Go: package main

// packed from [splaytree.go main.rmq.go splaytree_debug.go] with goone.

import (
	"bufio"
	"fmt"
	"io"
	"os"
	"strconv"
	"strings"
)

type SplayTreeNode struct {
	parent, left, right *SplayTreeNode

	size    int
	value   int
	minimum int
}

func newSplayTreeNode(v int) *SplayTreeNode {
	return &SplayTreeNode{value: v}
}

func (node *SplayTreeNode) rotate() {
	var pp, p, c *SplayTreeNode
	p = node.parent
	pp = p.parent
	if pp != nil && pp.left == p {
		pp.left = node
	}
	if pp != nil && pp.right == p {
		pp.right = node
	}
	node.parent = pp
	if p.left == node {
		c = node.right
		node.right = p
		p.left = c
	} else {
		c = node.left
		node.left = p
		p.right = c
	}
	p.parent = node
	if c != nil {
		c.parent = p
	}
	p.update()
	node.update()
}

func (node *SplayTreeNode) state() int {
	if node.parent == nil {
		return 0
	}
	if node.parent.left == node {
		return -1
	} else if node.parent.right == node {
		return 1
	}
	return 0
}

func (node *SplayTreeNode) splay() {
	for node.state() != 0 {
		if node.parent.state() == 0 {
			node.rotate()
			return
		}
		if node.state() == node.parent.state() {
			node.parent.rotate()
			node.rotate()
		} else {
			node.rotate()
			node.rotate()
		}
	}
}

func (node *SplayTreeNode) update() {
	node.size = 1
	node.minimum = node.value
	if node.left != nil {
		node.size += node.left.size
		node.minimum = min(node.minimum, node.left.minimum)
	}
	if node.right != nil {
		node.size += node.right.size
		node.minimum = min(node.minimum, node.right.minimum)
	}
}
func min(a, b int) int {
	if a < b {
		return a
	}
	return b
}

func (node *SplayTreeNode) Get(idx int) *SplayTreeNode {
	cur := node
	for true {
		lSize := 0
		if cur.left != nil {
			lSize = cur.left.size
		}
		if idx < lSize {
			cur = cur.left
		}
		if lSize == idx {
			cur.splay()
			return cur
		}
		if idx > lSize {
			cur = cur.right
			idx = idx - lSize - 1
		}
	}
	return nil
}

func mergeSplayNode(l, r *SplayTreeNode) (root *SplayTreeNode) {
	if l == nil {
		return r
	}
	if r == nil {
		return l
	}
	root = l.Get(l.size - 1)
	root.right = r
	r.parent = root
	root.update()
	return root
}

func (node *SplayTreeNode) Split(leftCount int) (left *SplayTreeNode, right *SplayTreeNode) {
	root := node.Get(leftCount)
	lRoot, rRoot := root.left, root

	rRoot.left = nil
	if lRoot != nil {
		lRoot.parent = nil
	}
	rRoot.update()
	return lRoot, rRoot
}

func splayTreeInsert(t *SplayTreeNode, idx int, node *SplayTreeNode) (root *SplayTreeNode) {
	l, r := t.Split(idx)
	return mergeSplayNode(
		mergeSplayNode(l, node),
		r,
	)
}

func removeSplayTree(t *SplayTreeNode, idx int) (root *SplayTreeNode, removed *SplayTreeNode) {
	target := t.Get(idx)
	l, r := target.left, target.right
	if l != nil {
		l.parent = nil
	}
	if r != nil {
		r.parent = nil
	}
	target.left = nil
	target.right = nil
	target.update()
	return mergeSplayNode(l, r), target
}

const (
	initialBufSize = 100000
	maxBufSize     = 1000000
)

var sc *bufio.Scanner

func initScanner(r io.Reader) *bufio.Scanner {
	buf := make([]byte, initialBufSize)

	sc := bufio.NewScanner(r)
	sc.Buffer(buf, maxBufSize)
	sc.Split(bufio.ScanWords)
	return sc
}

func main() {
	sc = initScanner(os.Stdin)
	resolve()
}

func resolve() {
	n := scanInt(sc)
	q := scanInt(sc)
	table := newDebugNodeSlice(200001)
	for i := 0; i < n; i++ {
		table.l[i].parent = &table.l[i+1]
		table.l[i+1].left = &table.l[i]
		table.l[i].update()
		table.l[i+1].update()
	}
	var root *SplayTreeNode = &table.l[n]
	for i := 0; i < n; i++ {
		table.l[i].value = scanInt(sc)
		table.l[i].update()
	}
	table.l[n].update()
	for i := 0; i < q; i++ {
		switch scanInt(sc) {
		case 0:
			root = shift(root, scanInt(sc), scanInt(sc))
		case 1:
			l := scanInt(sc)
			r := scanInt(sc)
			tmp, rRoot := root.Split(r + 1)
			lRoot, cRoot := tmp.Split(l)
			fmt.Println(cRoot.minimum)
			root = mergeSplayNode(mergeSplayNode(lRoot, cRoot), rRoot)
		case 2:
			root = root.Get(scanInt(sc))
			root.value = scanInt(sc)
			root.update()
		}
	}
}


C++: #include<bits/stdc++.h>
using namespace std;
using Int = long long;
int xor128(){
  static int x = 123456789;
  static int y = 362436069;
  static int z = 521288629;
  static int w = 88675123; 
  int t;
   
  t = x ^ (x << 11);
  x = y; y = z; z = w;
  return w = (w ^ (w >> 19)) ^ (t ^ (t >> 8));
}

template<typename T,typename E>
struct RBST{
  typedef function<T(T,T)> F;
  typedef function<T(T,E)> G;
  typedef function<E(E,E)> H;
  typedef function<E(E,size_t)> P;

