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Submission #538587

# Submission time Handle Problem Language Result Execution time Memory
538587 2022-03-17T07:32:36 Z huangqr Event Hopping 2 (JOI21_event2) C++14
100 / 100
 559 ms 26204 KB 
#include<bits/stdc++.h>
using namespace std;
using ll = long long;
using pl = pair<ll,ll>;
using ppl = pair<pl,pl>;
const ll lim=5e5+5, b = 405;//b is the block size
ll nxt[lim], jumps[lim], out[lim], l;
set<pl>s;

ll journey(ll start){
	auto it=s.lower_bound(make_pair(start,-1ll));
	ll block = it->first;//block is the LAST position we CAN go
	assert(it->first>=block);
	ll ans = 0;
	ll pos = start;
	while(pos<=l&&out[pos]<=block){
		ans += jumps[pos] + 1;
		pos = out[pos];
	}
	while(pos<=l&&nxt[pos]<=block){
		ans ++;
		pos = nxt[pos];
	}
	//cout<<"start block:"<<start<<" "<<block<<" ans:"<<ans<<"\n";
	return ans;
}

int main(){
	ios_base::sync_with_stdio(0),cin.tie(0);
	ll n,k;
	cin>>n>>k;
	vector<ll>dsc;
	unordered_map<ll,ll>d;
	vector<pl>v;
	for(int i=0;i<n;i++){
		ll a,b;
		cin>>a>>b;
		v.emplace_back(a,b);
		dsc.push_back(a);
		dsc.push_back(b);
	}
	sort(dsc.begin(),dsc.end());
	dsc.erase(unique(dsc.begin(),dsc.end()),dsc.end());
	for(int i=0;i<(int)dsc.size();i++)d[dsc[i]]=i+1;
	for(auto &p:v)p.first=d[p.first],p.second=d[p.second];
	l = dsc.size();
	
	
	fill(nxt,nxt+l+2,1e18);
	for(auto p:v)nxt[p.first]=min(nxt[p.first],p.second);
	for(int i=l;i>=1;i--)nxt[i]=min(nxt[i],nxt[i+1]);
	for(int i=1;i<=l;i+=b){
		int last = min(l,i+b-1);
		for(int j=last;j>=i;j--){
			if(nxt[j]>last){
				jumps[j]=0;
				out[j]=nxt[j];
			}
			else{
				jumps[j]=jumps[nxt[j]]+1;
				out[j]=out[nxt[j]];
			}
		}
	}
	s.emplace(0,1);
	s.emplace(l,l+1);
	ll cur = journey(1);
	if(cur<k){
		cout<<"-1\n";
		return 0;
	}
	vector<ll>ans;
	for(int i=0;i<n&&ans.size()<k;i++){
		auto it=s.lower_bound(make_pair(v[i].first,-1ll));
		if(it->first<v[i].second)continue;
		it--;
		if(it->second>v[i].first)continue;
		ll org_start =  it->second;
		ll org_this_seg = journey(org_start);
		s.insert(v[i]);
		ll new_this_seg = journey(org_start) + journey(v[i].second);
		assert(new_this_seg <= org_this_seg);
		//cout<<"cur: "<<cur<<" ots-nts:"<<
		if(cur - org_this_seg + new_this_seg + (s.size()-2) >=k){
			cur -= org_this_seg;
			cur += new_this_seg;
			ans.push_back(i+1);
		}
		else{
			s.erase(v[i]);
		}
	}
	for(auto x:ans)cout<<x<<"\n";
	
	//for(int i=1;i<=l;i++)cout<<jumps[i]<<" ";
	//for(auto x:v)cout<<x.first<<" "<<x.second<<"\n";
	//cout<<"\n\n";
	
