oj.uz

Submission #976272

# Submission time Handle Problem Language Result Execution time Memory
976272 2024-05-06T11:27:12 Z happy_node Event Hopping 2 (JOI21_event2) C++17
100 / 100
 273 ms 56312 KB 
#include <bits/stdc++.h>
using namespace std; 

const int MX=2e5+5;
int N,K;
int L[MX], R[MX], nxt[MX], deg[MX];

vector<pair<int,int>> ptL[MX], ptR[MX];
map<int,int> id;
vector<int> adj[MX];

int up[MX][20];

void dfs(int v) {
	for(int k=1;k<20;k++) {
		up[v][k]=up[up[v][k-1]][k-1];
	}

	for(auto u:adj[v]) {
		up[u][0]=v;
		dfs(u);
	}
}

int calc(int l, int r) {
	int v=nxt[l], res=0;
	if(v==1e9) return 0;
	if(R[v]>r) return 0;

	for(int k=19;k>=0;k--) {
		if(up[v][k]!=0 && R[up[v][k]]<=r) {
			res+=1<<k;
			v=up[v][k];
		}
	}
	return res+1;
}

bool chk(pair<int,int> p, pair<int,int> q) {
	if(p.second<=q.first) return false;
	return true;
}

int main() {
	cin.tie(0); ios_base::sync_with_stdio(0);

	cin>>N>>K;
	for(int i=1;i<=N;i++) {
		cin>>L[i]>>R[i];
		id[L[i]]=0;
		id[R[i]]=0;
	}
	int z=0;
	for(auto &[x,y]:id) {
		y=++z;
	}
	for(int i=1;i<=N;i++) {
		L[i]=id[L[i]];
		R[i]=id[R[i]];

		ptL[L[i]].push_back({R[i],i});
		ptR[R[i]].push_back({L[i],i});
	}

	pair<int,int> lst={1e9,1e9};

	for(int p=z;p>=1;p--) {
		for(auto [r,id]:ptL[p]) {
			lst=min(lst,make_pair(r,id));
		}
		nxt[p]=lst.second;
		for(auto [l,id]:ptR[p]) {
			if(lst.second!=1e9) {
				adj[lst.second].push_back(id);
			}
		}
	}

	for(int i=1;i<=N;i++) {
		for(auto j:adj[i]) deg[j]+=1;
	}
	
	for(int i=1;i<=N;i++) {
		if(!deg[i]) {
			dfs(i);
		}
	}

	set<pair<int,int>> ranges;

	vector<int> ans;

	int prv=calc(1,z);

	for(int i=1;i<=N;i++) {
		int a=1,b=z;
		auto it=ranges.lower_bound(make_pair(R[i],0));
		if(it!=ranges.begin()) {
			it--;
			if(chk(*it,make_pair(L[i],R[i]))) continue; // intersected
			a=it->second;
		} 
		
		auto itt=ranges.lower_bound(make_pair(R[i],0));
		if(itt!=ranges.end()) {
			b=itt->first;
		}
		if(prv+1+calc(a,L[i])+calc(R[i],b)-calc(a,b)>=K) {
			assert(L[i]<=R[i]);
			prv+=1+calc(a,L[i])+calc(R[i],b)-calc(a,b);
			ranges.insert({L[i],R[i]});
			ans.push_back(i);
		}
		if(ans.size()==K) break;
	}	

	if(ans.size()<K) {
		cout<<-1<<'\n';
		return 0;
	}

	for(auto x:ans) {
		cout<<x<<'\n';
	}
}

Compilation message

event2.cpp: In function 'int main()':
event2.cpp:114:16: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  114 |   if(ans.size()==K) break;
      |      ~~~~~~~~~~^~~
event2.cpp:117:15: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  117 |  if(ans.size()<K) {
      |     ~~~~~~~~~~^~

