oj.uz

Submission #477491

# Submission time Handle Problem Language Result Execution time Memory
477491 2021-10-02T09:36:58 Z dennisstar Event Hopping 2 (JOI21_event2) C++17
100 / 100
 1045 ms 10736 KB 
#include <bits/stdc++.h>

using namespace std;

const int B = 300;

struct myst {
	vector<pair<int, int>> p, nxt;
	void init() {
		int n=p.size();
		nxt.resize(n);
		for (int i=n-1; i>=0; i--) {
			auto b=lower_bound(p.begin(), p.end(), pair<int, int>(p[i].second, 0))-p.begin();
			if (b>=p.size()) nxt[i]={p[i].second, 0};
			else nxt[i]=nxt[b];
			nxt[i].second++;
		}
	}
	pair<int, int> get(int x) {
		auto k=lower_bound(p.begin(), p.end(), pair<int, int>(x, 0))-p.begin();
		if (k>=p.size()) return {x, 0};
		return nxt[k];
	}
};

int getmx(int s, int e, vector<myst> &st) {
	int r=0, x=1;
	for (auto &i:st) if (i.p.size()) {
		if (i.p.back().second<=s) {
			auto k=i.get(x);
			x=k.first;
			r+=k.second;
		}
		else {
			for (auto &j:i.p) {
				if (j.second>s) break;
				if (x<=j.first) r++, x=j.second;
			}
			break;
		}
	}
	x=e;
	int fl=0;
	for (auto &i:st) if (i.p.size()&&i.p.back().first>=e) {
		if (!fl) {
			fl=1;
			for (auto &j:i.p) if (x<=j.first) r++, x=j.second;
			continue;
		}
		auto k=i.get(x);
		x=k.first;
		r+=k.second;
	}
	return r;
}

int main() {
	cin.tie(0)->sync_with_stdio(0);

	int n, k;
	cin>>n>>k;
	vector<pair<int, int>> v(n), s;
	for (auto &i:v) cin>>i.first>>i.second, s.emplace_back(i);
	
	sort(s.begin(), s.end());
	vector<pair<int, int>> w;
	for (auto &i:s) {
		if (w.size()&&w.back().first==i.first) continue;
		while (w.size()&&w.back().second>=i.second) w.pop_back();
		w.emplace_back(i);
	}
	
	vector<myst> st((w.size()+B-1)/B);
	for (int i=0; i<w.size(); i+=B) {
		int e=min(i+B, (int)w.size());
		for (int j=i; j<e; j++) st[i/B].p.emplace_back(w[j]);
		st[i/B].init();
	}

	if (getmx(0, 0, st)<k) {
		cout<<-1;
		return 0;
	}

	set<pair<int, int>> vl;
	auto col = [&](pair<int, int> p) {
		auto k=vl.lower_bound({p.first, 0});
		if (k!=vl.end()&&k->first<p.second) return 0;
		if (k!=vl.begin()&&prev(k)->second>p.first) return 0;
		return 1;
	};

	for (int t=0; k&&t<n; t++) if (col(v[t])&&getmx(v[t].first, v[t].second, st)>=k-1) {
		vl.emplace(v[t]);
		cout<<t+1<<'\n';
		auto [s, e]=v[t];
		for (auto &i:st) if (i.p.size()) {
			int l=i.p[0].first, r=i.p.back().second;
			if (r<=s||e<=l) continue;
			if (s<=l&&r<=e) {
				i.p.clear();
				continue;
			}
			vector<pair<int, int>> pp;
			for (auto &j:i.p) if (j.second<=s||j.first>=e) pp.emplace_back(j);
			swap(pp, i.p);
			i.init();
		}
		k--;
	}

	return 0;
}

Compilation message

event2.cpp: In member function 'void myst::init()':
event2.cpp:14:9: warning: comparison of integer expressions of different signedness: 'long int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   14 |    if (b>=p.size()) nxt[i]={p[i].second, 0};
      |        ~^~~~~~~~~~
event2.cpp: In member function 'std::pair<int, int> myst::get(int)':
event2.cpp:21:8: warning: comparison of integer expressions of different signedness: 'long int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   21 |   if (k>=p.size()) return {x, 0};
      |       ~^~~~~~~~~~
event2.cpp: In function 'int main()':
event2.cpp:74:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   74 |  for (int i=0; i<w.size(); i+=B) {
      |                ~^~~~~~~~~

