oj.uz

Submission #417180

# Submission time Handle Problem Language Result Execution time Memory
417180 2021-06-03T12:39:57 Z pavement Event Hopping 2 (JOI21_event2) C++17
1 / 100
 591 ms 90540 KB 
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;
#ifdef _WIN32
#define getchar_unlocked _getchar_nolock
#endif
#define int long long
#define mp make_pair
#define mt make_tuple
#define pb push_back
#define ppb pop_back
#define eb emplace_back
#define g0(a) get<0>(a)
#define g1(a) get<1>(a)
#define g2(a) get<2>(a)
#define g3(a) get<3>(a)
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
typedef double db;
typedef long long ll;
typedef long double ld;
typedef pair<int, int> ii;
typedef tuple<int, int, int> iii;
typedef tuple<int, int, int, int> iiii;
typedef tree<iii, null_type, greater<iii>, rb_tree_tag, tree_order_statistics_node_update> ordered_set;

int N, K, L[500005], R[500005], A[500005], ft2[500005], ft3[500005];
bool rec;
vector<int> ans, v;
set<ii> cfm;
multiset<ii> ft[500005];
set<iii> S;
vector<iii> tmp;

bool intersect(int a, int b, int c, int d) {
	if (a > c) swap(a, c), swap(b, d);
	return b > c;
}

inline int ls(int x) { return x & -x; }

ii qry(int p) {
	ii ret = mp(LLONG_MAX, LLONG_MAX);
	for (; p <= 2 * N; p += ls(p))
		if (!ft[p].empty()) ret = min(ret, *ft[p].begin());
	return ret;
}

void potadd(int x) {
	for (int p = L[x]; p; p -= ls(p))
		ft[p].emplace(R[x], x);
}

void potdel(int x) {
	for (int p = L[x]; p; p -= ls(p)) {
		assert(ft[p].find(mp(R[x], x)) != ft[p].end());
		ft[p].erase(ft[p].find(mp(R[x], x)));
	}
}

int ft2_qry(int p) {
	int r = 0;
	for (; p; p -= ls(p)) r += ft2[p];
	return r;
}

void ft2_upd(int p, int v) {
	for (; p <= 2 * N; p += ls(p)) ft2[p] += v;
}

int ft3_qry(int p) {
	p = 2 * N - p + 1;
	int r = 0;
	for (; p; p -= ls(p)) r += ft3[p];
	return r;
}

void ft3_upd(int p, int v) {
	p = 2 * N - p + 1;
	for (; p <= 2 * N; p += ls(p)) ft3[p] += v;
}

void addseg(int x) {
	int lim;
	auto it = S.lower_bound(mt(R[x], 0ll, 0ll));
	if (it == S.end()) lim = LLONG_MAX;
	else lim = g0(*it);
	vector<set<iii>::iterator> todel;
	while (it != S.begin()) {
		--it;
		if (intersect(g0(*it), g1(*it), L[x], R[x])) {
			ft2_upd(g1(*it), -1);
			ft3_upd(g0(*it), -1);
			potadd(g2(*it));
			todel.pb(it);
		} else break;
	}
	for (auto i : todel) S.erase(i);
	ft2_upd(R[x], 1);
	ft3_upd(L[x], 1);
	S.emplace(L[x], R[x], x);
	potdel(x);
	auto tmp = qry(R[x]);
	if (lim == LLONG_MAX) assert(tmp.second == LLONG_MAX);
	if (tmp.second != LLONG_MAX && tmp.first <= lim) {
		assert(!rec);
		rec = 1;
		addseg(tmp.second);
		rec = 0;
	}
}

main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	cin >> N >> K;
	for (int i = 1; i <= N; i++) cin >> L[i] >> R[i], v.pb(L[i]), v.pb(R[i]);
	sort(v.begin(), v.end());
	v.erase(unique(v.begin(), v.end()), v.end());
	for (int i = 1; i <= N; i++) {
		L[i] = lower_bound(v.begin(), v.end(), L[i]) - v.begin() + 1;
		R[i] = lower_bound(v.begin(), v.end(), R[i]) - v.begin() + 1;
		tmp.eb(R[i], L[i], i);
	}
	sort(tmp.begin(), tmp.end());
	int lastr = LLONG_MIN;
	for (int i = 1; i <= N; i++) potadd(i);
	for (auto [r, l, i] : tmp)
		if (lastr <= l) {
			ft2_upd(R[i], 1);
			ft3_upd(L[i], 1);
			S.emplace(l, r, i);
			potdel(i);
			lastr = r;
		}
	int top = S.size();
	if (S.size() < K) return cout << "-1\n", 0;
	for (int i = 1; i <= N; i++) {
		auto it = cfm.lower_bound(mp(R[i], 0ll));
		bool yep = 1;
		if (it != cfm.begin()) {
			--it;
			if (intersect(it->first, it->second, L[i], R[i])) yep = 0;
		}
		if (!yep) continue;
		A[i] = ft2_qry(L[i]) + ft3_qry(R[i]) + 1;
		auto tmp = qry(R[i]);
		auto it2 = S.lower_bound(mt(R[i], 0ll, 0ll));
		if (it2 == S.end()) assert(tmp.second == LLONG_MAX);
		if (tmp.second != LLONG_MAX && (it2 == S.end() || tmp.first <= g0(*it2))) A[i]++;
		assert(A[i] <= top);
		if (A[i] >= K) {
			cfm.emplace(L[i], R[i]);
			ans.pb(i);
			addseg(i);
		}
	}
	assert(ans.size() >= K);
	for (int i = 0; i < K; i++) cout << ans[i] << '\n';
}

