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Submission #951574

# Submission time Handle Problem Language Result Execution time Memory
951574 2024-03-22T06:52:50 Z SaMuEl0516 Love Polygon (BOI18_polygon) C++17
100 / 100
 140 ms 32240 KB 
#include<bits/stdc++.h>
#include<ext/pb_ds/assoc_container.hpp>
using namespace std;
using namespace __gnu_pbds;
gp_hash_table<string,int>ht;
vector<int>cnt[(int)1e5+5];
int out[(int)1e5+5],sz[(int)1e5+5];
bool vis[(int)1e5+5];
set<pair<int,int>>se;
int main(){
    cin.tie(0)->sync_with_stdio(0);
    int n,c=0,u,v,ans=0;
    string s,t;
    cin>>n;
    if(n%2){
        cout<<-1;
        return 0;
    }
    for(int i=0;i<n;i++){
        cin>>s>>t;
        if(ht.find(s)!=ht.end())u=ht[s];
        else u=ht[s]=c++;
        if(ht.find(t)!=ht.end())v=ht[t];
        else v=ht[t]=c++;
        out[u]=v;
        if(u==v)continue;
        cnt[u].push_back(v),cnt[v].push_back(u);
        sz[u]++,sz[v]++;
    }
    for(int i=0;i<n;i++){
        if(out[out[i]]==i&&out[i]!=i&&!vis[i]){
            ans+=2,vis[i]=vis[out[i]]=1;
            for(int j:cnt[i])sz[j]--;
        }
    }
    for(int i=0;i<n;i++)se.insert({sz[i],i});
    while(se.size()){
        auto p=*se.begin();
        se.erase(se.begin());
        if(p.first==0||vis[p.second])continue;
        for(int i:cnt[p.second]){
            if(!vis[i]){
                vis[p.second]=vis[i]=1;
                for(int j:cnt[p.second]){
                    if(!vis[j]){
                        se.erase({sz[j],j});
                        sz[j]--;
                        se.insert({sz[j],j});
                    }
                }
                for(int j:cnt[i]){
                    if(!vis[j]){
                        se.erase({sz[j],j});
                        sz[j]--;
                        se.insert({sz[j],j});
                    }
                }
                ans++;
                break;
            }
        }
    }
    cout<<n-ans;
}

Subtask #1
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 3420 KB Output is correct
2 Correct 1 ms 3420 KB Output is correct
3 Correct 1 ms 3420 KB Output is correct
4 Correct 2 ms 3524 KB Output is correct
5 Correct 1 ms 3420 KB Output is correct
6 Correct 1 ms 3420 KB Output is correct
7 Correct 1 ms 3420 KB Output is correct
8 Correct 1 ms 3420 KB Output is correct
9 Correct 1 ms 3420 KB Output is correct
10 Correct 2 ms 3524 KB Output is correct
11 Correct 1 ms 3540 KB Output is correct
12 Correct 1 ms 3500 KB Output is correct
13 Correct 1 ms 3420 KB Output is correct
14 Correct 1 ms 3528 KB Output is correct
15 Correct 1 ms 3508 KB Output is correct

Subtask #2
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 3416 KB Output is correct
2 Correct 1 ms 3420 KB Output is correct
3 Correct 1 ms 3528 KB Output is correct
4 Correct 122 ms 31600 KB Output is correct
5 Correct 111 ms 31848 KB Output is correct
6 Correct 115 ms 31948 KB Output is correct
7 Correct 2 ms 3420 KB Output is correct

Subtask #3
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 106 ms 29860 KB Output is correct
2 Correct 109 ms 31868 KB Output is correct
3 Correct 61 ms 24136 KB Output is correct
4 Correct 1 ms 3420 KB Output is correct
5 Correct 106 ms 30788 KB Output is correct
6 Correct 137 ms 31976 KB Output is correct
7 Correct 115 ms 31948 KB Output is correct
8 Correct 82 ms 30916 KB Output is correct
9 Correct 104 ms 32124 KB Output is correct
10 Correct 82 ms 27536 KB Output is correct
11 Correct 1 ms 3420 KB Output is correct
12 Correct 1 ms 3420 KB Output is correct
13 Correct 1 ms 3420 KB Output is correct
14 Correct 2 ms 3420 KB Output is correct