  F f;
  G g;
  H h;
  P p;
  T d1;
  E d0;
  
  struct Node{
    Node *l,*r;
    size_t cnt;
    T val,dat;
    E laz;
    Node():cnt(0){l=r=nullptr;}
    Node(T val,E laz):
      cnt(1),val(val),dat(val),laz(laz){l=r=nullptr;}
  };

  const size_t LIM = 1e6;
  vector<Node> pool;
  size_t ptr;

  RBST(F f,G g,H h,P p,T d1,E d0):
    f(f),g(g),h(h),p(p),d1(d1),d0(d0),pool(LIM),ptr(0){}

  Node* build(size_t l,size_t r,vector<T> &v){
    if(l+1==r) return create(v[l]);
    size_t m=(l+r)>>1;
    return merge(build(l,m,v),build(m,r,v));
  }
  
  Node* build(vector<T> &v){
    return build(0,v.size(),v);
  }
  
  Node* create(){
    return &pool[ptr++];
  }
  
  Node* create(T v){
    return &(pool[ptr++]=Node(v,d0));
  }
  
  size_t count(const Node* a){
    if(a==nullptr) return 0;
    return a->cnt;
  }

  Node* insert(Node* a,size_t pos,T v){
    Node* b=create(v);
    auto s=split(a,pos);
    return a=merge(merge(s.first,b),s.second);
  }

  Node* erase(Node* a,size_t pos){
    auto s=split(a,pos);
    auto t=split(s.second,1);
    return merge(s.first,t.second);
  }

  T query(const Node *a){
    if(a==nullptr) return d1;
    return a->dat;
  }

  Node* update(Node* a){
    if(a==nullptr) return a;
    Node *l=a->l,*r=a->r;
    if(a->laz!=d0){ 
      a->val=g(a->val,p(a->laz,1));
      if(l!=nullptr){
	l->laz=h(l->laz,a->laz);
	l->val=g(l->val,p(l->laz,1));
	l->dat=g(l->dat,p(l->laz,count(l)-1));
	l->dat=f(l->val,l->dat);
      }
      if(r!=nullptr){
	r->laz=h(r->laz,a->laz);
	r->val=g(r->val,p(r->laz,1));
	r->dat=g(r->dat,p(r->laz,count(r)-1));
	r->dat=f(r->val,r->dat);
      }
      a->laz=d0;
    }
    a->cnt=count(l)+count(r)+1;
    a->dat=f(a->val,f(query(l),query(r)));
    return a;
  }

  T query(Node *&a,size_t l,size_t r){
    auto s=split(a,l);
    auto t=split(s.second,r-l);
    auto u=t.first;
    T res=query(u);
    a=merge(s.first,merge(t.first,t.second));
    return res;
  }
  
  void update(Node *&a,size_t l,size_t r,E v){
    auto s=split(a,l);
    auto t=split(s.second,r-l);
    auto u=t.first;
    u->laz=h(u->laz,v);
    update(u);
    a=merge(merge(s.first,u),t.second);
  }

  void dump(Node* a,typename vector<T>::iterator it){
    if(!count(a)) return;
    update(a);
    dump(a->l,it);
    *(it+count(a->l))=a->val;
    dump(a->r,it+count(a->l)+1);
  }
  
  vector<T> dump(Node* a){
    vector<T> v(count(a));
    dump(a,v.begin());
    return v;
  }

  Node* merge(Node* a,Node* b){
    if(a==nullptr) return b;
    if(b==nullptr) return a;
    if(xor128()%(count(a)+count(b))<count(a)){
      a=update(a);
      a->r=merge(a->r,b);
      return update(a);
    }
    b=update(b);
    b->l=merge(a,b->l);
    return update(b);
  }

  pair<Node*, Node*> split(Node* a,size_t k){
    if(a==nullptr) return make_pair(a,a);
    update(a);
    if(k<=count(a->l)){
      auto s=split(a->l,k);
      a->l=s.second;
      return make_pair(s.first,update(a));
    }
    auto s=split(a->r,k-(count(a->l)+1));
    a->r=s.first;
    return make_pair(update(a),s.second);
  } 
  
};

struct FastIO{
  FastIO(){
    cin.tie(0);
    ios::sync_with_stdio(0);
  }
}fastio_beet;

//INSERT ABOVE HERE
signed AOJ_1508(){
  int n,q;
  cin>>n>>q;
  vector<int> v(n);
  for(int i=0;i<n;i++) cin>>v[i];
  
  RBST<int, int>::F f=[](int a,int b){return min(a,b);};
  RBST<int, int>::G g=[](int a,int b){return b<0?a:b;};
  RBST<int, int>::H h=[](int a,int b){return b<0?a:b;};
  RBST<int, int>::P p=[](int a,size_t b){++b;return a;};
  const int INF = 1e9;
  RBST<int, int> rbst(f,g,h,p,INF,-1);

  auto root=rbst.build(v);
  
  for(int i=0;i<q;i++){
    int x,y,z;
    cin>>x>>y>>z;
    if(x==0){
      int v=rbst.query(root,z,z+1);
      root=rbst.erase(root,z);
      root=rbst.insert(root,y,v);
    }
    if(x==1){
      cout<<rbst.query(root,y,z+1)<<endl;
    }
    if(x==2){
      rbst.update(root,y,y+1,z);
    }
  }
  
  return 0;
}
/*
  verified on 2018/02/17
  judge.u-aizu.ac.jp/onlinejudge/description.jsp?id=1508
*/

signed main(){
  AOJ_1508();
  return 0;
}