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 852 ms 8316 KB Output is correct
5 Correct 818 ms 8284 KB Output is correct
6 Correct 806 ms 8044 KB Output is correct
7 Correct 725 ms 7604 KB Output is correct
8 Correct 855 ms 8376 KB Output is correct
9 Correct 808 ms 8408 KB Output is correct
10 Correct 803 ms 7968 KB Output is correct
11 Correct 751 ms 7636 KB Output is correct
12 Correct 658 ms 6440 KB Output is correct
13 Correct 644 ms 6328 KB Output is correct
14 Correct 599 ms 6184 KB Output is correct
15 Correct 554 ms 5956 KB Output is correct
16 Correct 168 ms 3520 KB Output is correct
17 Correct 145 ms 3512 KB Output is correct
18 Correct 131 ms 3504 KB Output is correct
19 Correct 46 ms 2368 KB Output is correct
20 Correct 40 ms 2424 KB Output is correct
21 Correct 38 ms 2324 KB Output is correct
22 Correct 31 ms 2244 KB Output is correct
23 Correct 30 ms 2252 KB Output is correct
24 Correct 28 ms 2188 KB Output is correct
25 Correct 29 ms 2132 KB Output is correct
26 Correct 26 ms 2216 KB Output is correct
27 Correct 28 ms 2272 KB Output is correct
28 Correct 29 ms 4708 KB Output is correct
29 Correct 28 ms 4548 KB Output is correct
30 Correct 32 ms 3440 KB Output is correct
31 Correct 26 ms 2412 KB Output is correct
32 Correct 28 ms 2228 KB Output is correct
33 Correct 28 ms 2156 KB Output is correct
34 Correct 458 ms 5696 KB Output is correct
35 Correct 327 ms 5196 KB Output is correct
36 Correct 178 ms 4896 KB Output is correct
37 Correct 370 ms 5200 KB Output is correct
38 Correct 348 ms 5168 KB Output is correct
39 Correct 355 ms 5184 KB Output is correct
40 Correct 312 ms 5064 KB Output is correct
41 Correct 325 ms 4928 KB Output is correct
42 Correct 26 ms 3268 KB Output is correct
43 Correct 335 ms 5220 KB Output is correct
44 Correct 327 ms 5084 KB Output is correct
45 Correct 304 ms 5056 KB Output is correct
46 Correct 289 ms 4976 KB Output is correct

Subtask #2
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 0 ms 208 KB Output is correct
9 Correct 0 ms 208 KB Output is correct
10 Correct 1 ms 208 KB Output is correct
11 Correct 0 ms 208 KB Output is correct
12 Correct 1 ms 208 KB Output is correct
13 Correct 0 ms 208 KB Output is correct
14 Correct 1 ms 208 KB Output is correct
15 Correct 0 ms 208 KB Output is correct
16 Correct 0 ms 208 KB Output is correct
17 Correct 0 ms 208 KB Output is correct
18 Correct 0 ms 208 KB Output is correct
19 Correct 0 ms 208 KB Output is correct
20 Correct 1 ms 208 KB Output is correct
21 Correct 1 ms 208 KB Output is correct
22 Correct 1 ms 208 KB Output is correct
23 Correct 1 ms 304 KB Output is correct
24 Correct 1 ms 208 KB Output is correct
25 Correct 0 ms 208 KB Output is correct
26 Correct 0 ms 208 KB Output is correct
27 Correct 0 ms 208 KB Output is correct