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 16732 KB Output is correct
2 Correct 4 ms 16836 KB Output is correct
3 Correct 3 ms 16852 KB Output is correct
4 Correct 136 ms 53964 KB Output is correct
5 Correct 125 ms 53748 KB Output is correct
6 Correct 118 ms 53296 KB Output is correct
7 Correct 114 ms 52940 KB Output is correct
8 Correct 135 ms 54108 KB Output is correct
9 Correct 118 ms 53704 KB Output is correct
10 Correct 117 ms 53448 KB Output is correct
11 Correct 113 ms 53248 KB Output is correct
12 Correct 108 ms 49316 KB Output is correct
13 Correct 110 ms 49048 KB Output is correct
14 Correct 110 ms 48916 KB Output is correct
15 Correct 101 ms 48592 KB Output is correct
16 Correct 92 ms 44112 KB Output is correct
17 Correct 101 ms 43864 KB Output is correct
18 Correct 89 ms 43772 KB Output is correct
19 Correct 100 ms 42560 KB Output is correct
20 Correct 93 ms 42324 KB Output is correct
21 Correct 112 ms 44348 KB Output is correct
22 Correct 100 ms 43864 KB Output is correct
23 Correct 104 ms 44108 KB Output is correct
24 Correct 113 ms 44004 KB Output is correct
25 Correct 134 ms 43860 KB Output is correct
26 Correct 136 ms 43964 KB Output is correct
27 Correct 113 ms 43856 KB Output is correct
28 Correct 98 ms 50460 KB Output is correct
29 Correct 94 ms 47952 KB Output is correct
30 Correct 99 ms 45120 KB Output is correct
31 Correct 109 ms 44240 KB Output is correct
32 Correct 118 ms 43856 KB Output is correct
33 Correct 125 ms 43748 KB Output is correct
34 Correct 108 ms 49868 KB Output is correct
35 Correct 93 ms 49324 KB Output is correct
36 Correct 86 ms 48464 KB Output is correct
37 Correct 132 ms 50128 KB Output is correct
38 Correct 114 ms 50040 KB Output is correct
39 Correct 111 ms 49868 KB Output is correct
40 Correct 110 ms 49616 KB Output is correct
41 Correct 110 ms 49856 KB Output is correct
42 Correct 99 ms 47192 KB Output is correct
43 Correct 102 ms 49868 KB Output is correct
44 Correct 115 ms 49872 KB Output is correct
45 Correct 99 ms 49648 KB Output is correct
46 Correct 103 ms 49616 KB Output is correct

Subtask #2
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 16732 KB Output is correct
2 Correct 4 ms 16732 KB Output is correct
3 Correct 4 ms 16732 KB Output is correct
4 Correct 3 ms 16852 KB Output is correct
5 Correct 4 ms 16732 KB Output is correct
6 Correct 4 ms 16832 KB Output is correct
7 Correct 3 ms 16728 KB Output is correct
8 Correct 3 ms 16732 KB Output is correct
9 Correct 4 ms 16732 KB Output is correct
10 Correct 4 ms 16728 KB Output is correct
11 Correct 4 ms 16732 KB Output is correct
12 Correct 3 ms 16732 KB Output is correct
13 Correct 3 ms 16732 KB Output is correct
14 Correct 4 ms 16732 KB Output is correct
15 Correct 3 ms 16984 KB Output is correct
16 Correct 3 ms 16732 KB Output is correct
17 Correct 3 ms 16732 KB Output is correct
18 Correct 5 ms 16732 KB Output is correct
19 Correct 4 ms 16892 KB Output is correct
20 Correct 3 ms 16732 KB Output is correct
21 Correct 4 ms 16732 KB Output is correct
22 Correct 4 ms 16732 KB Output is correct
23 Correct 3 ms 16732 KB Output is correct
24 Correct 3 ms 16732 KB Output is correct
25 Correct 4 ms 16732 KB Output is correct
26 Correct 4 ms 16732 KB Output is correct
27 Correct 4 ms 16732 KB Output is correct

