Submission #855057

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
855057	2023-09-30T02:14:06 Z	NeroZein	Love Polygon (BOI18_polygon)	C++17	100 / 100	172 ms	13368 KB

polygon

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

#ifdef Nero
#include "Deb.h"
#else
#define deb(...)
#endif

int main(){
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  int n;
  cin >> n;
  int id = 0; 
  map<string, int> mp;
  vector<int> to(n * 2); 
  vector<int> deg(n * 2); 
  for (int i = 0; i < n; ++i) {
    string s1, s2;
    cin >> s1 >> s2;
    if (!mp.count(s1)) {
      mp[s1] = id++; 
    }
    if (!mp.count(s2)) {
      mp[s2] = id++; 
    }
    if (s1 != s2) {
      deg[mp[s2]]++;       
    }
    to[mp[s1]] = mp[s2]; 
  }
  if (n % 2) {
    cout << -1 << '\n';
    return 0; 
  }
  vector<bool> matched(id); 
  priority_queue<pair<int, int>, vector<pair<int, int>>, greater<pair<int, int>>> pq; 
  for (int i = 0; i < id; ++i) {
    if (to[i] != i && to[to[i]] == i) {
      matched[i] = true; 
    } 
    pq.emplace(deg[i], i); 
  }
  int ans = 0; 
  while (!pq.empty()) {
    auto [d, v] = pq.top();
    pq.pop(); 
    if (matched[v]) {
      continue;
    }
    ans++; 
    matched[v] = true;
    if (!matched[to[v]]) {//I deleted his edge as it's not pointing to me
      matched[to[v]] = true;
      deg[to[to[v]]]--;
      pq.emplace(deg[to[to[v]]], to[to[v]]); 
    }
  }
  cout << ans << '\n'; 
  return 0;
}

Subtask #1
21.0 / 21.0

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

Subtask #2
25.0 / 25.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	165 ms	11044 KB	Output is correct
5	Correct	156 ms	10820 KB	Output is correct
6	Correct	157 ms	10764 KB	Output is correct
7	Correct	142 ms	9740 KB	Output is correct

Subtask #3
29.0 / 29.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	159 ms	10856 KB	Output is correct
2	Correct	159 ms	10892 KB	Output is correct
3	Correct	123 ms	10764 KB	Output is correct
4	Correct	146 ms	9844 KB	Output is correct
5	Correct	163 ms	10888 KB	Output is correct
6	Correct	163 ms	10936 KB	Output is correct
7	Correct	159 ms	11024 KB	Output is correct
8	Correct	144 ms	10952 KB	Output is correct
9	Correct	147 ms	10808 KB	Output is correct
10	Correct	113 ms	11004 KB	Output is correct
11	Correct	1 ms	344 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

Subtask #4
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	0 ms	348 KB	Output is correct
5	Correct	0 ms	348 KB	Output is correct
6	Correct	0 ms	348 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	348 KB	Output is correct
17	Correct	0 ms	348 KB	Output is correct
18	Correct	0 ms	348 KB	Output is correct
19	Correct	165 ms	11044 KB	Output is correct
20	Correct	156 ms	10820 KB	Output is correct
21	Correct	157 ms	10764 KB	Output is correct
22	Correct	142 ms	9740 KB	Output is correct
23	Correct	159 ms	10856 KB	Output is correct
24	Correct	159 ms	10892 KB	Output is correct
25	Correct	123 ms	10764 KB	Output is correct
26	Correct	146 ms	9844 KB	Output is correct
27	Correct	163 ms	10888 KB	Output is correct
28	Correct	163 ms	10936 KB	Output is correct
29	Correct	159 ms	11024 KB	Output is correct
30	Correct	144 ms	10952 KB	Output is correct
31	Correct	147 ms	10808 KB	Output is correct
32	Correct	113 ms	11004 KB	Output is correct
33	Correct	1 ms	344 KB	Output is correct
34	Correct	0 ms	348 KB	Output is correct
35	Correct	0 ms	348 KB	Output is correct
36	Correct	0 ms	348 KB	Output is correct
37	Correct	166 ms	10876 KB	Output is correct
38	Correct	161 ms	10952 KB	Output is correct
39	Correct	160 ms	12940 KB	Output is correct
40	Correct	159 ms	13052 KB	Output is correct
41	Correct	160 ms	13028 KB	Output is correct
42	Correct	159 ms	13004 KB	Output is correct
43	Correct	172 ms	13368 KB	Output is correct
44	Correct	160 ms	13040 KB	Output is correct
45	Correct	165 ms	13004 KB	Output is correct
46	Correct	164 ms	13004 KB	Output is correct
47	Correct	150 ms	12928 KB	Output is correct
48	Correct	161 ms	13116 KB	Output is correct
49	Correct	159 ms	13064 KB	Output is correct
50	Correct	122 ms	13000 KB	Output is correct
51	Correct	141 ms	11948 KB	Output is correct
52	Correct	161 ms	13004 KB	Output is correct
53	Correct	168 ms	13144 KB	Output is correct
54	Correct	158 ms	13156 KB	Output is correct
55	Correct	142 ms	13004 KB	Output is correct
56	Correct	147 ms	13164 KB	Output is correct
57	Correct	113 ms	12940 KB	Output is correct
58	Correct	0 ms	348 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	600 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	156 ms	13004 KB	Output is correct
66	Correct	155 ms	13004 KB	Output is correct
67	Correct	157 ms	12996 KB	Output is correct
68	Correct	143 ms	11860 KB	Output is correct
69	Correct	1 ms	348 KB	Output is correct
70	Correct	0 ms	348 KB	Output is correct
71	Correct	0 ms	348 KB	Output is correct
72	Correct	0 ms	348 KB	Output is correct
73	Correct	0 ms	348 KB	Output is correct
74	Correct	0 ms	344 KB	Output is correct
75	Correct	0 ms	348 KB	Output is correct
76	Correct	0 ms	348 KB	Output is correct
77	Correct	0 ms	348 KB	Output is correct
78	Correct	0 ms	344 KB	Output is correct
79	Correct	0 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	0 ms	348 KB	Output is correct
83	Correct	0 ms	348 KB	Output is correct

Submission #855057

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