Submission #572598

#	Time	Username	Problem	Language	Result	Execution time	Memory
572598		vovamr	Segments (IZhO18_segments)	C++17	100 / 100	4408 ms	22356 KiB

segments

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define fi first
#define se second
#define ll long long
#define ld long double
#define sz(x) ((int)(x).size())
#define all(x) 	(x).begin(), (x).end()
#define pb push_back
#define mpp make_pair
#define ve vector
using namespace std;
using namespace __gnu_pbds;
template<class T> using oset = tree<T,null_type,less_equal<T>,rb_tree_tag,tree_order_statistics_node_update>;
const ll inf = 1e18; const int iinf = 1e9;
typedef pair<ll, ll> pll;
typedef pair<int, int> pii;
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
template <typename T> inline bool chmin(T& a, T b) { return (a > b ? a = b, 1 : 0); }
template <typename T> inline bool chmax(T& a, T b) { return (a < b ? a = b, 1 : 0); }

constexpr int N = 2e5 + 100;
constexpr int b = 2500;

int n;
pii segs[N];
ve<int> s[N / b], st[N / b];
inline void reset(const set<pii> &bodek) {
	for (int i = 0; i <= (n - 1) / b; ++i) s[i].clear(), st[i].clear();
	n = sz(bodek); int ptr = 0;
	for (auto &[r, l] : bodek) segs[ptr++] = {r, l};
	for (int i = 0; i < n; ++i) { auto &[r, l] = segs[i]; s[i / b].pb(l), st[i / b].pb(-(r - l + 1)); }
	for (int i = 0; i <= (n - 1) / b; ++i) sort(all(s[i])), sort(all(st[i]));
}
inline int cnts(int id, int x) { return upper_bound(all(s[id]), x) - s[id].begin(); }
inline int cnts1(int id, int x) { return upper_bound(all(st[id]), x) - st[id].begin(); }
inline int get1(int pos, int x) {
	int ans = 0;
	pos = lower_bound(segs, segs + n, mpp(pos, -1)) - segs;
	if (pos == n) return 0;
	int bl = pos / b;
	for (int i = bl + 1; i <= (n - 1) / b; ++i) ans += cnts(i, x);
	for (int i = pos; i < min(n, (bl + 1) * b); ++i) ans += segs[i].se <= x;
	return ans;
}
inline int get2(int l, int r, int x) {
	l = lower_bound(segs, segs + n, mpp(l, -1)) - segs;
	r = upper_bound(segs, segs + n, mpp(r, INT_MAX)) - segs - 1;
	if (l > r) return 0;
	int lb = l / b, rb = r / b;
	if (lb == rb) {
		int ans = 0;
		for (int i = l; i <= r; ++i) {
			ans += (segs[i].fi - segs[i].se + 1 >= x);
		} return ans;
	}
	int ans = 0;
	for (int i = lb + 1; i <= rb - 1; ++i) ans += cnts1(i, -x);
	for (int i = l; i < (lb + 1) * b; ++i) ans += (segs[i].fi - segs[i].se + 1 >= x);
	for (int i = r; i >= rb * b; --i) ans += (segs[i].fi - segs[i].se + 1 >= x);
	return ans;
}
inline int answer(int l, int r, int k) {
	if (r - l + 1 < k) return 0;
	int ans = 0;
	ans += get1(r + 1, r - k + 1);
	ans += get2(l + k - 1, r, k);
	return ans;
}

inline int isec(int l, int r, int l1, int r1) {
	return max(0, min(r, r1) - max(l, l1) + 1);
}

inline void solve() {
	int q, t;
	cin >> q >> t;

	int ID = 0;
	ve<int> tr(q);
	ve<array<int,4>> que(q);
	for (int i = 0; i < q; ++i) {
		int e;
		cin >> e;
		que[i][0] = e;
		if (e == 1) cin >> que[i][1] >> que[i][2], tr[ID++] = i;
		else if (e == 2) cin >> que[i][1], --que[i][1];
		else cin >> que[i][1] >> que[i][2] >> que[i][3];
	}

	int last = 0;
	ve<int> del(q), gdel(q);
	for (int l = 0; l < q; l += b) {
		set<pii> sgs;
		int r = min(q - 1, l + b - 1);

		fill(all(del), 0);
		for (int i = 0; i <= r; ++i) if (que[i][0] == 2) del[tr[que[i][1]]] = 1;
		for (int i = 0; i < l; ++i) if (que[i][0] == 1) {
			if (!del[i]) {
				auto &[_, l, r, __] = que[i];
				sgs.insert({r, l});
			}
		}

		reset(sgs);
		for (int i = l; i <= r; ++i) {
			auto &[e, le, re, k] = que[i];
			if (e == 1 || e == 3) {
				le ^= (t * last), re ^= (t * last);
				if (le > re) swap(le, re);
			}

			if (e == 3) {
				int ans = answer(le, re, k);
				for (int j = l; j <= r; ++j) {
					auto &[E, L, R, K] = que[j];
					if (E == 1 && !del[j] && j < i) ans += isec(le, re, L, R) >= k;
					else if (E == 2) { int J = tr[L];
						if (J < i && !gdel[J]) ans += isec(le, re, que[J][1], que[J][2]) >= k;
					}
				}
				cout << (last = ans) << '\n';
//				debug();
			}
			else if (e == 2) gdel[tr[le]] = 1;
		}
	}
}

signed main() {
	ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
	int q = 1; // cin >> q;
	while (q--) solve();
	cerr << fixed << setprecision(3) << "Time execution: " << (double)clock() / CLOCKS_PER_SEC << endl;
}

• Subtask 1: 7 / 7
• Subtask 2: 15 / 15
• Subtask 3: 16 / 16
• Subtask 4: 17 / 17
• Subtask 5: 20 / 20
• Subtask 6: 25 / 25