Subtask #3
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 0 ms 208 KB Output is correct
9 Correct 0 ms 208 KB Output is correct
10 Correct 1 ms 208 KB Output is correct
11 Correct 0 ms 208 KB Output is correct
12 Correct 1 ms 208 KB Output is correct
13 Correct 0 ms 208 KB Output is correct
14 Correct 1 ms 208 KB Output is correct
15 Correct 0 ms 208 KB Output is correct
16 Correct 0 ms 208 KB Output is correct
17 Correct 0 ms 208 KB Output is correct
18 Correct 0 ms 208 KB Output is correct
19 Correct 0 ms 208 KB Output is correct
20 Correct 1 ms 208 KB Output is correct
21 Correct 1 ms 208 KB Output is correct
22 Correct 1 ms 208 KB Output is correct
23 Correct 1 ms 304 KB Output is correct
24 Correct 1 ms 208 KB Output is correct
25 Correct 0 ms 208 KB Output is correct
26 Correct 0 ms 208 KB Output is correct
27 Correct 0 ms 208 KB Output is correct
28 Correct 2 ms 336 KB Output is correct
29 Correct 2 ms 336 KB Output is correct
30 Correct 1 ms 460 KB Output is correct
31 Correct 2 ms 336 KB Output is correct
32 Correct 1 ms 464 KB Output is correct
33 Correct 1 ms 336 KB Output is correct
34 Correct 1 ms 464 KB Output is correct
35 Correct 16 ms 592 KB Output is correct
36 Correct 15 ms 592 KB Output is correct
37 Correct 14 ms 592 KB Output is correct
38 Correct 2 ms 464 KB Output is correct
39 Correct 14 ms 592 KB Output is correct
40 Correct 15 ms 540 KB Output is correct
41 Correct 14 ms 536 KB Output is correct
42 Correct 2 ms 464 KB Output is correct
43 Correct 8 ms 592 KB Output is correct
44 Correct 7 ms 520 KB Output is correct
45 Correct 6 ms 464 KB Output is correct
46 Correct 2 ms 464 KB Output is correct
47 Correct 2 ms 464 KB Output is correct
48 Correct 2 ms 464 KB Output is correct
49 Correct 2 ms 460 KB Output is correct
50 Correct 1 ms 464 KB Output is correct
51 Correct 2 ms 336 KB Output is correct
52 Correct 2 ms 440 KB Output is correct
53 Correct 2 ms 336 KB Output is correct
54 Correct 2 ms 464 KB Output is correct
55 Correct 16 ms 592 KB Output is correct
56 Correct 16 ms 588 KB Output is correct
57 Correct 15 ms 612 KB Output is correct
58 Correct 15 ms 592 KB Output is correct
59 Correct 15 ms 536 KB Output is correct
60 Correct 15 ms 600 KB Output is correct
61 Correct 17 ms 580 KB Output is correct
62 Correct 16 ms 604 KB Output is correct
63 Correct 15 ms 592 KB Output is correct
64 Correct 2 ms 464 KB Output is correct

