Submission #373660

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
373660	2021-03-05T11:33:04 Z	LucaDantas	Love Polygon (BOI18_polygon)	C++17	100 / 100	379 ms	11628 KB

polygon

#include<bits/stdc++.h>
using namespace std;

constexpr int maxn = 1e5+10;

int deg[maxn], f[maxn], cnt;

bool mark[maxn];

map<string, int> mp;

int main() {
	ios_base::sync_with_stdio(false); cin.tie(NULL);
	memset(f, -1, sizeof f);
	int n, ans = 0; cin >> n;
	for(int i = 0; i < n; i++) {
		string s, p; cin >> s >> p;
		if(!mp.count(s)) mp[s] = ++cnt;
		if(!mp.count(p)) mp[p] = ++cnt;
		f[mp[s]] = mp[p];
		++deg[mp[p]];
		if(f[mp[p]] == mp[s] && s != p)
			mark[mp[p]] = mark[mp[s]] = 1; // ja tao no par
	}
	queue<int> q;
	for(int i = 1; i <= n; i++)
		if(!deg[i]) q.push(i);
	while(q.size()) {
		int u = q.front(); q.pop();
		if(mark[u] || mark[f[u]]) continue;
		++ans;
		mark[u] = 1;
		mark[f[u]] = 1;
		--deg[f[u]];
		if(f[u] == f[f[u]]) continue;
		if(!mark[f[f[u]]] && !(--deg[f[f[u]]]))
			q.push(f[f[u]]);
	}
	for(int i = 1; i <= n; i++) {
		if(mark[i]) continue;
		mark[i] = 1;
		int sz = 1, u = f[i];
		while(!mark[u]) ++sz, mark[u] = 1, u = f[u];
		ans += (sz+1)>>1;
	}
	printf("%d\n", n%2?-1:ans);
}

Subtask #1
21.0 / 21.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	748 KB	Output is correct
2	Correct	1 ms	748 KB	Output is correct
3	Correct	1 ms	748 KB	Output is correct
4	Correct	1 ms	748 KB	Output is correct
5	Correct	1 ms	748 KB	Output is correct
6	Correct	1 ms	748 KB	Output is correct
7	Correct	1 ms	748 KB	Output is correct
8	Correct	1 ms	748 KB	Output is correct
9	Correct	1 ms	748 KB	Output is correct
10	Correct	1 ms	748 KB	Output is correct
11	Correct	1 ms	748 KB	Output is correct
12	Correct	1 ms	748 KB	Output is correct
13	Correct	0 ms	748 KB	Output is correct
14	Correct	1 ms	748 KB	Output is correct
15	Correct	1 ms	748 KB	Output is correct

Subtask #2
25.0 / 25.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	908 KB	Output is correct
2	Correct	1 ms	768 KB	Output is correct
3	Correct	1 ms	796 KB	Output is correct
4	Correct	371 ms	11396 KB	Output is correct
5	Correct	369 ms	11372 KB	Output is correct
6	Correct	370 ms	11292 KB	Output is correct
7	Correct	369 ms	11244 KB	Output is correct

Subtask #3
29.0 / 29.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	355 ms	11396 KB	Output is correct
2	Correct	379 ms	11416 KB	Output is correct
3	Correct	342 ms	11224 KB	Output is correct
4	Correct	375 ms	11372 KB	Output is correct
5	Correct	347 ms	11244 KB	Output is correct
6	Correct	336 ms	11372 KB	Output is correct
7	Correct	339 ms	11372 KB	Output is correct
8	Correct	315 ms	11500 KB	Output is correct
9	Correct	342 ms	11500 KB	Output is correct
10	Correct	256 ms	11372 KB	Output is correct
11	Correct	1 ms	748 KB	Output is correct
12	Correct	1 ms	748 KB	Output is correct
13	Correct	1 ms	748 KB	Output is correct
14	Correct	1 ms	748 KB	Output is correct