Subtask #3
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 16732 KB Output is correct
2 Correct 4 ms 16732 KB Output is correct
3 Correct 4 ms 16732 KB Output is correct
4 Correct 3 ms 16852 KB Output is correct
5 Correct 4 ms 16732 KB Output is correct
6 Correct 4 ms 16832 KB Output is correct
7 Correct 3 ms 16728 KB Output is correct
8 Correct 3 ms 16732 KB Output is correct
9 Correct 4 ms 16732 KB Output is correct
10 Correct 4 ms 16728 KB Output is correct
11 Correct 4 ms 16732 KB Output is correct
12 Correct 3 ms 16732 KB Output is correct
13 Correct 3 ms 16732 KB Output is correct
14 Correct 4 ms 16732 KB Output is correct
15 Correct 3 ms 16984 KB Output is correct
16 Correct 3 ms 16732 KB Output is correct
17 Correct 3 ms 16732 KB Output is correct
18 Correct 5 ms 16732 KB Output is correct
19 Correct 4 ms 16892 KB Output is correct
20 Correct 3 ms 16732 KB Output is correct
21 Correct 4 ms 16732 KB Output is correct
22 Correct 4 ms 16732 KB Output is correct
23 Correct 3 ms 16732 KB Output is correct
24 Correct 3 ms 16732 KB Output is correct
25 Correct 4 ms 16732 KB Output is correct
26 Correct 4 ms 16732 KB Output is correct
27 Correct 4 ms 16732 KB Output is correct
28 Correct 7 ms 19428 KB Output is correct
29 Correct 7 ms 19548 KB Output is correct
30 Correct 7 ms 19544 KB Output is correct
31 Correct 6 ms 19544 KB Output is correct
32 Correct 7 ms 19548 KB Output is correct
33 Correct 8 ms 19548 KB Output is correct
34 Correct 7 ms 19544 KB Output is correct
35 Correct 8 ms 19804 KB Output is correct
36 Correct 8 ms 19804 KB Output is correct
37 Correct 7 ms 17756 KB Output is correct
38 Correct 7 ms 19804 KB Output is correct
39 Correct 10 ms 19800 KB Output is correct
40 Correct 9 ms 17756 KB Output is correct
41 Correct 9 ms 19804 KB Output is correct
42 Correct 7 ms 19804 KB Output is correct
43 Correct 7 ms 19800 KB Output is correct
44 Correct 8 ms 19804 KB Output is correct
45 Correct 9 ms 17752 KB Output is correct
46 Correct 8 ms 19544 KB Output is correct
47 Correct 8 ms 19548 KB Output is correct
48 Correct 7 ms 19548 KB Output is correct
49 Correct 7 ms 19600 KB Output is correct
50 Correct 8 ms 19548 KB Output is correct
51 Correct 7 ms 19548 KB Output is correct
52 Correct 7 ms 19548 KB Output is correct
53 Correct 7 ms 19544 KB Output is correct
54 Correct 7 ms 19548 KB Output is correct
55 Correct 6 ms 17756 KB Output is correct
56 Correct 6 ms 17756 KB Output is correct
57 Correct 7 ms 17756 KB Output is correct
58 Correct 7 ms 17756 KB Output is correct
59 Correct 7 ms 17756 KB Output is correct
60 Correct 6 ms 17756 KB Output is correct
61 Correct 6 ms 17756 KB Output is correct
62 Correct 6 ms 17852 KB Output is correct
63 Correct 6 ms 17756 KB Output is correct
64 Correct 6 ms 17756 KB Output is correct