Compilation message

event2.cpp:114:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
  114 | main() {
      | ^~~~
event2.cpp: In function 'int main()':
event2.cpp:138:15: warning: comparison of integer expressions of different signedness: 'std::set<std::tuple<long long int, long long int, long long int> >::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
  138 |  if (S.size() < K) return cout << "-1\n", 0;
      |      ~~~~~~~~~^~~
In file included from /usr/include/c++/10/ext/pb_ds/detail/pat_trie_/pat_trie_.hpp:45,
                 from /usr/include/c++/10/ext/pb_ds/detail/container_base_dispatch.hpp:90,
                 from /usr/include/c++/10/ext/pb_ds/assoc_container.hpp:48,
                 from event2.cpp:2:
event2.cpp:159:20: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
  159 |  assert(ans.size() >= K);
      |         ~~~~~~~~~~~^~~~

Subtask #1
0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 23864 KB Output is correct
2 Correct 16 ms 23848 KB Output is correct
3 Correct 15 ms 23828 KB Output is correct
4 Correct 581 ms 89048 KB Output is correct
5 Correct 577 ms 89072 KB Output is correct
6 Correct 591 ms 90044 KB Output is correct
7 Correct 576 ms 89664 KB Output is correct
8 Correct 572 ms 88704 KB Output is correct
9 Correct 588 ms 90540 KB Output is correct
10 Correct 576 ms 89804 KB Output is correct
11 Correct 574 ms 89696 KB Output is correct
12 Incorrect 555 ms 88704 KB Output isn't correct
13 Halted 0 ms 0 KB -

Subtask #2
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 23756 KB Output is correct
2 Correct 18 ms 23740 KB Output is correct
3 Correct 15 ms 23792 KB Output is correct
4 Correct 15 ms 23844 KB Output is correct
5 Correct 16 ms 23784 KB Output is correct
6 Correct 17 ms 23728 KB Output is correct
7 Correct 16 ms 23824 KB Output is correct
8 Correct 16 ms 23848 KB Output is correct
9 Correct 16 ms 23756 KB Output is correct
10 Correct 16 ms 23756 KB Output is correct
11 Correct 16 ms 23796 KB Output is correct
12 Correct 16 ms 23756 KB Output is correct
13 Correct 16 ms 23756 KB Output is correct
14 Correct 15 ms 23844 KB Output is correct
15 Correct 16 ms 23812 KB Output is correct
16 Correct 16 ms 23800 KB Output is correct
17 Correct 15 ms 23744 KB Output is correct
18 Correct 17 ms 23752 KB Output is correct
19 Correct 15 ms 23756 KB Output is correct
20 Correct 15 ms 23768 KB Output is correct
21 Correct 16 ms 23840 KB Output is correct
22 Correct 15 ms 23756 KB Output is correct
23 Correct 16 ms 23736 KB Output is correct
24 Correct 15 ms 23828 KB Output is correct
25 Correct 16 ms 23756 KB Output is correct
26 Correct 16 ms 23796 KB Output is correct
27 Correct 16 ms 23756 KB Output is correct

Subtask #3
0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 23756 KB Output is correct
2 Correct 18 ms 23740 KB Output is correct
3 Correct 15 ms 23792 KB Output is correct
4 Correct 15 ms 23844 KB Output is correct
5 Correct 16 ms 23784 KB Output is correct
6 Correct 17 ms 23728 KB Output is correct
7 Correct 16 ms 23824 KB Output is correct
8 Correct 16 ms 23848 KB Output is correct
9 Correct 16 ms 23756 KB Output is correct
10 Correct 16 ms 23756 KB Output is correct
11 Correct 16 ms 23796 KB Output is correct
12 Correct 16 ms 23756 KB Output is correct
13 Correct 16 ms 23756 KB Output is correct
14 Correct 15 ms 23844 KB Output is correct
15 Correct 16 ms 23812 KB Output is correct
16 Correct 16 ms 23800 KB Output is correct
17 Correct 15 ms 23744 KB Output is correct
18 Correct 17 ms 23752 KB Output is correct
19 Correct 15 ms 23756 KB Output is correct
20 Correct 15 ms 23768 KB Output is correct
21 Correct 16 ms 23840 KB Output is correct
22 Correct 15 ms 23756 KB Output is correct
23 Correct 16 ms 23736 KB Output is correct
24 Correct 15 ms 23828 KB Output is correct
25 Correct 16 ms 23756 KB Output is correct
26 Correct 16 ms 23796 KB Output is correct
27 Correct 16 ms 23756 KB Output is correct
28 Runtime error 43 ms 50924 KB Execution killed with signal 6
29 Halted 0 ms 0 KB -

Subtask #4
0 / 61.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 23864 KB Output is correct
2 Correct 16 ms 23848 KB Output is correct
3 Correct 15 ms 23828 KB Output is correct
4 Correct 581 ms 89048 KB Output is correct
5 Correct 577 ms 89072 KB Output is correct
6 Correct 591 ms 90044 KB Output is correct
7 Correct 576 ms 89664 KB Output is correct
8 Correct 572 ms 88704 KB Output is correct
9 Correct 588 ms 90540 KB Output is correct
10 Correct 576 ms 89804 KB Output is correct
11 Correct 574 ms 89696 KB Output is correct
12 Incorrect 555 ms 88704 KB Output isn't correct
13 Halted 0 ms 0 KB -