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Submission #1005648

# Submission time Handle Problem Language Result Execution time Memory
1005648 2024-06-22T17:14:04 Z LonlyR Love Polygon (BOI18_polygon) C++17
100 / 100
 227 ms 16848 KB 
#include <bits/stdc++.h>

using namespace std;

int main(){
	cin.tie(0); ios::sync_with_stdio(0);
	int n, c = 0, sol = 0;
	cin >> n;
	if(n&1){
		cout << "-1\n";
		exit(0);
	}
	vector<int> love(n), deg(n), s, active(n, 1);
	map<string,int> dns;
	set<int> single;
	for(int i = 0; i < n; i++){
		single.insert(i);
		string a, b;
		cin >> a >> b;
		if(!dns.count(a)) dns[a] = c++;
		if(!dns.count(b)) dns[b] = c++;
		love[dns[a]] = dns[b];
		deg[dns[b]]++;
	}
	for(int i = 0; i < n; i++) if(deg[i] == 0) s.push_back(i);
	int i = 0;
	for(int j = 0; j < n; j++){
		if(active[j] && love[love[j]] == j && love[j] != j){
			active[j] = 0, active[love[j]] = 0;
			single.erase(j), single.erase(love[j]);
			i += 2;
		}
	}
	for(; i < n; i++){
		if(s.empty()) s.push_back(*single.begin());
		int u = s.back();
		s.pop_back();
		active[u] = 0;
		single.erase(u);
		sol++;
		if(active[love[u]]){
			i++;
			active[love[u]] = 0;
			single.erase(love[u]);
			if(active[love[love[u]]] && !--deg[love[love[u]]]) s.push_back(love[love[u]]);
			if(love[love[u]] == u) sol--, cout << "WHAT\n";
		}
	}
	cout << sol << "\n";
}

Subtask #1
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct

Subtask #2
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 186 ms 16236 KB Output is correct
5 Correct 190 ms 16064 KB Output is correct
6 Correct 211 ms 16208 KB Output is correct
7 Correct 0 ms 348 KB Output is correct

Subtask #3
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 182 ms 16468 KB Output is correct
2 Correct 189 ms 16416 KB Output is correct
3 Correct 159 ms 16212 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 214 ms 16216 KB Output is correct
6 Correct 212 ms 16604 KB Output is correct
7 Correct 211 ms 16568 KB Output is correct
8 Correct 189 ms 16464 KB Output is correct
9 Correct 197 ms 16708 KB Output is correct
10 Correct 144 ms 16844 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct

Subtask #4
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 344 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 186 ms 16236 KB Output is correct
20 Correct 190 ms 16064 KB Output is correct
21 Correct 211 ms 16208 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 182 ms 16468 KB Output is correct
24 Correct 189 ms 16416 KB Output is correct
25 Correct 159 ms 16212 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 214 ms 16216 KB Output is correct
28 Correct 212 ms 16604 KB Output is correct
29 Correct 211 ms 16568 KB Output is correct
30 Correct 189 ms 16464 KB Output is correct
31 Correct 197 ms 16708 KB Output is correct
32 Correct 144 ms 16844 KB Output is correct
33 Correct 1 ms 348 KB Output is correct
34 Correct 1 ms 348 KB Output is correct
35 Correct 1 ms 348 KB Output is correct
36 Correct 0 ms 348 KB Output is correct
37 Correct 227 ms 16208 KB Output is correct
38 Correct 198 ms 16668 KB Output is correct
39 Correct 206 ms 16592 KB Output is correct
40 Correct 205 ms 16592 KB Output is correct
41 Correct 164 ms 16592 KB Output is correct
42 Correct 173 ms 16464 KB Output is correct
43 Correct 190 ms 16584 KB Output is correct
44 Correct 204 ms 16468 KB Output is correct
45 Correct 182 ms 16620 KB Output is correct
46 Correct 215 ms 16636 KB Output is correct
47 Correct 165 ms 16844 KB Output is correct
48 Correct 177 ms 16468 KB Output is correct
49 Correct 193 ms 16212 KB Output is correct
50 Correct 164 ms 16208 KB Output is correct
51 Correct 0 ms 348 KB Output is correct
52 Correct 201 ms 16212 KB Output is correct
53 Correct 187 ms 16564 KB Output is correct
54 Correct 195 ms 16552 KB Output is correct
55 Correct 156 ms 16464 KB Output is correct
56 Correct 165 ms 16700 KB Output is correct
57 Correct 144 ms 16848 KB Output is correct
58 Correct 1 ms 344 KB Output is correct
59 Correct 0 ms 348 KB Output is correct
60 Correct 0 ms 348 KB Output is correct
61 Correct 1 ms 348 KB Output is correct
62 Correct 0 ms 348 KB Output is correct
63 Correct 0 ms 348 KB Output is correct
64 Correct 0 ms 348 KB Output is correct
65 Correct 189 ms 16256 KB Output is correct
66 Correct 188 ms 16212 KB Output is correct
67 Correct 194 ms 16212 KB Output is correct
68 Correct 1 ms 348 KB Output is correct
69 Correct 0 ms 348 KB Output is correct
70 Correct 0 ms 344 KB Output is correct
71 Correct 0 ms 344 KB Output is correct
72 Correct 1 ms 600 KB Output is correct
73 Correct 0 ms 344 KB Output is correct
74 Correct 0 ms 348 KB Output is correct
75 Correct 0 ms 348 KB Output is correct
76 Correct 0 ms 344 KB Output is correct
77 Correct 0 ms 348 KB Output is correct
78 Correct 0 ms 348 KB Output is correct
79 Correct 1 ms 348 KB Output is correct
80 Correct 0 ms 348 KB Output is correct
81 Correct 0 ms 348 KB Output is correct
82 Correct 1 ms 348 KB Output is correct
83 Correct 0 ms 456 KB Output is correct