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답안 #417103

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
417103 2021-06-03T11:46:13 Z pavement Event Hopping 2 (JOI21_event2) C++17
1 / 100
 242 ms 66228 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];
vector<int> ans, v;
set<ii> cfm, 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))
		ft[p].erase(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 (1) {
		if (it == S.begin()) break;
		--it;
		if (intersect(g0(*it), g1(*it), L[x], R[x])) {
			ft2_upd(g1(*it), -1);
			ft3_upd(g0(*it), -1);
			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);
	auto tmp = qry(R[x]);
	if (tmp.second != LLONG_MAX && tmp.first <= lim) {
		potdel(tmp.second);
		addseg(tmp.second);
	}
}

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 (auto [r, l, i] : tmp) {
		if (lastr <= l) {
			addseg(i);
			lastr = r;
		} else potadd(i);
	}
	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 (tmp.second != LLONG_MAX && tmp.first <= g0(*it2)) A[i]++;
		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:107:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
  107 | main() {
      | ^~~~
event2.cpp: In function 'int main()':
event2.cpp:127:15: 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]
  127 |  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:146:20: 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]
  146 |  assert(ans.size() >= K);
      |         ~~~~~~~~~~~^~~~

Subtask #1
0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 12 ms 23800 KB Output is correct
2 Correct 13 ms 23756 KB Output is correct
3 Correct 13 ms 23756 KB Output is correct
4 Correct 220 ms 49844 KB Output is correct
5 Correct 214 ms 50304 KB Output is correct
6 Correct 221 ms 51896 KB Output is correct
7 Correct 220 ms 51796 KB Output is correct
8 Correct 227 ms 51928 KB Output is correct
9 Correct 215 ms 51760 KB Output is correct
10 Correct 215 ms 51768 KB Output is correct
11 Correct 217 ms 51704 KB Output is correct
12 Incorrect 242 ms 66228 KB Output isn't correct
13 Halted 0 ms 0 KB -

Subtask #2
1.0 / 1.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 23744 KB Output is correct
2 Correct 15 ms 23756 KB Output is correct
3 Correct 14 ms 23736 KB Output is correct
4 Correct 14 ms 23756 KB Output is correct
5 Correct 13 ms 23756 KB Output is correct
6 Correct 13 ms 23736 KB Output is correct
7 Correct 14 ms 23756 KB Output is correct
8 Correct 13 ms 23768 KB Output is correct
9 Correct 13 ms 23756 KB Output is correct
10 Correct 14 ms 23720 KB Output is correct
11 Correct 13 ms 23756 KB Output is correct
12 Correct 13 ms 23736 KB Output is correct
13 Correct 13 ms 23756 KB Output is correct
14 Correct 13 ms 23932 KB Output is correct
15 Correct 13 ms 23836 KB Output is correct
16 Correct 13 ms 23788 KB Output is correct
17 Correct 13 ms 23780 KB Output is correct
18 Correct 13 ms 23752 KB Output is correct
19 Correct 13 ms 23756 KB Output is correct
20 Correct 13 ms 23756 KB Output is correct
21 Correct 13 ms 23756 KB Output is correct
22 Correct 15 ms 23812 KB Output is correct
23 Correct 13 ms 23844 KB Output is correct
24 Correct 13 ms 23884 KB Output is correct
25 Correct 14 ms 23756 KB Output is correct
26 Correct 14 ms 23792 KB Output is correct
27 Correct 14 ms 23756 KB Output is correct

Subtask #3
0 / 31.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 23744 KB Output is correct
2 Correct 15 ms 23756 KB Output is correct
3 Correct 14 ms 23736 KB Output is correct
4 Correct 14 ms 23756 KB Output is correct
5 Correct 13 ms 23756 KB Output is correct
6 Correct 13 ms 23736 KB Output is correct
7 Correct 14 ms 23756 KB Output is correct
8 Correct 13 ms 23768 KB Output is correct
9 Correct 13 ms 23756 KB Output is correct
10 Correct 14 ms 23720 KB Output is correct
11 Correct 13 ms 23756 KB Output is correct
12 Correct 13 ms 23736 KB Output is correct
13 Correct 13 ms 23756 KB Output is correct
14 Correct 13 ms 23932 KB Output is correct
15 Correct 13 ms 23836 KB Output is correct
16 Correct 13 ms 23788 KB Output is correct
17 Correct 13 ms 23780 KB Output is correct
18 Correct 13 ms 23752 KB Output is correct
19 Correct 13 ms 23756 KB Output is correct
20 Correct 13 ms 23756 KB Output is correct
21 Correct 13 ms 23756 KB Output is correct
22 Correct 15 ms 23812 KB Output is correct
23 Correct 13 ms 23844 KB Output is correct
24 Correct 13 ms 23884 KB Output is correct
25 Correct 14 ms 23756 KB Output is correct
26 Correct 14 ms 23792 KB Output is correct
27 Correct 14 ms 23756 KB Output is correct
28 Incorrect 18 ms 25164 KB Output isn't correct
29 Halted 0 ms 0 KB -

Subtask #4
0 / 61.0

# 결과 실행 시간 메모리 Grader output
1 Correct 12 ms 23800 KB Output is correct
2 Correct 13 ms 23756 KB Output is correct
3 Correct 13 ms 23756 KB Output is correct
4 Correct 220 ms 49844 KB Output is correct
5 Correct 214 ms 50304 KB Output is correct
6 Correct 221 ms 51896 KB Output is correct
7 Correct 220 ms 51796 KB Output is correct
8 Correct 227 ms 51928 KB Output is correct
9 Correct 215 ms 51760 KB Output is correct
10 Correct 215 ms 51768 KB Output is correct
11 Correct 217 ms 51704 KB Output is correct
12 Incorrect 242 ms 66228 KB Output isn't correct
13 Halted 0 ms 0 KB -