Subtask #4
61.0 / 61.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 852 ms 8316 KB Output is correct
5 Correct 818 ms 8284 KB Output is correct
6 Correct 806 ms 8044 KB Output is correct
7 Correct 725 ms 7604 KB Output is correct
8 Correct 855 ms 8376 KB Output is correct
9 Correct 808 ms 8408 KB Output is correct
10 Correct 803 ms 7968 KB Output is correct
11 Correct 751 ms 7636 KB Output is correct
12 Correct 658 ms 6440 KB Output is correct
13 Correct 644 ms 6328 KB Output is correct
14 Correct 599 ms 6184 KB Output is correct
15 Correct 554 ms 5956 KB Output is correct
16 Correct 168 ms 3520 KB Output is correct
17 Correct 145 ms 3512 KB Output is correct
18 Correct 131 ms 3504 KB Output is correct
19 Correct 46 ms 2368 KB Output is correct
20 Correct 40 ms 2424 KB Output is correct
21 Correct 38 ms 2324 KB Output is correct
22 Correct 31 ms 2244 KB Output is correct
23 Correct 30 ms 2252 KB Output is correct
24 Correct 28 ms 2188 KB Output is correct
25 Correct 29 ms 2132 KB Output is correct
26 Correct 26 ms 2216 KB Output is correct
27 Correct 28 ms 2272 KB Output is correct
28 Correct 29 ms 4708 KB Output is correct
29 Correct 28 ms 4548 KB Output is correct
30 Correct 32 ms 3440 KB Output is correct
31 Correct 26 ms 2412 KB Output is correct
32 Correct 28 ms 2228 KB Output is correct
33 Correct 28 ms 2156 KB Output is correct
34 Correct 458 ms 5696 KB Output is correct
35 Correct 327 ms 5196 KB Output is correct
36 Correct 178 ms 4896 KB Output is correct
37 Correct 370 ms 5200 KB Output is correct
38 Correct 348 ms 5168 KB Output is correct
39 Correct 355 ms 5184 KB Output is correct
40 Correct 312 ms 5064 KB Output is correct
41 Correct 325 ms 4928 KB Output is correct
42 Correct 26 ms 3268 KB Output is correct
43 Correct 335 ms 5220 KB Output is correct
44 Correct 327 ms 5084 KB Output is correct
45 Correct 304 ms 5056 KB Output is correct
46 Correct 289 ms 4976 KB Output is correct
47 Correct 0 ms 204 KB Output is correct
48 Correct 0 ms 204 KB Output is correct
49 Correct 0 ms 204 KB Output is correct
50 Correct 0 ms 204 KB Output is correct
51 Correct 0 ms 204 KB Output is correct
52 Correct 0 ms 204 KB Output is correct
53 Correct 1 ms 204 KB Output is correct
54 Correct 0 ms 208 KB Output is correct
55 Correct 0 ms 208 KB Output is correct
56 Correct 1 ms 208 KB Output is correct
57 Correct 0 ms 208 KB Output is correct
58 Correct 1 ms 208 KB Output is correct
59 Correct 0 ms 208 KB Output is correct
60 Correct 1 ms 208 KB Output is correct
61 Correct 0 ms 208 KB Output is correct
62 Correct 0 ms 208 KB Output is correct
63 Correct 0 ms 208 KB Output is correct
64 Correct 0 ms 208 KB Output is correct
65 Correct 0 ms 208 KB Output is correct
66 Correct 1 ms 208 KB Output is correct
67 Correct 1 ms 208 KB Output is correct
68 Correct 1 ms 208 KB Output is correct
69 Correct 1 ms 304 KB Output is correct
70 Correct 1 ms 208 KB Output is correct
71 Correct 0 ms 208 KB Output is correct
72 Correct 0 ms 208 KB Output is correct
73 Correct 0 ms 208 KB Output is correct
74 Correct 2 ms 336 KB Output is correct
75 Correct 2 ms 336 KB Output is correct
76 Correct 1 ms 460 KB Output is correct
77 Correct 2 ms 336 KB Output is correct
78 Correct 1 ms 464 KB Output is correct
79 Correct 1 ms 336 KB Output is correct
80 Correct 1 ms 464 KB Output is correct
81 Correct 16 ms 592 KB Output is correct
82 Correct 15 ms 592 KB Output is correct
83 Correct 14 ms 592 KB Output is correct
84 Correct 2 ms 464 KB Output is correct
85 Correct 14 ms 592 KB Output is correct
86 Correct 15 ms 540 KB Output is correct
87 Correct 14 ms 536 KB Output is correct
88 Correct 2 ms 464 KB Output is correct
89 Correct 8 ms 592 KB Output is correct
90 Correct 7 ms 520 KB Output is correct
91 Correct 6 ms 464 KB Output is correct
