oj.uz

Submission #49660

# Submission time Handle Problem Language Result Execution time Memory
49660 2018-06-01T18:17:22 Z model_code None (JOI16_worst_reporter2) C++17
100 / 100
 804 ms 77048 KB 
#include <cstdio>
#include <algorithm>
#include <vector>
#include <set>
using namespace std;

const int MAXN = 200200;
const int INF = 1e9;

// range add - range min
struct segtree
{
	static const int DEPTH = 18;
	static const int N = 1 << DEPTH;

	int dsum[2 * N];
	pair<int, int> rmin[2 * N];

	void init()
	{
		fill(dsum, dsum + 2 * N, 0);
		for (int i = 0; i < N; ++i) rmin[i + N] = make_pair(0, i);
		for (int i = N - 1; i >= 1; --i) rmin[i] = min(rmin[2 * i], rmin[2 * i + 1]);
	}
	void add(int p, int qL, int qR, int depth, int v)
	{
		int pL = p << depth, pR = (p + 1) << depth;
		if (qR <= pL || pR <= qL) return;
		if (qL <= pL && pR <= qR) {
			dsum[p] += v;
			rmin[p].first += v;
			return;
		}
		add(p * 2, qL, qR, depth - 1, v);
		add(p * 2 + 1, qL, qR, depth - 1, v);
		rmin[p] = min(rmin[p * 2], rmin[p * 2 + 1]);
		rmin[p].first += dsum[p];
	}
	void add(int qL, int qR, int v)
	{
		add(1, qL + N, qR + N, DEPTH, v);
	}
	pair<int, int> query(int p, int qL, int qR, int depth)
	{
		int pL = p << depth, pR = (p + 1) << depth;
		if (qR <= pL || pR <= qL) return make_pair(INF, INF);
		if (qL <= pL && pR <= qR) return rmin[p];

		dsum[p * 2] += dsum[p];
		rmin[p * 2].first += dsum[p];
		dsum[p * 2 + 1] += dsum[p];
		rmin[p * 2 + 1].first += dsum[p];
		dsum[p] = 0;

		return min(query(p * 2, qL, qR, depth - 1), query(p * 2 + 1, qL, qR, depth - 1));
	}
	pair<int, int> query(int qL, int qR)
	{
		return query(1, qL + N, qR + N, DEPTH);
	}
};

int N, A[MAXN], B[MAXN], C[MAXN], D[MAXN];
set<int> unmet[MAXN];
set<int> unusedA, unusedC;
segtree seg;

long long total_op_size = 0;

void connect(int a, int c)
{
	int ai = lower_bound(D, D + N, B[a]) - D;
	seg.add(ai, c, -1);
	total_op_size += c - ai;
}

void dissolve(int X)
{
	for (;;) {
		auto m = seg.query(0, X);
		if (m.first != 0) break;
		while (unusedC.size() > 0 && *(unusedC.begin()) <= m.second) {
			int a = *(unusedA.begin());
			int c = *(unusedC.begin());

			unusedA.erase(unusedA.begin());
			unusedC.erase(unusedC.begin());
			unmet[A[a]].erase(a);
			connect(a, c);
		}
		seg.add(m.second, m.second + 1, INF);
	}
}

int main()
{
	scanf("%d", &N);
	for (int i = N - 1; i >= 0; --i) scanf("%d%d", A + i, B + i);
	for (int i = N - 1; i >= 0; --i) scanf("%d%d", C + i, D + i);
	seg.init();

	vector<pair<int, int> > eves;
	for (int i = 0; i < N; ++i) {
		eves.push_back({ B[i], i });
		eves.push_back({ D[i], i + N });
	}
	sort(eves.begin(), eves.end());

