Submission #488113

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
488113	2021-11-17T18:14:20 Z	MohamedAhmed04	Love Polygon (BOI18_polygon)	C++14	100 / 100	273 ms	12604 KB

polygon

#include <bits/stdc++.h>

using namespace std ;

const int MAX = 1e5 + 10 ;

int arr[MAX] ;
int n ;

string s1 , s2 ;

map<string , int>mp ;

int id = 0 ;

int indeg[MAX] , to[MAX] ;
int match[MAX] ;

int main()
{
	ios_base::sync_with_stdio(0) ;
	cin.tie(0) ;
	cin>>n ;
	for(int i = 1 ; i <= n ; ++i)
	{
		cin>>s1>>s2 ;
		if(mp.find(s1) == mp.end())
			mp[s1] = ++id ;
		if(mp.find(s2) == mp.end())
			mp[s2] = ++id ;
		if(s2 != s1)
			indeg[mp[s2]]++ ;
		to[mp[s1]] = mp[s2] ;
	}
	if(n&1)
		return cout<<-1<<"\n" , 0 ;
	priority_queue< pair<int , int> , vector< pair<int , int> > , greater< pair<int , int> > >q ;
	for(int i = 1 ; i <= n ; ++i)
	{
		q.push({indeg[i] , i}) ;
		if(to[i] != i && to[to[i]] == i)
			match[i] = 1 , match[to[i]] = 1 ;
	}
	int ans = 0 ;
	while(!q.empty())
	{
		pair<int , int>p = q.top() ;
		q.pop() ;
		int node = p.second ;
		if(match[node])
			continue ;
		ans++ ;
		match[node] = 1 ;
		int x = to[node] ;
		if(match[x])
			continue ;
		match[x] = 1 ;
		indeg[to[x]]-- ;
		q.push({indeg[to[x]] , to[x]}) ;
	}
	return cout<<ans<<"\n" , 0 ;
}

Subtask #1
21.0 / 21.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	336 KB	Output is correct
2	Correct	0 ms	336 KB	Output is correct
3	Correct	0 ms	324 KB	Output is correct
4	Correct	1 ms	208 KB	Output is correct
5	Correct	1 ms	336 KB	Output is correct
6	Correct	1 ms	332 KB	Output is correct
7	Correct	1 ms	336 KB	Output is correct
8	Correct	1 ms	336 KB	Output is correct
9	Correct	0 ms	336 KB	Output is correct
10	Correct	0 ms	336 KB	Output is correct
11	Correct	0 ms	336 KB	Output is correct
12	Correct	1 ms	208 KB	Output is correct
13	Correct	1 ms	336 KB	Output is correct
14	Correct	0 ms	336 KB	Output is correct
15	Correct	0 ms	208 KB	Output is correct

Subtask #2
25.0 / 25.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	208 KB	Output is correct
2	Correct	1 ms	336 KB	Output is correct
3	Correct	0 ms	208 KB	Output is correct
4	Correct	207 ms	12380 KB	Output is correct
5	Correct	199 ms	12480 KB	Output is correct
6	Correct	251 ms	12388 KB	Output is correct
7	Correct	230 ms	10952 KB	Output is correct

Subtask #3
29.0 / 29.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	204 ms	12352 KB	Output is correct
2	Correct	252 ms	12464 KB	Output is correct
3	Correct	147 ms	11960 KB	Output is correct
4	Correct	176 ms	10980 KB	Output is correct
5	Correct	263 ms	12312 KB	Output is correct
6	Correct	202 ms	12368 KB	Output is correct
7	Correct	207 ms	12332 KB	Output is correct
8	Correct	205 ms	12448 KB	Output is correct
9	Correct	198 ms	12384 KB	Output is correct
10	Correct	151 ms	11968 KB	Output is correct
11	Correct	0 ms	336 KB	Output is correct
12	Correct	0 ms	208 KB	Output is correct
13	Correct	0 ms	208 KB	Output is correct
14	Correct	0 ms	336 KB	Output is correct