92 Correct 2 ms 464 KB Output is correct
93 Correct 2 ms 464 KB Output is correct
94 Correct 2 ms 464 KB Output is correct
95 Correct 2 ms 460 KB Output is correct
96 Correct 1 ms 464 KB Output is correct
97 Correct 2 ms 336 KB Output is correct
98 Correct 2 ms 440 KB Output is correct
99 Correct 2 ms 336 KB Output is correct
100 Correct 2 ms 464 KB Output is correct
101 Correct 16 ms 592 KB Output is correct
102 Correct 16 ms 588 KB Output is correct
103 Correct 15 ms 612 KB Output is correct
104 Correct 15 ms 592 KB Output is correct
105 Correct 15 ms 536 KB Output is correct
106 Correct 15 ms 600 KB Output is correct
107 Correct 17 ms 580 KB Output is correct
108 Correct 16 ms 604 KB Output is correct
109 Correct 15 ms 592 KB Output is correct
110 Correct 2 ms 464 KB Output is correct
111 Correct 43 ms 3916 KB Output is correct
112 Correct 41 ms 3900 KB Output is correct
113 Correct 39 ms 3900 KB Output is correct
114 Correct 37 ms 3948 KB Output is correct
115 Correct 36 ms 3856 KB Output is correct
116 Correct 33 ms 3940 KB Output is correct
117 Correct 32 ms 3908 KB Output is correct
118 Correct 1045 ms 10328 KB Output is correct
119 Correct 999 ms 9900 KB Output is correct
120 Correct 678 ms 7900 KB Output is correct
121 Correct 39 ms 6552 KB Output is correct
122 Correct 803 ms 8264 KB Output is correct
123 Correct 717 ms 8036 KB Output is correct
124 Correct 672 ms 7812 KB Output is correct
125 Correct 38 ms 6512 KB Output is correct
126 Correct 245 ms 5716 KB Output is correct
127 Correct 172 ms 5452 KB Output is correct
128 Correct 153 ms 5496 KB Output is correct
129 Correct 36 ms 5316 KB Output is correct
130 Correct 81 ms 4352 KB Output is correct
131 Correct 67 ms 4360 KB Output is correct
132 Correct 54 ms 4284 KB Output is correct
133 Correct 37 ms 4300 KB Output is correct
134 Correct 55 ms 3948 KB Output is correct
135 Correct 46 ms 3952 KB Output is correct
136 Correct 40 ms 3984 KB Output is correct
137 Correct 35 ms 3952 KB Output is correct
138 Correct 41 ms 3904 KB Output is correct
139 Correct 35 ms 3968 KB Output is correct
140 Correct 33 ms 3832 KB Output is correct
141 Correct 34 ms 3908 KB Output is correct
142 Correct 863 ms 10692 KB Output is correct
143 Correct 878 ms 10616 KB Output is correct
144 Correct 840 ms 10736 KB Output is correct
145 Correct 908 ms 10688 KB Output is correct
146 Correct 835 ms 10684 KB Output is correct
147 Correct 818 ms 10500 KB Output is correct
148 Correct 832 ms 10516 KB Output is correct
149 Correct 777 ms 10332 KB Output is correct
150 Correct 813 ms 10344 KB Output is correct
151 Correct 702 ms 9916 KB Output is correct
152 Correct 28 ms 6724 KB Output is correct
153 Correct 896 ms 10672 KB Output is correct
154 Correct 814 ms 10684 KB Output is correct
155 Correct 846 ms 10492 KB Output is correct
156 Correct 811 ms 10352 KB Output is correct
157 Correct 777 ms 10256 KB Output is correct
158 Correct 794 ms 10364 KB Output is correct
159 Correct 739 ms 9892 KB Output is correct
160 Correct 27 ms 6732 KB Output is correct
161 Correct 626 ms 8136 KB Output is correct
162 Correct 643 ms 7964 KB Output is correct
163 Correct 602 ms 7884 KB Output is correct
164 Correct 636 ms 7948 KB Output is correct
165 Correct 656 ms 7796 KB Output is correct
166 Correct 31 ms 5228 KB Output is correct
167 Correct 334 ms 7056 KB Output is correct
168 Correct 344 ms 7080 KB Output is correct
169 Correct 321 ms 6976 KB Output is correct
170 Correct 293 ms 6904 KB Output is correct
171 Correct 503 ms 7348 KB Output is correct
172 Correct 487 ms 7984 KB Output is correct
173 Correct 817 ms 8064 KB Output is correct
174 Correct 843 ms 8108 KB Output is correct
175 Correct 817 ms 8032 KB Output is correct
176 Correct 597 ms 7624 KB Output is correct