Language: C++

#include <cstdlib>
#include <cmath>
#include <climits>
#include <cfloat>
#include <map>
#include <utility>
#include <set>
#include <iostream>
#include <memory>
#include <string>
#include <vector>
#include <algorithm>
#include <functional>
#include <sstream>
#include <deque>
#include <complex>
#include <stack>
#include <queue>
#include <cstdio>
#include <cctype>
#include <cstring>
#include <ctime>
#include <iterator>
#include <bitset>
#include <numeric>
#include <list>
#include <iomanip>
#include <cassert>
#include <array>
#include <tuple>
#include <initializer_list>
#include <unordered_set>
#include <unordered_map>
#include <forward_list>
using ll = long long;
#define rep(j,k) for (int j = 0; j < (int)(k); j++)

namespace RBST {
    using Key = int;
    
    struct Node {
        Key key;
        Node *left, *right;
        int size;
        Key min;
    };

    const Key INF = 1e9;
    using Np = Node*;
    using pair = std::pair<Np, Np>;

    const Np const NIL = new Node{ Key(), nullptr, nullptr, 0, INF };

    int size(Np n) { return n->size; }

    Key min(Np n) { return n->min; }

    void update(Np n) {
        n->size = 1 + size(n->left) + size(n->right);
        n->min = std::min({ min(n->left), n->key, min(n->right) });
    }

    void assign(Np n, int k, Key x) {
        if (k < size(n->left)) assign(n->left, k, x);
        else if (size(n->left) == k) n->key = x;
        else assign(n->right, k - size(n->left) - 1, x);
        update(n);
    }

    Key min(Np n, int l, int r) {
        l = std::max(l, 0);
        r = std::min(r, size(n));
        if (l >= r) return INF;
        if (l == 0 && r == size(n)) return min(n);

        Key res = INF;
        int sl = size(n->left);
        res = std::min(res, min(n->left, l, r));
        res = std::min(res, min(n->right, l - sl - 1, r - sl - 1));
        if (l <= sl && sl < r) res = std::min(res, n->key);
        return res;
    }

    Np merge(Np l, Np r) {
        if (l == NIL) return r;
        if (r == NIL) return l;
        int sl = size(l), sr = size(r);
        if(rand() % (sl + sr) < sl){
            l->right = merge(l->right, r);
            update(l);
            return l;
        } else {
            r->left = merge(l, r->left);
            update(r);
            return r;
        }
    }

    pair split(Np n, int k) {
        if (n == NIL) return{ NIL, NIL };
        if (k <= size(n->left)) {
            pair p = split(n->left, k);
            n->left = p.second;
            update(n);
            return{ p.first, n };
        } else {
            pair p = split(n->right, k - size(n->left) - 1);
            n->right = p.first;
            update(n);
            return{ n, p.second };
        }
    }

    Np shift(Np n, int l, int r) {
        Np a, b, c, d;
        std::tie(a, b) = split(n, l);
        std::tie(b, c) = split(b, r - l);
        std::tie(c, d) = split(c, 1);
        return merge(merge(a, c), merge(b, d));
    }

    Np append(Np n, const Key &k) {
        static Node pool[200010];
        static int p = 0;
        Np a = pool + p++;
        *a = { k, NIL, NIL, 1, k };
        return merge(n, a);
    }
};

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

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

    RBST::Node *root = RBST::NIL;

    for (int i = 0; i < n; i++) {
        int a;
        cin >> a;
        root = RBST::append(root, a);
    }

    //Treap::show(root);

    for (int i = 0; i < q; i++) {
        int x, y, z;
        cin >> x >> y >> z;
        if (x == 0) {
            root = RBST::shift(root, y, z);
        }
        if (x == 1) {
            //puts("=====");
            //Treap::show(root);
            cout << RBST::min(root, y, z + 1) << '\n';
        }
        if (x == 2) {
            RBST::assign(root, y, z);
        }
    }
}

Compiler output:
a.cc:52:14: error: duplicate 'const'
   52 |     const Np const NIL = new Node{ Key(), nullptr, nullptr, 0, INF };
      |              ^~~~~
      |              -----