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Submission #748458

# Submission time Handle Problem Language Result Execution time Memory
748458 2023-05-26T10:09:39 Z mariowong Love Polygon (BOI18_polygon) C++14
100 / 100
 449 ms 17160 KB 
#include <bits/stdc++.h>
using namespace std;
 
map <string,pair<string,int>  > love;
string s[100005];
int in[100005];
bool ok[100005];
int main(){
    ios::sync_with_stdio(false);
    int n;	
    cin >> n;
    for (int i=1;i<=n;i++){
    	string t;
    	cin >> s[i] >> t;
    	love[s[i]]={t,i};
    }
    for (int i=1;i<=n;i++){
    	if (love[love[s[i]].first].first == s[i] && s[i] != love[s[i]].first) ok[i]=ok[love[love[s[i]].first].second]=true;
    	else in[love[love[s[i]].first].second]++;
    }
	int ans=0;
	for (int i=1;i<=n;i++){
		if (in[i] == 0 && !ok[i] && !ok[love[love[s[i]].first].second]){
			ans++,ok[i]=ok[love[love[s[i]].first].second]=true; 
			string now=love[love[s[i]].first].first;	
			in[love[now].second]--;
			while (in[love[now].second] == 0){
				if (now != love[now].first && !ok[love[now].second] && !ok[love[love[now].first].second]){
					ok[love[now].second]=ok[love[love[now].first].second]=true;
					ans++;
					now=love[love[now].first].first;
					in[love[now].second]--;
				}
				else
				break;
			}
		}
	}
	for (int i=1;i<=n;i++){
		if (s[i] != love[s[i]].first && !ok[i] && !ok[love[love[s[i]].first].second]){
			ans++,ok[i]=ok[love[love[s[i]].first].second]=true; 	
			string now=love[love[s[i]].first].first;
			in[love[now].second]--;
			while (in[love[now].second] == 0){
				if (now != love[now].first && !ok[love[now].second] && !ok[love[love[now].first].second]){
					ok[love[now].second]=ok[love[love[now].first].second]=true;
					ans++;
					now=love[love[now].first].first;
					in[love[now].second]--;
				}
				else
				break;
			}
		}
	}
	for (int i=1;i<=n;i++){
		if (!ok[i]) ans++;	
	}
    if (n%2 == 1) cout << "-1\n";
    else cout << ans << "\n";
	return 0;
}

Subtask #1
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 3412 KB Output is correct
2 Correct 2 ms 3464 KB Output is correct
3 Correct 2 ms 3412 KB Output is correct
4 Correct 2 ms 3460 KB Output is correct
5 Correct 2 ms 3380 KB Output is correct
6 Correct 2 ms 3412 KB Output is correct
7 Correct 2 ms 3412 KB Output is correct
8 Correct 2 ms 3412 KB Output is correct
9 Correct 2 ms 3412 KB Output is correct
10 Correct 2 ms 3412 KB Output is correct
11 Correct 2 ms 3412 KB Output is correct
12 Correct 2 ms 3412 KB Output is correct
13 Correct 2 ms 3412 KB Output is correct
14 Correct 2 ms 3412 KB Output is correct
15 Correct 2 ms 3412 KB Output is correct

Subtask #2
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 3412 KB Output is correct
2 Correct 2 ms 3464 KB Output is correct
3 Correct 2 ms 3412 KB Output is correct
4 Correct 428 ms 17048 KB Output is correct
5 Correct 391 ms 17100 KB Output is correct
6 Correct 414 ms 17136 KB Output is correct
7 Correct 427 ms 17036 KB Output is correct

Subtask #3
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 398 ms 17044 KB Output is correct
2 Correct 387 ms 16976 KB Output is correct
3 Correct 247 ms 16924 KB Output is correct
4 Correct 394 ms 17020 KB Output is correct
5 Correct 410 ms 16972 KB Output is correct
6 Correct 409 ms 17072 KB Output is correct
7 Correct 381 ms 17100 KB Output is correct
8 Correct 342 ms 17100 KB Output is correct
9 Correct 356 ms 17160 KB Output is correct
10 Correct 325 ms 16560 KB Output is correct
11 Correct 2 ms 3412 KB Output is correct
12 Correct 2 ms 3464 KB Output is correct
13 Correct 2 ms 3412 KB Output is correct
14 Correct 2 ms 3412 KB Output is correct