	int cnt = 0, d_idx = 0;
	int ret = N;
	for (auto p : eves) {
		if (p.second < N) {
			unmet[A[p.second]].insert(p.second);
			unusedA.insert(p.second);
			++cnt;
		} else {
			--cnt;
			p.second -= N;
			seg.add(p.second, p.second + 1, cnt);
			if (unmet[C[p.second]].size() > 0) {
				auto it = unmet[C[p.second]].end();
				--it;
				int a = *it;
				unmet[C[p.second]].erase(it);
				unusedA.erase(a);
				connect(a, p.second);
				--ret;
			} else {
				unusedC.insert(p.second);
			}

			dissolve(++d_idx);
		}
	}

	printf("%d\n", ret);
	return 0;
}

Compilation message

worst_reporter2.cpp: In function 'int main()':
worst_reporter2.cpp:97:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &N);
  ~~~~~^~~~~~~~~~
worst_reporter2.cpp:98:40: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for (int i = N - 1; i >= 0; --i) scanf("%d%d", A + i, B + i);
                                   ~~~~~^~~~~~~~~~~~~~~~~~~~~~
worst_reporter2.cpp:99:40: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for (int i = N - 1; i >= 0; --i) scanf("%d%d", C + i, D + i);
                                   ~~~~~^~~~~~~~~~~~~~~~~~~~~~

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 15864 KB Output is correct
2 Correct 17 ms 16048 KB Output is correct
3 Correct 15 ms 16048 KB Output is correct
4 Correct 15 ms 16080 KB Output is correct
5 Correct 16 ms 16080 KB Output is correct
6 Correct 15 ms 16196 KB Output is correct
7 Correct 16 ms 16196 KB Output is correct
8 Correct 17 ms 16196 KB Output is correct
9 Correct 17 ms 16196 KB Output is correct
10 Correct 16 ms 16196 KB Output is correct
11 Correct 16 ms 16196 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 15864 KB Output is correct
2 Correct 17 ms 16048 KB Output is correct
3 Correct 15 ms 16048 KB Output is correct
4 Correct 15 ms 16080 KB Output is correct
5 Correct 16 ms 16080 KB Output is correct
6 Correct 15 ms 16196 KB Output is correct
7 Correct 16 ms 16196 KB Output is correct
8 Correct 17 ms 16196 KB Output is correct
9 Correct 17 ms 16196 KB Output is correct
10 Correct 16 ms 16196 KB Output is correct
11 Correct 16 ms 16196 KB Output is correct
12 Correct 16 ms 16196 KB Output is correct
13 Correct 16 ms 16196 KB Output is correct
14 Correct 17 ms 16196 KB Output is correct
15 Correct 15 ms 16196 KB Output is correct
16 Correct 16 ms 16196 KB Output is correct
17 Correct 16 ms 16196 KB Output is correct
18 Correct 16 ms 16196 KB Output is correct
19 Correct 16 ms 16196 KB Output is correct
20 Correct 15 ms 16196 KB Output is correct
21 Correct 16 ms 16196 KB Output is correct
22 Correct 16 ms 16196 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 15864 KB Output is correct
2 Correct 17 ms 16048 KB Output is correct
3 Correct 15 ms 16048 KB Output is correct
4 Correct 15 ms 16080 KB Output is correct
5 Correct 16 ms 16080 KB Output is correct
6 Correct 15 ms 16196 KB Output is correct
7 Correct 16 ms 16196 KB Output is correct
8 Correct 17 ms 16196 KB Output is correct
9 Correct 17 ms 16196 KB Output is correct
10 Correct 16 ms 16196 KB Output is correct
11 Correct 16 ms 16196 KB Output is correct
12 Correct 16 ms 16196 KB Output is correct
13 Correct 16 ms 16196 KB Output is correct
14 Correct 17 ms 16196 KB Output is correct
15 Correct 15 ms 16196 KB Output is correct