Subtask #4
25.0 / 25.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	336 KB	Output is correct
2	Correct	0 ms	336 KB	Output is correct
3	Correct	0 ms	324 KB	Output is correct
4	Correct	1 ms	208 KB	Output is correct
5	Correct	1 ms	336 KB	Output is correct
6	Correct	1 ms	332 KB	Output is correct
7	Correct	1 ms	336 KB	Output is correct
8	Correct	1 ms	336 KB	Output is correct
9	Correct	0 ms	336 KB	Output is correct
10	Correct	0 ms	336 KB	Output is correct
11	Correct	0 ms	336 KB	Output is correct
12	Correct	1 ms	208 KB	Output is correct
13	Correct	1 ms	336 KB	Output is correct
14	Correct	0 ms	336 KB	Output is correct
15	Correct	0 ms	208 KB	Output is correct
16	Correct	0 ms	208 KB	Output is correct
17	Correct	1 ms	336 KB	Output is correct
18	Correct	0 ms	208 KB	Output is correct
19	Correct	207 ms	12380 KB	Output is correct
20	Correct	199 ms	12480 KB	Output is correct
21	Correct	251 ms	12388 KB	Output is correct
22	Correct	230 ms	10952 KB	Output is correct
23	Correct	204 ms	12352 KB	Output is correct
24	Correct	252 ms	12464 KB	Output is correct
25	Correct	147 ms	11960 KB	Output is correct
26	Correct	176 ms	10980 KB	Output is correct
27	Correct	263 ms	12312 KB	Output is correct
28	Correct	202 ms	12368 KB	Output is correct
29	Correct	207 ms	12332 KB	Output is correct
30	Correct	205 ms	12448 KB	Output is correct
31	Correct	198 ms	12384 KB	Output is correct
32	Correct	151 ms	11968 KB	Output is correct
33	Correct	0 ms	336 KB	Output is correct
34	Correct	0 ms	208 KB	Output is correct
35	Correct	0 ms	208 KB	Output is correct
36	Correct	0 ms	336 KB	Output is correct
37	Correct	229 ms	12280 KB	Output is correct
38	Correct	273 ms	12312 KB	Output is correct
39	Correct	212 ms	12604 KB	Output is correct
40	Correct	215 ms	12292 KB	Output is correct
41	Correct	223 ms	12384 KB	Output is correct
42	Correct	200 ms	12324 KB	Output is correct
43	Correct	222 ms	12332 KB	Output is correct
44	Correct	217 ms	12296 KB	Output is correct
45	Correct	201 ms	12356 KB	Output is correct
46	Correct	241 ms	12360 KB	Output is correct
47	Correct	185 ms	12336 KB	Output is correct
48	Correct	246 ms	12368 KB	Output is correct
49	Correct	210 ms	12336 KB	Output is correct
50	Correct	161 ms	11928 KB	Output is correct
51	Correct	201 ms	10976 KB	Output is correct
52	Correct	200 ms	12356 KB	Output is correct
53	Correct	213 ms	12368 KB	Output is correct
54	Correct	212 ms	12284 KB	Output is correct
55	Correct	184 ms	12376 KB	Output is correct
56	Correct	226 ms	12300 KB	Output is correct
57	Correct	146 ms	11952 KB	Output is correct
58	Correct	0 ms	336 KB	Output is correct
59	Correct	0 ms	208 KB	Output is correct
60	Correct	0 ms	336 KB	Output is correct
61	Correct	0 ms	332 KB	Output is correct
62	Correct	0 ms	208 KB	Output is correct
63	Correct	0 ms	336 KB	Output is correct
64	Correct	0 ms	336 KB	Output is correct
65	Correct	256 ms	12292 KB	Output is correct
66	Correct	209 ms	12396 KB	Output is correct
67	Correct	203 ms	12356 KB	Output is correct
68	Correct	206 ms	10956 KB	Output is correct
69	Correct	0 ms	328 KB	Output is correct
70	Correct	0 ms	336 KB	Output is correct
71	Correct	0 ms	336 KB	Output is correct
72	Correct	0 ms	336 KB	Output is correct
73	Correct	0 ms	208 KB	Output is correct
74	Correct	0 ms	336 KB	Output is correct
75	Correct	0 ms	336 KB	Output is correct
76	Correct	0 ms	336 KB	Output is correct
77	Correct	0 ms	336 KB	Output is correct
78	Correct	1 ms	336 KB	Output is correct
79	Correct	1 ms	336 KB	Output is correct
80	Correct	0 ms	208 KB	Output is correct
81	Correct	0 ms	208 KB	Output is correct
82	Correct	0 ms	336 KB	Output is correct
83	Correct	0 ms	336 KB	Output is correct

Submission #488113

Compilation message

Subtask #1 21.0 / 21.0

Subtask #2 25.0 / 25.0

Subtask #3 29.0 / 29.0

Subtask #4 25.0 / 25.0

Subtask #1
21.0 / 21.0

Subtask #2
25.0 / 25.0

Subtask #3
29.0 / 29.0

Subtask #4
25.0 / 25.0