Subtask #4
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 3412 KB Output is correct
2 Correct 2 ms 3464 KB Output is correct
3 Correct 2 ms 3412 KB Output is correct
4 Correct 2 ms 3460 KB Output is correct
5 Correct 2 ms 3380 KB Output is correct
6 Correct 2 ms 3412 KB Output is correct
7 Correct 2 ms 3412 KB Output is correct
8 Correct 2 ms 3412 KB Output is correct
9 Correct 2 ms 3412 KB Output is correct
10 Correct 2 ms 3412 KB Output is correct
11 Correct 2 ms 3412 KB Output is correct
12 Correct 2 ms 3412 KB Output is correct
13 Correct 2 ms 3412 KB Output is correct
14 Correct 2 ms 3412 KB Output is correct
15 Correct 2 ms 3412 KB Output is correct
16 Correct 2 ms 3412 KB Output is correct
17 Correct 2 ms 3464 KB Output is correct
18 Correct 2 ms 3412 KB Output is correct
19 Correct 428 ms 17048 KB Output is correct
20 Correct 391 ms 17100 KB Output is correct
21 Correct 414 ms 17136 KB Output is correct
22 Correct 427 ms 17036 KB Output is correct
23 Correct 398 ms 17044 KB Output is correct
24 Correct 387 ms 16976 KB Output is correct
25 Correct 247 ms 16924 KB Output is correct
26 Correct 394 ms 17020 KB Output is correct
27 Correct 410 ms 16972 KB Output is correct
28 Correct 409 ms 17072 KB Output is correct
29 Correct 381 ms 17100 KB Output is correct
30 Correct 342 ms 17100 KB Output is correct
31 Correct 356 ms 17160 KB Output is correct
32 Correct 325 ms 16560 KB Output is correct
33 Correct 2 ms 3412 KB Output is correct
34 Correct 2 ms 3464 KB Output is correct
35 Correct 2 ms 3412 KB Output is correct
36 Correct 2 ms 3412 KB Output is correct
37 Correct 449 ms 17040 KB Output is correct
38 Correct 392 ms 17072 KB Output is correct
39 Correct 398 ms 17116 KB Output is correct
40 Correct 394 ms 16984 KB Output is correct
41 Correct 403 ms 17032 KB Output is correct
42 Correct 408 ms 16928 KB Output is correct
43 Correct 390 ms 17020 KB Output is correct
44 Correct 408 ms 17036 KB Output is correct
45 Correct 379 ms 17100 KB Output is correct
46 Correct 413 ms 17140 KB Output is correct
47 Correct 371 ms 17072 KB Output is correct
48 Correct 385 ms 16976 KB Output is correct
49 Correct 412 ms 17128 KB Output is correct
50 Correct 241 ms 16896 KB Output is correct
51 Correct 381 ms 17040 KB Output is correct
52 Correct 401 ms 16968 KB Output is correct
53 Correct 407 ms 17040 KB Output is correct
54 Correct 400 ms 16944 KB Output is correct
55 Correct 352 ms 16976 KB Output is correct
56 Correct 399 ms 17112 KB Output is correct
57 Correct 318 ms 16568 KB Output is correct
58 Correct 2 ms 3412 KB Output is correct
59 Correct 2 ms 3540 KB Output is correct
60 Correct 2 ms 3412 KB Output is correct
61 Correct 2 ms 3412 KB Output is correct
62 Correct 2 ms 3412 KB Output is correct
63 Correct 2 ms 3412 KB Output is correct
64 Correct 2 ms 3412 KB Output is correct
65 Correct 376 ms 17008 KB Output is correct
66 Correct 404 ms 17036 KB Output is correct
67 Correct 408 ms 17044 KB Output is correct
68 Correct 415 ms 16972 KB Output is correct
69 Correct 2 ms 3412 KB Output is correct
70 Correct 2 ms 3412 KB Output is correct
71 Correct 2 ms 3412 KB Output is correct
72 Correct 2 ms 3412 KB Output is correct
73 Correct 2 ms 3412 KB Output is correct
74 Correct 2 ms 3412 KB Output is correct
75 Correct 2 ms 3412 KB Output is correct
76 Correct 2 ms 3412 KB Output is correct
77 Correct 2 ms 3412 KB Output is correct
78 Correct 2 ms 3412 KB Output is correct
79 Correct 2 ms 3412 KB Output is correct
80 Correct 2 ms 3412 KB Output is correct
81 Correct 2 ms 3412 KB Output is correct
82 Correct 2 ms 3464 KB Output is correct
83 Correct 2 ms 3412 KB Output is correct