16 Correct 16 ms 16196 KB Output is correct
17 Correct 16 ms 16196 KB Output is correct
18 Correct 16 ms 16196 KB Output is correct
19 Correct 16 ms 16196 KB Output is correct
20 Correct 15 ms 16196 KB Output is correct
21 Correct 16 ms 16196 KB Output is correct
22 Correct 16 ms 16196 KB Output is correct
23 Correct 30 ms 16484 KB Output is correct
24 Correct 28 ms 16612 KB Output is correct
25 Correct 29 ms 16704 KB Output is correct
26 Correct 27 ms 16804 KB Output is correct
27 Correct 30 ms 17280 KB Output is correct
28 Correct 30 ms 17280 KB Output is correct
29 Correct 28 ms 17280 KB Output is correct
30 Correct 28 ms 17280 KB Output is correct
31 Correct 26 ms 17280 KB Output is correct
32 Correct 29 ms 17564 KB Output is correct
33 Correct 34 ms 17564 KB Output is correct
34 Correct 29 ms 17564 KB Output is correct
35 Correct 26 ms 17564 KB Output is correct
36 Correct 28 ms 17596 KB Output is correct
37 Correct 27 ms 17920 KB Output is correct

Subtask #4
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 15864 KB Output is correct
2 Correct 17 ms 16048 KB Output is correct
3 Correct 15 ms 16048 KB Output is correct
4 Correct 15 ms 16080 KB Output is correct
5 Correct 16 ms 16080 KB Output is correct
6 Correct 15 ms 16196 KB Output is correct
7 Correct 16 ms 16196 KB Output is correct
8 Correct 17 ms 16196 KB Output is correct
9 Correct 17 ms 16196 KB Output is correct
10 Correct 16 ms 16196 KB Output is correct
11 Correct 16 ms 16196 KB Output is correct
12 Correct 16 ms 16196 KB Output is correct
13 Correct 16 ms 16196 KB Output is correct
14 Correct 17 ms 16196 KB Output is correct
15 Correct 15 ms 16196 KB Output is correct
16 Correct 16 ms 16196 KB Output is correct
17 Correct 16 ms 16196 KB Output is correct
18 Correct 16 ms 16196 KB Output is correct
19 Correct 16 ms 16196 KB Output is correct
20 Correct 15 ms 16196 KB Output is correct
21 Correct 16 ms 16196 KB Output is correct
22 Correct 16 ms 16196 KB Output is correct
23 Correct 30 ms 16484 KB Output is correct
24 Correct 28 ms 16612 KB Output is correct
25 Correct 29 ms 16704 KB Output is correct
26 Correct 27 ms 16804 KB Output is correct
27 Correct 30 ms 17280 KB Output is correct
28 Correct 30 ms 17280 KB Output is correct
29 Correct 28 ms 17280 KB Output is correct
30 Correct 28 ms 17280 KB Output is correct
31 Correct 26 ms 17280 KB Output is correct
32 Correct 29 ms 17564 KB Output is correct
33 Correct 34 ms 17564 KB Output is correct
34 Correct 29 ms 17564 KB Output is correct
35 Correct 26 ms 17564 KB Output is correct
36 Correct 28 ms 17596 KB Output is correct
37 Correct 27 ms 17920 KB Output is correct
38 Correct 650 ms 32424 KB Output is correct
39 Correct 603 ms 37120 KB Output is correct
40 Correct 627 ms 44516 KB Output is correct
41 Correct 488 ms 46644 KB Output is correct
42 Correct 804 ms 69580 KB Output is correct
43 Correct 572 ms 69580 KB Output is correct
44 Correct 505 ms 69580 KB Output is correct
45 Correct 530 ms 69580 KB Output is correct
46 Correct 411 ms 69580 KB Output is correct
47 Correct 744 ms 77048 KB Output is correct
48 Correct 534 ms 77048 KB Output is correct
49 Correct 579 ms 77048 KB Output is correct
50 Correct 554 ms 77048 KB Output is correct
51 Correct 541 ms 77048 KB Output is correct
52 Correct 664 ms 77048 KB Output is correct