Subtask #4
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 3420 KB Output is correct
2 Correct 1 ms 3420 KB Output is correct
3 Correct 1 ms 3420 KB Output is correct
4 Correct 2 ms 3524 KB Output is correct
5 Correct 1 ms 3420 KB Output is correct
6 Correct 1 ms 3420 KB Output is correct
7 Correct 1 ms 3420 KB Output is correct
8 Correct 1 ms 3420 KB Output is correct
9 Correct 1 ms 3420 KB Output is correct
10 Correct 2 ms 3524 KB Output is correct
11 Correct 1 ms 3540 KB Output is correct
12 Correct 1 ms 3500 KB Output is correct
13 Correct 1 ms 3420 KB Output is correct
14 Correct 1 ms 3528 KB Output is correct
15 Correct 1 ms 3508 KB Output is correct
16 Correct 1 ms 3416 KB Output is correct
17 Correct 1 ms 3420 KB Output is correct
18 Correct 1 ms 3528 KB Output is correct
19 Correct 122 ms 31600 KB Output is correct
20 Correct 111 ms 31848 KB Output is correct
21 Correct 115 ms 31948 KB Output is correct
22 Correct 2 ms 3420 KB Output is correct
23 Correct 106 ms 29860 KB Output is correct
24 Correct 109 ms 31868 KB Output is correct
25 Correct 61 ms 24136 KB Output is correct
26 Correct 1 ms 3420 KB Output is correct
27 Correct 106 ms 30788 KB Output is correct
28 Correct 137 ms 31976 KB Output is correct
29 Correct 115 ms 31948 KB Output is correct
30 Correct 82 ms 30916 KB Output is correct
31 Correct 104 ms 32124 KB Output is correct
32 Correct 82 ms 27536 KB Output is correct
33 Correct 1 ms 3420 KB Output is correct
34 Correct 1 ms 3420 KB Output is correct
35 Correct 1 ms 3420 KB Output is correct
36 Correct 2 ms 3420 KB Output is correct
37 Correct 107 ms 32040 KB Output is correct
38 Correct 136 ms 32048 KB Output is correct
39 Correct 133 ms 29904 KB Output is correct
40 Correct 108 ms 32200 KB Output is correct
41 Correct 131 ms 32240 KB Output is correct
42 Correct 111 ms 31900 KB Output is correct
43 Correct 115 ms 32096 KB Output is correct
44 Correct 118 ms 31952 KB Output is correct
45 Correct 140 ms 32136 KB Output is correct
46 Correct 112 ms 31948 KB Output is correct
47 Correct 120 ms 32052 KB Output is correct
48 Correct 106 ms 31988 KB Output is correct
49 Correct 119 ms 31948 KB Output is correct
50 Correct 56 ms 23976 KB Output is correct
51 Correct 2 ms 3416 KB Output is correct
52 Correct 101 ms 30848 KB Output is correct
53 Correct 109 ms 32044 KB Output is correct
54 Correct 109 ms 31952 KB Output is correct
55 Correct 80 ms 31088 KB Output is correct
56 Correct 106 ms 31952 KB Output is correct
57 Correct 81 ms 27692 KB Output is correct
58 Correct 1 ms 3416 KB Output is correct
59 Correct 1 ms 3420 KB Output is correct
60 Correct 1 ms 3420 KB Output is correct
61 Correct 1 ms 3416 KB Output is correct
62 Correct 1 ms 3416 KB Output is correct
63 Correct 1 ms 3420 KB Output is correct
64 Correct 1 ms 3420 KB Output is correct
65 Correct 107 ms 31660 KB Output is correct
66 Correct 98 ms 31944 KB Output is correct
67 Correct 109 ms 31944 KB Output is correct
68 Correct 1 ms 3416 KB Output is correct
69 Correct 1 ms 3416 KB Output is correct
70 Correct 1 ms 3420 KB Output is correct
71 Correct 1 ms 3420 KB Output is correct
72 Correct 1 ms 3420 KB Output is correct
73 Correct 1 ms 3420 KB Output is correct
74 Correct 1 ms 3420 KB Output is correct
75 Correct 1 ms 3416 KB Output is correct
76 Correct 1 ms 3420 KB Output is correct
77 Correct 1 ms 3420 KB Output is correct
78 Correct 1 ms 3420 KB Output is correct
79 Correct 1 ms 3420 KB Output is correct
80 Correct 2 ms 3420 KB Output is correct
81 Correct 1 ms 3420 KB Output is correct
82 Correct 1 ms 3420 KB Output is correct
83 Correct 1 ms 3420 KB Output is correct