#include using namespace std; // https://yukicoder.me/problems/no/2292 /* n个顶点无向图,初始没有边,按顺序执行q次操作, + 1 l r : 对 l <= u < v <= r 的所有顶点对(u,v)连边 + 2 l r : 删除所有 1 <= u < r, l < v <= n 的 (u,v)对之间的边 + 3 u v : 判断u,v是否连通,连通输出1,否则输出0 + 4 v: 输出顶点v所在连通分量的顶点数目 */ template // 懒标记的默认值, 用于清空父节点的懒标记 struct LazySegTree { int n, size, log; vector d; vector lz; void pull(int k) { d[k] = op(d[2 * k], d[2 * k + 1]); } void push_down(int k, F f) { d[k] = tag(f, d[k]); if (k < size) lz[k] = merge(f, lz[k]); } void push(int k) { push_down(2 * k, lz[k]), push_down(2 * k + 1, lz[k]); lz[k] = id(); } LazySegTree() : LazySegTree(0) {} explicit LazySegTree(int N) : LazySegTree(vector(N, e())) {} explicit LazySegTree(const vector& v) : n(int(v.size())) { log = ceil_lg(n), size = 1 << log; d = vector(2 * size, e()), lz = vector(size, id()); for (int i = 0; i < n; i++) d[size + i] = v[i]; for (int i = size - 1; i >= 1; i--) pull(i); } int ceil_lg(int x) { // minimum non-neg x s.t. `n <= 2^x` return x <= 1 ? 0 : 32 - __builtin_clz(x - 1); } void set(int p, S x) { // 0 <= p < n p += size; for (int i = log; i >= 1; i--) push(p >> i); d[p] = x; for (int i = 1; i <= log; i++) pull(p >> i); } S get(int p) { // Assert 0 <= p < n p += size; for (int i = log; i >= 1; i--) push(p >> i); return d[p]; } S get(int l, int r) { // op(a[l], ..., a[r - 1]) if (l == r) return e(); l += size, r += size; for (int i = log; i >= 1; i--) { if (((l >> i) << i) != l) push(l >> i); if (((r >> i) << i) != r) push((r - 1) >> i); } S sl = e(), sr = e(); while (l < r) { if (l & 1) sl = op(sl, d[l++]); if (r & 1) sr = op(d[--r], sr); l >>= 1, r >>= 1; } return op(sl, sr); } S get_all() { return d[1]; } void apply(int p, F f) { // 0 <= p < n p += size; for (int i = log; i >= 1; i--) push(p >> i); d[p] = tag(f, d[p]); for (int i = 1; i <= log; i++) pull(p >> i); } void apply(int l, int r, F f) { // a[i] = f(a[i]), [l, r) if (l == r) return; l += size, r += size; for (int i = log; i >= 1; i--) { if (((l >> i) << i) != l) push(l >> i); if (((r >> i) << i) != r) push((r - 1) >> i); } int l2 = l, r2 = r; while (l < r) { if (l & 1) push_down(l++, f); if (r & 1) push_down(--r, f); l >>= 1, r >>= 1; } l = l2, r = r2; for (int i = 1; i <= log; i++) { if (((l >> i) << i) != l) pull(l >> i); if (((r >> i) << i) != r) pull((r - 1) >> i); } } template int max_right(int l) { return max_right(l, [](S x) { return g(x); }); } template int max_right(int l, G g) { // 0 <= l <= n, g(e()) is true if (l == n) return n; l += size; for (int i = log; i >= 1; i--) push(l >> i); S sm = e(); do { while (l % 2 == 0) l >>= 1; if (!g(op(sm, d[l]))) { while (l < size) { push(l); l = (2 * l); if (g(op(sm, d[l]))) sm = op(sm, d[l]), l++; } return l - size; } sm = op(sm, d[l]); l++; } while ((l & -l) != l); return n; } template int min_left(int r) { return min_left(r, [](S x) { return g(x); }); } template int min_left(int r, G g) { // 0 <= r <= n, g(e()) is true if (r == 0) return 0; r += size; for (int i = log; i >= 1; i--) push((r - 1) >> i); S sm = e(); do { r--; while (r > 1 && (r % 2)) r >>= 1; if (!g(op(d[r], sm))) { while (r < size) { push(r); r = (2 * r + 1); if (g(op(d[r], sm))) sm = op(d[r], sm), r--; } return r + 1 - size; } sm = op(d[r], sm); } while ((r & -r) != r); return 0; } }; using S = pair; //(size, active sum) using F = pair; //(update, 01) S op(S x, S y){ return S{x.first + y.first, x.second + y.second}; } S e() { return S{}; }; S tag(F f, S s) { if (f.first) return {s.first, f.second ? s.first : 0}; return s; } F merge(F x, F y) { return x.first ? x : y; } F id() { return F{false, false}; } using ll = long long; int main() { ios::sync_with_stdio(false); cin.tie(nullptr); int n, q; cin >> n >> q; vector> querys; int t, x, y; vector xs{1, 2, n - 1, n, n + 1}; for (int i = 0; i < q; ++i) { cin >> t; if (t == 4) { cin >> x; querys.emplace_back(t, x, -1); xs.emplace_back(x - 1); xs.emplace_back(x); xs.emplace_back(x + 1); } else { cin >> x >> y; querys.emplace_back(t, x, y); xs.emplace_back(x - 1); xs.emplace_back(x); xs.emplace_back(x + 1); xs.emplace_back(t - 1); xs.emplace_back(y); xs.emplace_back(y + 1); } } sort(xs.begin(), xs.end()); xs.erase(unique(xs.begin(), xs.end()), xs.end()); vector init; for (int i = 1; i < xs.size(); ++i) { init.emplace_back(S{xs[i] - xs[i - 1], 0}); } LazySegTree seg(init); for (auto &[t, x, y] : querys) { if (t == 1) { x = lower_bound(xs.begin(), xs.end(), x) - xs.begin(); y = lower_bound(xs.begin(), xs.end(), y) - xs.begin(); seg.apply(x, y, {true, true}); } else if (t == 2) { x = lower_bound(xs.begin(), xs.end(), x) - xs.begin(); y = lower_bound(xs.begin(), xs.end(), y) - xs.begin(); seg.apply(x, y, {true, false}); } else if (t == 3) { x = lower_bound(xs.begin(), xs.end(), x) - xs.begin(); y = lower_bound(xs.begin(), xs.end(), y) - xs.begin(); if (x > y) swap(x, y); auto [f, s] = seg.get(x, y); cout << (f == s) << '\n'; } else { int p = lower_bound(xs.begin(), xs.end(), x) - xs.begin(); int l = seg.min_left(p, [&](S x){return x.first == x.second;}); int r = seg.max_right(p, [&](S x){return x.first == x.second;}); cout << seg.get(l, r).first + 1 << '\n'; } } return 0; }