	
}

Compilation message

event2.cpp: In function 'int main()':
event2.cpp:73:29: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'll' {aka 'long long int'} [-Wsign-compare]
   73 |  for(int i=0;i<n&&ans.size()<k;i++){
      |                   ~~~~~~~~~~^~
event2.cpp:84:55: warning: comparison of integer expressions of different signedness: 'long long unsigned int' and 'll' {aka 'long long int'} [-Wsign-compare]
   84 |   if(cur - org_this_seg + new_this_seg + (s.size()-2) >=k){
      |      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 529 ms 24612 KB Output is correct
5 Correct 535 ms 25836 KB Output is correct
6 Correct 532 ms 25440 KB Output is correct
7 Correct 553 ms 24732 KB Output is correct
8 Correct 559 ms 26204 KB Output is correct
9 Correct 541 ms 25800 KB Output is correct
10 Correct 539 ms 25404 KB Output is correct
11 Correct 537 ms 24744 KB Output is correct
12 Correct 346 ms 23436 KB Output is correct
13 Correct 375 ms 23232 KB Output is correct
14 Correct 366 ms 22976 KB Output is correct
15 Correct 336 ms 22660 KB Output is correct
16 Correct 157 ms 20104 KB Output is correct
17 Correct 140 ms 19888 KB Output is correct
18 Correct 134 ms 19864 KB Output is correct
19 Correct 105 ms 19160 KB Output is correct
20 Correct 105 ms 19292 KB Output is correct
21 Correct 89 ms 19160 KB Output is correct
22 Correct 87 ms 19124 KB Output is correct
23 Correct 87 ms 19100 KB Output is correct
24 Correct 86 ms 19104 KB Output is correct
25 Correct 109 ms 19024 KB Output is correct
26 Correct 112 ms 19080 KB Output is correct
27 Correct 83 ms 19012 KB Output is correct
28 Correct 79 ms 19044 KB Output is correct
29 Correct 79 ms 19068 KB Output is correct
30 Correct 89 ms 19036 KB Output is correct
31 Correct 83 ms 19040 KB Output is correct
32 Correct 84 ms 18996 KB Output is correct
33 Correct 91 ms 19096 KB Output is correct
34 Correct 301 ms 21832 KB Output is correct
35 Correct 282 ms 20980 KB Output is correct
36 Correct 188 ms 19880 KB Output is correct
37 Correct 254 ms 22896 KB Output is correct
38 Correct 273 ms 22712 KB Output is correct
39 Correct 246 ms 22632 KB Output is correct
40 Correct 251 ms 22452 KB Output is correct
41 Correct 250 ms 22468 KB Output is correct
42 Correct 86 ms 19016 KB Output is correct
43 Correct 314 ms 22796 KB Output is correct
44 Correct 313 ms 22564 KB Output is correct
45 Correct 272 ms 22428 KB Output is correct
46 Correct 258 ms 22336 KB Output is correct

Subtask #2
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 328 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 328 KB Output is correct
9 Correct 1 ms 324 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 324 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 328 KB Output is correct
14 Correct 1 ms 328 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 0 ms 328 KB Output is correct
19 Correct 1 ms 328 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 332 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 0 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 1 ms 328 KB Output is correct
27 Correct 1 ms 340 KB Output is correct

Subtask #3
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 328 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 328 KB Output is correct
9 Correct 1 ms 324 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 324 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 328 KB Output is correct
14 Correct 1 ms 328 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 0 ms 328 KB Output is correct
19 Correct 1 ms 328 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 332 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 0 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 1 ms 328 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 3 ms 852 KB Output is correct
29 Correct 3 ms 848 KB Output is correct
30 Correct 2 ms 852 KB Output is correct
31 Correct 3 ms 816 KB Output is correct
32 Correct 2 ms 924 KB Output is correct
33 Correct 3 ms 924 KB Output is correct
34 Correct 2 ms 852 KB Output is correct
35 Correct 4 ms 1108 KB Output is correct
36 Correct 4 ms 1052 KB Output is correct
37 Correct 4 ms 980 KB Output is correct
38 Correct 3 ms 976 KB Output is correct
39 Correct 4 ms 1120 KB Output is correct
40 Correct 4 ms 980 KB Output is correct
41 Correct 4 ms 980 KB Output is correct
42 Correct 3 ms 852 KB Output is correct
43 Correct 3 ms 976 KB Output is correct
44 Correct 3 ms 980 KB Output is correct
45 Correct 3 ms 884 KB Output is correct
46 Correct 2 ms 852 KB Output is correct
47 Correct 3 ms 928 KB Output is correct
48 Correct 3 ms 928 KB Output is correct
49 Correct 3 ms 924 KB Output is correct
50 Correct 3 ms 924 KB Output is correct
51 Correct 3 ms 856 KB Output is correct
52 Correct 3 ms 852 KB Output is correct
53 Correct 4 ms 852 KB Output is correct
54 Correct 3 ms 852 KB Output is correct
55 Correct 4 ms 852 KB Output is correct
56 Correct 5 ms 852 KB Output is correct
57 Correct 5 ms 852 KB Output is correct
58 Correct 5 ms 924 KB Output is correct
59 Correct 5 ms 852 KB Output is correct
60 Correct 4 ms 852 KB Output is correct
61 Correct 4 ms 852 KB Output is correct
62 Correct 4 ms 852 KB Output is correct
63 Correct 4 ms 852 KB Output is correct
64 Correct 2 ms 596 KB Output is correct