Subtask #4
61.0 / 61.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 16732 KB Output is correct
2 Correct 4 ms 16836 KB Output is correct
3 Correct 3 ms 16852 KB Output is correct
4 Correct 136 ms 53964 KB Output is correct
5 Correct 125 ms 53748 KB Output is correct
6 Correct 118 ms 53296 KB Output is correct
7 Correct 114 ms 52940 KB Output is correct
8 Correct 135 ms 54108 KB Output is correct
9 Correct 118 ms 53704 KB Output is correct
10 Correct 117 ms 53448 KB Output is correct
11 Correct 113 ms 53248 KB Output is correct
12 Correct 108 ms 49316 KB Output is correct
13 Correct 110 ms 49048 KB Output is correct
14 Correct 110 ms 48916 KB Output is correct
15 Correct 101 ms 48592 KB Output is correct
16 Correct 92 ms 44112 KB Output is correct
17 Correct 101 ms 43864 KB Output is correct
18 Correct 89 ms 43772 KB Output is correct
19 Correct 100 ms 42560 KB Output is correct
20 Correct 93 ms 42324 KB Output is correct
21 Correct 112 ms 44348 KB Output is correct
22 Correct 100 ms 43864 KB Output is correct
23 Correct 104 ms 44108 KB Output is correct
24 Correct 113 ms 44004 KB Output is correct
25 Correct 134 ms 43860 KB Output is correct
26 Correct 136 ms 43964 KB Output is correct
27 Correct 113 ms 43856 KB Output is correct
28 Correct 98 ms 50460 KB Output is correct
29 Correct 94 ms 47952 KB Output is correct
30 Correct 99 ms 45120 KB Output is correct
31 Correct 109 ms 44240 KB Output is correct
32 Correct 118 ms 43856 KB Output is correct
33 Correct 125 ms 43748 KB Output is correct
34 Correct 108 ms 49868 KB Output is correct
35 Correct 93 ms 49324 KB Output is correct
36 Correct 86 ms 48464 KB Output is correct
37 Correct 132 ms 50128 KB Output is correct
38 Correct 114 ms 50040 KB Output is correct
39 Correct 111 ms 49868 KB Output is correct
40 Correct 110 ms 49616 KB Output is correct
41 Correct 110 ms 49856 KB Output is correct
42 Correct 99 ms 47192 KB Output is correct
43 Correct 102 ms 49868 KB Output is correct
44 Correct 115 ms 49872 KB Output is correct
45 Correct 99 ms 49648 KB Output is correct
46 Correct 103 ms 49616 KB Output is correct
47 Correct 4 ms 16732 KB Output is correct
48 Correct 4 ms 16732 KB Output is correct
49 Correct 4 ms 16732 KB Output is correct
50 Correct 3 ms 16852 KB Output is correct
51 Correct 4 ms 16732 KB Output is correct
52 Correct 4 ms 16832 KB Output is correct
53 Correct 3 ms 16728 KB Output is correct
54 Correct 3 ms 16732 KB Output is correct
55 Correct 4 ms 16732 KB Output is correct
56 Correct 4 ms 16728 KB Output is correct
57 Correct 4 ms 16732 KB Output is correct
58 Correct 3 ms 16732 KB Output is correct
59 Correct 3 ms 16732 KB Output is correct
60 Correct 4 ms 16732 KB Output is correct
61 Correct 3 ms 16984 KB Output is correct
62 Correct 3 ms 16732 KB Output is correct
63 Correct 3 ms 16732 KB Output is correct
64 Correct 5 ms 16732 KB Output is correct
65 Correct 4 ms 16892 KB Output is correct
66 Correct 3 ms 16732 KB Output is correct
67 Correct 4 ms 16732 KB Output is correct
68 Correct 4 ms 16732 KB Output is correct
69 Correct 3 ms 16732 KB Output is correct
70 Correct 3 ms 16732 KB Output is correct
71 Correct 4 ms 16732 KB Output is correct
72 Correct 4 ms 16732 KB Output is correct
73 Correct 4 ms 16732 KB Output is correct
74 Correct 7 ms 19428 KB Output is correct
75 Correct 7 ms 19548 KB Output is correct
76 Correct 7 ms 19544 KB Output is correct
77 Correct 6 ms 19544 KB Output is correct
78 Correct 7 ms 19548 KB Output is correct
79 Correct 8 ms 19548 KB Output is correct
80 Correct 7 ms 19544 KB Output is correct
81 Correct 8 ms 19804 KB Output is correct
82 Correct 8 ms 19804 KB Output is correct
83 Correct 7 ms 17756 KB Output is correct
84 Correct 7 ms 19804 KB Output is correct
85 Correct 10 ms 19800 KB Output is correct
86 Correct 9 ms 17756 KB Output is correct
87 Correct 9 ms 19804 KB Output is correct
88 Correct 7 ms 19804 KB Output is correct
89 Correct 7 ms 19800 KB Output is correct
