
        if(opt==2)
        {
            int s=read(), x=read();
            // cout << "bef: "; for(int i=1;i<=N;i++) cout << ask(1,1,N,i,i) << " "; cout << '\n';
            upd(1,1,N,s,s,x,2);
            // cout << "aft: "; for(int i=1;i<=N;i++) cout << ask(1,1,N,i,i) << " "; cout << '\n';
        }
        if(opt==3)
        {
            // cout << "ar: "; for(int i=1;i<=N;i++) cout << ask(1,1,N,i,i) << " "; cout << '\n';
            cnt++;
            int l=read(), r=read();
            auto [v,sum]=asktv(1,1,N,l,r);
            // cout << "v, sum=" << v << " "  << sum << '\n';
            if(!sum) {cout << v << '\n'; continue;}
            for(int j=62;;j--)  //top digit
            {
                if((1ll<<j)&sum)
                {
                    int p=askp(1,1,N,l,r,(1ll<<j));
                    if(cnt==20) cout << "p=" << p << ", j=" << j << ", sum=" << sum << '\n';
                    for(int k=j;k!=-1;k--)
                    {
                        if (((1ll<<k)&sum) && (!((1ll<<k)&p)))
                            v|=(1ll<<k);
                    }
                    cout << v << '\n';
                    break;
                }
            }
        }
    }
    return (0-0);
}