Subtask #4
61.0 / 61.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 529 ms 24612 KB Output is correct
5 Correct 535 ms 25836 KB Output is correct
6 Correct 532 ms 25440 KB Output is correct
7 Correct 553 ms 24732 KB Output is correct
8 Correct 559 ms 26204 KB Output is correct
9 Correct 541 ms 25800 KB Output is correct
10 Correct 539 ms 25404 KB Output is correct
11 Correct 537 ms 24744 KB Output is correct
12 Correct 346 ms 23436 KB Output is correct
13 Correct 375 ms 23232 KB Output is correct
14 Correct 366 ms 22976 KB Output is correct
15 Correct 336 ms 22660 KB Output is correct
16 Correct 157 ms 20104 KB Output is correct
17 Correct 140 ms 19888 KB Output is correct
18 Correct 134 ms 19864 KB Output is correct
19 Correct 105 ms 19160 KB Output is correct
20 Correct 105 ms 19292 KB Output is correct
21 Correct 89 ms 19160 KB Output is correct
22 Correct 87 ms 19124 KB Output is correct
23 Correct 87 ms 19100 KB Output is correct
24 Correct 86 ms 19104 KB Output is correct
25 Correct 109 ms 19024 KB Output is correct
26 Correct 112 ms 19080 KB Output is correct
27 Correct 83 ms 19012 KB Output is correct
28 Correct 79 ms 19044 KB Output is correct
29 Correct 79 ms 19068 KB Output is correct
30 Correct 89 ms 19036 KB Output is correct
31 Correct 83 ms 19040 KB Output is correct
32 Correct 84 ms 18996 KB Output is correct
33 Correct 91 ms 19096 KB Output is correct
34 Correct 301 ms 21832 KB Output is correct
35 Correct 282 ms 20980 KB Output is correct
36 Correct 188 ms 19880 KB Output is correct
37 Correct 254 ms 22896 KB Output is correct
38 Correct 273 ms 22712 KB Output is correct
39 Correct 246 ms 22632 KB Output is correct
40 Correct 251 ms 22452 KB Output is correct
41 Correct 250 ms 22468 KB Output is correct
42 Correct 86 ms 19016 KB Output is correct
43 Correct 314 ms 22796 KB Output is correct
44 Correct 313 ms 22564 KB Output is correct
45 Correct 272 ms 22428 KB Output is correct
46 Correct 258 ms 22336 KB Output is correct
47 Correct 1 ms 340 KB Output is correct
48 Correct 1 ms 340 KB Output is correct
49 Correct 1 ms 328 KB Output is correct
50 Correct 1 ms 340 KB Output is correct
51 Correct 1 ms 340 KB Output is correct
52 Correct 1 ms 340 KB Output is correct
53 Correct 1 ms 340 KB Output is correct
54 Correct 1 ms 328 KB Output is correct
55 Correct 1 ms 324 KB Output is correct
56 Correct 1 ms 340 KB Output is correct
57 Correct 1 ms 324 KB Output is correct
58 Correct 1 ms 340 KB Output is correct
59 Correct 1 ms 328 KB Output is correct
60 Correct 1 ms 328 KB Output is correct
61 Correct 1 ms 340 KB Output is correct
62 Correct 1 ms 340 KB Output is correct
63 Correct 1 ms 340 KB Output is correct
64 Correct 0 ms 328 KB Output is correct
65 Correct 1 ms 328 KB Output is correct
66 Correct 1 ms 340 KB Output is correct
67 Correct 1 ms 332 KB Output is correct
68 Correct 1 ms 340 KB Output is correct
69 Correct 0 ms 340 KB Output is correct
70 Correct 1 ms 340 KB Output is correct
71 Correct 1 ms 340 KB Output is correct
72 Correct 1 ms 328 KB Output is correct
73 Correct 1 ms 340 KB Output is correct
74 Correct 3 ms 852 KB Output is correct
75 Correct 3 ms 848 KB Output is correct
76 Correct 2 ms 852 KB Output is correct
77 Correct 3 ms 816 KB Output is correct
78 Correct 2 ms 924 KB Output is correct
79 Correct 3 ms 924 KB Output is correct
80 Correct 2 ms 852 KB Output is correct
81 Correct 4 ms 1108 KB Output is correct
82 Correct 4 ms 1052 KB Output is correct
83 Correct 4 ms 980 KB Output is correct
84 Correct 3 ms 976 KB Output is correct
85 Correct 4 ms 1120 KB Output is correct
86 Correct 4 ms 980 KB Output is correct
87 Correct 4 ms 980 KB Output is correct
88 Correct 3 ms 852 KB Output is correct
89 Correct 3 ms 976 KB Output is correct
90 Correct 3 ms 980 KB Output is correct
91 Correct 3 ms 884 KB Output is correct