90 Correct 8 ms 19804 KB Output is correct
91 Correct 9 ms 17752 KB Output is correct
92 Correct 8 ms 19544 KB Output is correct
93 Correct 8 ms 19548 KB Output is correct
94 Correct 7 ms 19548 KB Output is correct
95 Correct 7 ms 19600 KB Output is correct
96 Correct 8 ms 19548 KB Output is correct
97 Correct 7 ms 19548 KB Output is correct
98 Correct 7 ms 19548 KB Output is correct
99 Correct 7 ms 19544 KB Output is correct
100 Correct 7 ms 19548 KB Output is correct
101 Correct 6 ms 17756 KB Output is correct
102 Correct 6 ms 17756 KB Output is correct
103 Correct 7 ms 17756 KB Output is correct
104 Correct 7 ms 17756 KB Output is correct
105 Correct 7 ms 17756 KB Output is correct
106 Correct 6 ms 17756 KB Output is correct
107 Correct 6 ms 17756 KB Output is correct
108 Correct 6 ms 17852 KB Output is correct
109 Correct 6 ms 17756 KB Output is correct
110 Correct 6 ms 17756 KB Output is correct
111 Correct 202 ms 44568 KB Output is correct
112 Correct 183 ms 44368 KB Output is correct
113 Correct 205 ms 44604 KB Output is correct
114 Correct 193 ms 44456 KB Output is correct
115 Correct 259 ms 44368 KB Output is correct
116 Correct 205 ms 44432 KB Output is correct
117 Correct 199 ms 44476 KB Output is correct
118 Correct 245 ms 56312 KB Output is correct
119 Correct 252 ms 55824 KB Output is correct
120 Correct 209 ms 50480 KB Output is correct
121 Correct 235 ms 48340 KB Output is correct
122 Correct 247 ms 51124 KB Output is correct
123 Correct 227 ms 51408 KB Output is correct
124 Correct 214 ms 51152 KB Output is correct
125 Correct 225 ms 47952 KB Output is correct
126 Correct 263 ms 46580 KB Output is correct
127 Correct 192 ms 46332 KB Output is correct
128 Correct 187 ms 46404 KB Output is correct
129 Correct 273 ms 45312 KB Output is correct
130 Correct 187 ms 44880 KB Output is correct
131 Correct 248 ms 45064 KB Output is correct
132 Correct 190 ms 44880 KB Output is correct
133 Correct 219 ms 44624 KB Output is correct
134 Correct 214 ms 44820 KB Output is correct
135 Correct 190 ms 44628 KB Output is correct
136 Correct 197 ms 44628 KB Output is correct
137 Correct 250 ms 44492 KB Output is correct
138 Correct 178 ms 44368 KB Output is correct
139 Correct 188 ms 44324 KB Output is correct
140 Correct 187 ms 44372 KB Output is correct
141 Correct 255 ms 44544 KB Output is correct
142 Correct 132 ms 51820 KB Output is correct
143 Correct 137 ms 51776 KB Output is correct
144 Correct 155 ms 51644 KB Output is correct
145 Correct 158 ms 51808 KB Output is correct
146 Correct 117 ms 51644 KB Output is correct
147 Correct 121 ms 51404 KB Output is correct
148 Correct 128 ms 51288 KB Output is correct
149 Correct 120 ms 51236 KB Output is correct
150 Correct 132 ms 51160 KB Output is correct
151 Correct 108 ms 50532 KB Output is correct
152 Correct 90 ms 46024 KB Output is correct
153 Correct 130 ms 51660 KB Output is correct
154 Correct 127 ms 51660 KB Output is correct
155 Correct 117 ms 51384 KB Output is correct
156 Correct 129 ms 51668 KB Output is correct
157 Correct 116 ms 51400 KB Output is correct
158 Correct 117 ms 51144 KB Output is correct
159 Correct 116 ms 50636 KB Output is correct
160 Correct 115 ms 46164 KB Output is correct
161 Correct 200 ms 48084 KB Output is correct
162 Correct 192 ms 48080 KB Output is correct
163 Correct 241 ms 47924 KB Output is correct
164 Correct 186 ms 47824 KB Output is correct
165 Correct 189 ms 47568 KB Output is correct
166 Correct 96 ms 47160 KB Output is correct
167 Correct 106 ms 49872 KB Output is correct
168 Correct 109 ms 49868 KB Output is correct
169 Correct 105 ms 49692 KB Output is correct
170 Correct 104 ms 49560 KB Output is correct
171 Correct 111 ms 49356 KB Output is correct
172 Correct 116 ms 50640 KB Output is correct
173 Correct 202 ms 47072 KB Output is correct
174 Correct 189 ms 47144 KB Output is correct
175 Correct 186 ms 47056 KB Output is correct
176 Correct 232 ms 46628 KB Output is correct