Submission #882537

#	Time	Username	Problem	Language	Result	Execution time	Memory
882537		marvinthang	Sweeping (JOI20_sweeping)	C++17	10 / 100	3724 ms	181868 KiB

sweeping

/*************************************
*    author: marvinthang             *
*    created: 03.12.2023 16:52:48    *
*************************************/

#include <bits/stdc++.h>

using namespace std;

#define                  fi  first
#define                  se  second
#define                left  ___left
#define               right  ___right
#define                TIME  (1.0 * clock() / CLOCKS_PER_SEC)
#define             MASK(i)  (1LL << (i))
#define           BIT(x, i)  ((x) >> (i) & 1)
#define  __builtin_popcount  __builtin_popcountll
#define              ALL(v)  (v).begin(), (v).end()
#define           REP(i, n)  for (int i = 0, _n = (n); i < _n; ++i)
#define          REPD(i, n)  for (int i = (n); i-- > 0; )
#define        FOR(i, a, b)  for (int i = (a), _b = (b); i < _b; ++i) 
#define       FORD(i, b, a)  for (int i = (b), _a = (a); --i >= _a; ) 
#define       FORE(i, a, b)  for (int i = (a), _b = (b); i <= _b; ++i) 
#define      FORDE(i, b, a)  for (int i = (b), _a = (a); i >= _a; --i) 
#define        scan_op(...)  istream & operator >> (istream &in, __VA_ARGS__ &u)
#define       print_op(...)  ostream & operator << (ostream &out, const __VA_ARGS__ &u)
#ifdef LOCAL
    #include "debug.h"
#else
    #define file(name) if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
    #define DB(...) 23
    #define db(...) 23
    #define debug(...) 23
#endif

template <class U, class V> scan_op(pair <U, V>)  { return in >> u.first >> u.second; }
template <class T> scan_op(vector <T>)  { for (size_t i = 0; i < u.size(); ++i) in >> u[i]; return in; }
template <class U, class V> print_op(pair <U, V>)  { return out << '(' << u.first << ", " << u.second << ')'; }
template <size_t i, class T> ostream & print_tuple_utils(ostream &out, const T &tup) { if constexpr(i == tuple_size<T>::value) return out << ")";  else return print_tuple_utils<i + 1, T>(out << (i ? ", " : "(") << get<i>(tup), tup); }
template <class ...U> print_op(tuple<U...>) { return print_tuple_utils<0, tuple<U...>>(out, u); }
template <class Con, class = decltype(begin(declval<Con>()))> typename enable_if <!is_same<Con, string>::value, ostream&>::type operator << (ostream &out, const Con &con) { out << '{'; for (__typeof(con.begin()) it = con.begin(); it != con.end(); ++it) out << (it == con.begin() ? "" : ", ") << *it; return out << '}'; }