Subtask #4
25.0 / 25.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	748 KB	Output is correct
2	Correct	1 ms	748 KB	Output is correct
3	Correct	1 ms	748 KB	Output is correct
4	Correct	1 ms	748 KB	Output is correct
5	Correct	1 ms	748 KB	Output is correct
6	Correct	1 ms	748 KB	Output is correct
7	Correct	1 ms	748 KB	Output is correct
8	Correct	1 ms	748 KB	Output is correct
9	Correct	1 ms	748 KB	Output is correct
10	Correct	1 ms	748 KB	Output is correct
11	Correct	1 ms	748 KB	Output is correct
12	Correct	1 ms	748 KB	Output is correct
13	Correct	0 ms	748 KB	Output is correct
14	Correct	1 ms	748 KB	Output is correct
15	Correct	1 ms	748 KB	Output is correct
16	Correct	1 ms	908 KB	Output is correct
17	Correct	1 ms	768 KB	Output is correct
18	Correct	1 ms	796 KB	Output is correct
19	Correct	371 ms	11396 KB	Output is correct
20	Correct	369 ms	11372 KB	Output is correct
21	Correct	370 ms	11292 KB	Output is correct
22	Correct	369 ms	11244 KB	Output is correct
23	Correct	355 ms	11396 KB	Output is correct
24	Correct	379 ms	11416 KB	Output is correct
25	Correct	342 ms	11224 KB	Output is correct
26	Correct	375 ms	11372 KB	Output is correct
27	Correct	347 ms	11244 KB	Output is correct
28	Correct	336 ms	11372 KB	Output is correct
29	Correct	339 ms	11372 KB	Output is correct
30	Correct	315 ms	11500 KB	Output is correct
31	Correct	342 ms	11500 KB	Output is correct
32	Correct	256 ms	11372 KB	Output is correct
33	Correct	1 ms	748 KB	Output is correct
34	Correct	1 ms	748 KB	Output is correct
35	Correct	1 ms	748 KB	Output is correct
36	Correct	1 ms	748 KB	Output is correct
37	Correct	354 ms	11244 KB	Output is correct
38	Correct	348 ms	11372 KB	Output is correct
39	Correct	350 ms	11372 KB	Output is correct
40	Correct	333 ms	11524 KB	Output is correct
41	Correct	356 ms	11456 KB	Output is correct
42	Correct	340 ms	11500 KB	Output is correct
43	Correct	345 ms	11372 KB	Output is correct
44	Correct	358 ms	11500 KB	Output is correct
45	Correct	347 ms	11500 KB	Output is correct
46	Correct	350 ms	11500 KB	Output is correct
47	Correct	320 ms	11500 KB	Output is correct
48	Correct	358 ms	11372 KB	Output is correct
49	Correct	340 ms	11244 KB	Output is correct
50	Correct	285 ms	11244 KB	Output is correct
51	Correct	347 ms	11500 KB	Output is correct
52	Correct	353 ms	11244 KB	Output is correct
53	Correct	344 ms	11516 KB	Output is correct
54	Correct	347 ms	11500 KB	Output is correct
55	Correct	321 ms	11372 KB	Output is correct
56	Correct	320 ms	11628 KB	Output is correct
57	Correct	257 ms	11372 KB	Output is correct
58	Correct	1 ms	748 KB	Output is correct
59	Correct	1 ms	748 KB	Output is correct
60	Correct	1 ms	748 KB	Output is correct
61	Correct	1 ms	748 KB	Output is correct
62	Correct	1 ms	748 KB	Output is correct
63	Correct	1 ms	748 KB	Output is correct
64	Correct	1 ms	748 KB	Output is correct
65	Correct	351 ms	11244 KB	Output is correct
66	Correct	373 ms	11432 KB	Output is correct
67	Correct	342 ms	11240 KB	Output is correct
68	Correct	350 ms	11372 KB	Output is correct
69	Correct	1 ms	748 KB	Output is correct
70	Correct	1 ms	748 KB	Output is correct
71	Correct	1 ms	748 KB	Output is correct
72	Correct	1 ms	748 KB	Output is correct
73	Correct	1 ms	748 KB	Output is correct
74	Correct	1 ms	748 KB	Output is correct
75	Correct	1 ms	748 KB	Output is correct
76	Correct	1 ms	748 KB	Output is correct
77	Correct	1 ms	748 KB	Output is correct
78	Correct	1 ms	748 KB	Output is correct
79	Correct	1 ms	748 KB	Output is correct
80	Correct	1 ms	748 KB	Output is correct
81	Correct	1 ms	748 KB	Output is correct
82	Correct	1 ms	748 KB	Output is correct
83	Correct	1 ms	748 KB	Output is correct

Submission #373660

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