#include using namespace std; using ll = long long; using ull = unsigned long long; mt19937 mt(736); template class treap { struct node { using nodeptr = unique_ptr; T x; const unsigned y; nodeptr l, r; size_t sz; explicit node(T x = T{}) : x(x), y(mt()), l(nullptr), r(nullptr), sz(1) {} }; using nodeptr = typename node::nodeptr; static nodeptr make_node(T x) { return make_unique(x); } static auto size(const nodeptr &h) { return h == nullptr ? 0 : h->sz; } static void upd(const nodeptr &h) { if (h != nullptr) h->sz = size(h->l) + 1 + size(h->r); } static nodeptr merge(nodeptr &&le, nodeptr &&ri) { if (le == nullptr) return std::move(ri); if (ri == nullptr) return std::move(le); if (le->y < ri->y) { auto rch = merge(std::move(le->r), std::move(ri)); le->r = std::move(rch); upd(le); return std::move(le); } else { auto lch = merge(std::move(le), std::move(ri->l)); ri->l = std::move(lch); upd(ri); return std::move(ri); } } static pair split(nodeptr &&h, auto &&fn) // C++20 { if (h == nullptr) return {nullptr, nullptr}; if (fn(h)) { auto [le, ri] = split(std::move(h->r), std::forward(fn)); // structured binding, C++17 h->r = std::move(le); upd(h); return {std::move(h), std::move(ri)}; } else { auto [le, ri] = split(std::move(h->l), std::forward(fn)); h->l = std::move(ri); upd(h); return {std::move(le), std::move(h)}; } } static auto split_by_key(nodeptr &&h, const T &x) { return split(std::move(h), [&x](const nodeptr &h) { return h->x < x; }); } static auto split_by_size(nodeptr &&h, size_t k) { return split(std::move(h), [&k](const nodeptr &h) { if (auto ind = size(h->l); ind < k) { k -= ind + 1; return true; } else return false; }); } nodeptr root = nullptr; template static nodeptr build(It be, It en) // naive: O(n log), true: O(n) { if (be == en) return nullptr; if (distance(be, en) == 1) return make_node(*be); auto t = be + distance(be, en) / 2; return merge(build(be, t), build(t, en)); } static void output(const nodeptr &h, auto it) { if (h == nullptr) return; output(h->l, it); *(it++) = h->x; output(h->r, it); } public: treap() = default; template treap(It be, It en) : root(build(be, en)) {} void rotate(size_t l, size_t m, size_t r) { auto [mi, ri] = split_by_size(std::move(root), r); auto [tmp, mi_r] = split_by_size(std::move(mi), m); auto [le, mi_l] = split_by_size(std::move(tmp), l); root = merge(merge(std::move(le), std::move(mi_r)), merge(std::move(mi_l), std::move(ri))); } void output(auto it) { output(root, it); } [[nodiscard]] auto size() const { return size(root); } T &operator[](size_t k) { auto [le, tmp] = split_by_size(std::move(root), k); auto [mi, ri] = split_by_size(std::move(tmp), 1); assert(mi != nullptr); auto &ans = mi->x; root = merge(std::move(le), merge(std::move(mi), std::move(ri))); return ans; } }; void solve(istream &cin = std::cin, ostream &cout = std::cout) { int n, q; cin >> n >> q; vector ord(n); iota(ord.begin(), ord.end(), 1); treap tr(ord.begin(), ord.end()); for (int i = 0; i < q; i++) { int l, r; cin >> l >> r; l--; tr.rotate(0, l, r); } tr.output(ostream_iterator(cout, " ")); cout << endl; } void stress(istream &cin = std::cin, ostream &cout = std::cout) { int n, q; cin >> n >> q; vector ord(n); iota(ord.begin(), ord.end(), 1); for (int i = 0; i < q; i++) { int l, r; cin >> l >> r; l--; rotate(ord.begin(), ord.begin() + l, ord.begin() + r); } ranges::copy(ord, ostream_iterator(cout, " ")); cout << endl; } void gen(ostream &cout = std::cout) { const int n = 20, q = 10; cout << n << ' ' << q << endl; uniform_int_distribution uid(1, n); for (int i = 0; i < q; i++) { int l = uid(mt), r = uid(mt); if (r < l) swap(l, r); cout << l << ' ' << r << endl; } } int main() { ios_base::sync_with_stdio(false); cin.tie(nullptr); cout << fixed; #ifdef LOCAL auto st = chrono::steady_clock::now(); ifstream fin("../input.txt"); do { solve(fin); cout << "===" << endl; string str; while (getline(fin, str) && str != string(max(1, (int) str.size()), '=')); } while (fin); #ifdef STRESS for (int cnt = 1;; cnt++) { stringstream ss, in1, out1, in2, out2; gen(ss); in1 << ss.str(); in2 << ss.str(); solve(in1, out1); stress(in2, out2); if (out1.str() != out2.str()) { cout << "fail: " << cnt << endl; cout << ss.str(); cout << "solve:" << endl; cout << out1.str(); cout << "stress:" << endl; cout << out2.str(); break; } else if (cnt % 100 == 0) cout << "ok: " << cnt << endl; } #endif cout << setprecision((int) floor(log10(chrono::steady_clock::duration::period::den))); cout << "clock: " << chrono::duration(chrono::steady_clock::now() - st).count() << endl; #else stress(); #endif return 0; }