// end of template

void process(void) {
	int n, m, q; cin >> n >> m >> q;
	vector <array <int, 3>> events;
	REP(i, m) {
		int x, y; cin >> x >> y;
		events.push_back(array{i, x, y});
	}
	int cnt = 0;
	REP(i, q) {
		int t; cin >> t;
		if (t == 1) {
			int a; cin >> a;
			events.push_back(array{-t, a - 1, cnt++});
		} else if (t < 4) {
			int l; cin >> l;
			events.push_back(array{-t, l, 0});
		} else {
			int x, y; cin >> x >> y;
			events.emplace_back(array{m++, x, y});
		}
	}
	vector <pair <int, int>> res(cnt);
	vector <int> pos(m);
	vector <int> lab_x(m), lab_y(m), val_x(m), val_y(m);
	vector <vector <int>> comps_x(m), comps_y(m);
	function<void(int, int, const vector <array <int, 3>> &)> solve = [&] (int l, int r, const vector <array <int, 3>> &events) {
		if (events.empty() || l > r) return;
		// cout << l << ' ' << r << '\n';
		int mid = l + r >> 1;
		int px = mid, py = n - mid;
		vector <array <int, 3>> left, right;
		priority_queue <pair <int, int>, vector <pair <int, int>>, greater <pair <int, int>>> pq_x, pq_y;
		for (auto e: events) {
			if (e[0] == -1) {
				int a = e[1];
				if (pos[a]) (pos[a] == -1 ? left : right).push_back(e);
				else res[e[2]] = pair{val_x[lab_x[a]], val_y[lab_y[a]]};
			} else if (e[0] == -2) {
				int l = e[1];
				if (l < py) {
					right.push_back(e);
					while (!pq_y.empty() && pq_y.top().fi <= l) {
						int u = pq_y.top().se; pq_y.pop();
						for (int v: comps_y[u]) if (!pos[v]) {
							pos[v] = 1;
							right.push_back(array{v, n - l, val_y[u]});
						}
					}
				} else {
					if (l > py) left.push_back(e);
					int cur = -1;
					while (!pq_x.empty() && pq_x.top().fi <= n - l) {
						int u = pq_x.top().se; pq_x.pop();
						if (cur == -1) cur = u;
						else {
							if (comps_x[cur].size() < comps_x[u].size()) swap(cur, u);
							for (int v: comps_x[u]) if (!pos[v]) {
								lab_x[v] = cur;
								comps_x[cur].push_back(v);
							}
							comps_x[u].clear();
						}
					}
					if (cur != -1) {
						val_x[cur] = n - l;
						pq_x.emplace(n - l, cur);
					}
				}
			} else if (e[0] == -3) {
				int l = e[1];
				// cout << l << ' ' << py << '\n';
				if (l < px) {
					if (l > px) left.push_back(e);
					while (!pq_x.empty() && pq_x.top().fi <= l) {
						int u = pq_x.top().se; pq_x.pop();
						for (int v: comps_x[u]) if (!pos[v]) {
							pos[v] = -1;
							right.push_back(array{v, val_x[u], n - l});
						}
					}
				} else {
					right.push_back(e);
					int cur = -1;
					while (!pq_y.empty() && pq_y.top().fi <= n - l) {
						int u = pq_y.top().se; pq_y.pop();
						if (cur == -1) cur = u;
						else {
							if (comps_y[cur].size() < comps_y[u].size()) swap(cur, u);
							for (int v: comps_y[u]) if (!pos[v]) {
								lab_y[v] = cur;
								comps_y[cur].push_back(v);
							}
							comps_y[u].clear();
						}
					}
					if (cur != -1) {
						val_y[cur] = n - l;
						pq_y.emplace(n - l, cur);
					}
				}
			} else {
				int u = e[0], x = e[1], y = e[2];
				if (x > px) {
					pos[u] = 1;
					right.push_back(e);
				} else if (y > py) {
					pos[u] = -1;
					left.push_back(e);
				} else {
					pos[u] = 0;

					comps_x[u] = vector {u};
					lab_x[u] = u;
					val_x[u] = x;
					pq_x.emplace(x, u);

					comps_y[u] = vector {u};
					lab_y[u] = u;
					val_y[u] = y;
					pq_y.emplace(y, u);
				}
			}
		}
		// if (l >= 4) cout << events << '\n';
		// cout << "-----------\n";
		solve(l, mid - 1, left);
		solve(mid + 1, r, right);
	};
	solve(0, n, events);
	REP(i, cnt) cout << res[i].fi << ' ' << res[i].se << '\n';
}

int main(void) {
	ios_base::sync_with_stdio(false); cin.tie(nullptr); // cout.tie(nullptr);
	file("JOI20_sweeping");
	// int t; cin >> t; while (t--)
	process();
	// cerr << "Time elapsed: " << TIME << " s.\n";
	return (0^0);
}

Compilation message (stderr)

sweeping.cpp: In lambda function:
sweeping.cpp:73:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   73 |   int mid = l + r >> 1;
      |             ~~^~~
sweeping.cpp: In function 'int main()':
sweeping.cpp:30:61: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   30 |     #define file(name) if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
      |                                                      ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
sweeping.cpp:179:2: note: in expansion of macro 'file'
  179 |  file("JOI20_sweeping");
      |  ^~~~
sweeping.cpp:30:94: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   30 |     #define file(name) if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
      |                                                                                       ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
sweeping.cpp:179:2: note: in expansion of macro 'file'
  179 |  file("JOI20_sweeping");
      |  ^~~~

• Subtask 1: 0 / 1
• Subtask 2: 10 / 10
• Subtask 3: 0 / 11
• Subtask 4: 0 / 53
• Subtask 5: 0 / 25