92 Correct 2 ms 852 KB Output is correct
93 Correct 3 ms 928 KB Output is correct
94 Correct 3 ms 928 KB Output is correct
95 Correct 3 ms 924 KB Output is correct
96 Correct 3 ms 924 KB Output is correct
97 Correct 3 ms 856 KB Output is correct
98 Correct 3 ms 852 KB Output is correct
99 Correct 4 ms 852 KB Output is correct
100 Correct 3 ms 852 KB Output is correct
101 Correct 4 ms 852 KB Output is correct
102 Correct 5 ms 852 KB Output is correct
103 Correct 5 ms 852 KB Output is correct
104 Correct 5 ms 924 KB Output is correct
105 Correct 5 ms 852 KB Output is correct
106 Correct 4 ms 852 KB Output is correct
107 Correct 4 ms 852 KB Output is correct
108 Correct 4 ms 852 KB Output is correct
109 Correct 4 ms 852 KB Output is correct
110 Correct 2 ms 596 KB Output is correct
111 Correct 99 ms 19148 KB Output is correct
112 Correct 104 ms 19152 KB Output is correct
113 Correct 92 ms 19044 KB Output is correct
114 Correct 92 ms 19040 KB Output is correct
115 Correct 94 ms 19020 KB Output is correct
116 Correct 92 ms 19204 KB Output is correct
117 Correct 90 ms 19120 KB Output is correct
118 Correct 179 ms 26108 KB Output is correct
119 Correct 169 ms 25440 KB Output is correct
120 Correct 129 ms 22532 KB Output is correct
121 Correct 88 ms 19040 KB Output is correct
122 Correct 162 ms 23488 KB Output is correct
123 Correct 141 ms 22996 KB Output is correct
124 Correct 128 ms 22592 KB Output is correct
125 Correct 88 ms 19036 KB Output is correct
126 Correct 115 ms 20020 KB Output is correct
127 Correct 139 ms 20048 KB Output is correct
128 Correct 109 ms 19844 KB Output is correct
129 Correct 92 ms 19072 KB Output is correct
130 Correct 111 ms 19156 KB Output is correct
131 Correct 104 ms 19216 KB Output is correct
132 Correct 98 ms 19196 KB Output is correct
133 Correct 99 ms 19100 KB Output is correct
134 Correct 99 ms 19060 KB Output is correct
135 Correct 97 ms 19032 KB Output is correct
136 Correct 95 ms 19024 KB Output is correct
137 Correct 92 ms 19096 KB Output is correct
138 Correct 93 ms 19024 KB Output is correct
139 Correct 92 ms 19128 KB Output is correct
140 Correct 110 ms 19172 KB Output is correct
141 Correct 93 ms 19096 KB Output is correct
142 Correct 317 ms 19884 KB Output is correct
143 Correct 326 ms 19880 KB Output is correct
144 Correct 330 ms 19796 KB Output is correct
145 Correct 236 ms 19756 KB Output is correct
146 Correct 226 ms 19704 KB Output is correct
147 Correct 228 ms 19456 KB Output is correct
148 Correct 227 ms 19380 KB Output is correct
149 Correct 224 ms 19176 KB Output is correct
150 Correct 222 ms 19140 KB Output is correct
151 Correct 211 ms 18244 KB Output is correct
152 Correct 45 ms 12428 KB Output is correct
153 Correct 206 ms 19984 KB Output is correct
154 Correct 188 ms 19620 KB Output is correct
155 Correct 215 ms 19556 KB Output is correct
156 Correct 183 ms 19536 KB Output is correct
157 Correct 187 ms 19180 KB Output is correct
158 Correct 190 ms 19112 KB Output is correct
159 Correct 191 ms 18280 KB Output is correct
160 Correct 46 ms 12372 KB Output is correct
161 Correct 123 ms 18732 KB Output is correct
162 Correct 115 ms 18536 KB Output is correct
163 Correct 135 ms 18408 KB Output is correct
164 Correct 138 ms 18256 KB Output is correct
165 Correct 118 ms 18112 KB Output is correct
166 Correct 107 ms 19004 KB Output is correct
167 Correct 347 ms 22712 KB Output is correct
168 Correct 347 ms 22600 KB Output is correct
169 Correct 279 ms 22488 KB Output is correct
170 Correct 266 ms 22276 KB Output is correct
171 Correct 221 ms 22324 KB Output is correct
172 Correct 225 ms 22868 KB Output is correct
173 Correct 120 ms 15952 KB Output is correct
174 Correct 116 ms 16020 KB Output is correct
175 Correct 113 ms 16100 KB Output is correct
176 Correct 97 ms 15260 KB Output is correct