oj.uz

답안 #855057

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
855057 2023-09-30T02:14:06 Z NeroZein Love Polygon (BOI18_polygon) C++17
100 / 100
 172 ms 13368 KB 
#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

# 결과 실행 시간 메모리 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

Subtask #2
25.0 / 25.0

# 결과 실행 시간 메모리 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

# 결과 실행 시간 메모리 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

# 결과 실행 시간 메모리 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