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++: // ?????¨??????????????????merge/split?????????RBST
#define NDEBUG
#include <algorithm>
#include <cassert>
#include <ctime>
#include <iostream>
#include <string>
#include <tuple>
#include <vector>
#define dump(x) std::cerr << __LINE__ << ":\t" #x " = " << x << std::endl

int32_t xor128() {
  static uint32_t x = 123456789, y = 362436069, z = 521288629, w = time(0);
  uint32_t t = x ^ (x << 11);
  x = y;
  y = z;
  z = w;
  w = (w ^ (w >> 19)) ^ (t ^ (t >> 8));
  return w & 0x3FFFFFFF;
}

using key_t = int;
const key_t INF = 1000000000;
const int MAX_N = 5000010;
enum { L, R };
struct node {
  key_t key;
  node *ch[2];
  int size;
  key_t min;

  static node *const nil;

  node() : node(0) {}

  node(const key_t &x) : key(x), size(1), min(x) { ch[L] = ch[R] = node::nil; }

  node(node *left_, node *right_, int size_, const key_t &min_)
      : size(size_), min(min_) {
    ch[L] = left_;
    ch[R] = right_;
  }

  void *operator new(std::size_t) {
    static node pool[MAX_N];
    static int p = 0;
    return pool + p++;
  }

  bool is_leaf() const { return size == 1; }
};

using np = node *;
using cnp = const node *;
using npair = std::pair<np, np>;

node *const node::nil = new node(nullptr, nullptr, 0, INF);

struct rbst {
  np root;

  rbst() : root(node::nil) {}

  rbst(np root_) : root(root_) {}

  rbst(key_t *left, key_t *right) : root(make_tree(left, right)) {}

  np make_tree(key_t *left, key_t *right) {
    int sz = right - left;
    key_t *mid = left + sz / 2;
    if (sz == 0) {
      return node::nil;
    } else if (sz == 1) {
      return new node(*mid);
    } else {
      np lc = make_tree(left, mid);
      np rc = make_tree(mid, right);
      return new node(lc, rc, sz, std::min(lc->min, rc->min));
    }
  }

  int size() const { return root->size; }

  void set(int k, const key_t &x) { set(root, k, x); }

  void set(np n, int k, const key_t &x) {
    if (n->is_leaf()) {
      n->key = n->min = x;
    } else {
      if (k < n->ch[L]->size)
        set(n->ch[L], k, x);
      else
        set(n->ch[R], k - n->ch[L]->size, x);
      update(n);
    }
  }

  key_t get(cnp n, int k) const {
    if (n->size == 1)
      return n->key;
    else if (k < n->ch[L]->size)
      return get(n->ch[L], k);
    else
      return get(n->ch[R], k - n->ch[L]->size);
  }

  key_t range_min(int l, int r) const { return range_min(root, l, r); }

  key_t range_min(cnp n, int l, int r) const {
    l = std::max(l, 0);
    r = std::min(r, n->size);
    if (l >= r)
      return INF;
    if (l == 0 && r == n->size)
      return n->min;
    key_t res = INF;
    int sl = n->ch[L]->size;
    res = std::min(res, range_min(n->ch[L], l, r));
    res = std::min(res, range_min(n->ch[R], l - sl, r - sl));
    return res;
  }

  // ???????????????????????¨??¢??°??§??¨???????????¶???????????\??????
  np merge(np l, np r) const {
    return l == node::nil ? r : r == node::nil ? l : merge_sub(l, r);
  }

  // ???????????????????????????
  np merge_sub(np l, np r) const {
    // size???????????°????????§?????¨??????????????°??????????????????-1??????
    int sl = l->size - 1, sr = r->size - 1;
    int rand = xor128() % (sl + 1 + sr);
    if (rand < sl) {
      l->ch[R] = merge_sub(l->ch[R], r);
      return update(l);
    } else if (rand == sl) { // ?????????????????¨????????????
      return new node(l, r, l->size + r->size, std::min(l->min, r->min));
    } else {
      r->ch[L] = merge_sub(l, r->ch[L]);
      return update(r);
    }
  }

  // ???????????????????????¨??¢??°??§??¨???????????¶???????????\??????
  npair split(np n, int k) const {
    return n == node::nil ? npair(node::nil, node::nil) : split_sub(n, k);
  }

  // ???????????????????????????
  npair split_sub(np n, int k) const {
    if (n->is_leaf()) {
      return k == 0 ? npair(node::nil, n) : npair(n, node::nil);
    } else if (k < n->ch[L]->size) {
      npair p = split_sub(n->ch[L], k);
      n->ch[L] = p.second;
      return npair(p.first, update(n));
    } else if (k == n->ch[L]->size) {
      return npair(n->ch[L], n->ch[R]);
    } else {
      npair p = split_sub(n->ch[R], k - n->ch[L]->size);
      n->ch[R] = p.first;
      return npair(update(n), p.second);
    }
  }

  np update(np n) const {
    assert(!n->is_leaf());
    n->size = n->ch[L]->size + n->ch[R]->size;
    n->min = std::min(n->ch[L]->min, n->ch[R]->min);
    return n;
  }

  void shift_split_merge(int l, int r) {
    np a, b, c, d;
    std::tie(a, b) = split(root, l);
    std::tie(b, c) = split(b, r - l);
    std::tie(c, d) = split(c, 1);
    np ac = merge(a, c);
    np bd = merge(b, d);
    root = merge(ac, bd);
  }
};

using namespace std;
int main() {
  cin.tie(0);
  ios::sync_with_stdio(0);

  int n, q;
  cin >> n >> q;

  static int a[200010];
  for (int i = 0; i < n; i++)
    cin >> a[i];
  rbst t(a, a + n);

  for (int i = 0; i < q; i++) {
    int x, y, z;
    cin >> x >> y >> z;
    if (x == 0) {
      t.shift_split_merge(y, z);
    }
    if (x == 1) {
      int a = t.range_min(y, z + 1);
      cout << a << '\n';
    }
    if (x == 2) {
      t.set(y, z);
    }
  }
}