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답안 #643116

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
643116 2022-09-21T08:52:16 Z mahatma_muhammad Love Polygon (BOI18_polygon) C++14
100 / 100
 255 ms 50004 KB 
#include <bits/stdc++.h>
#include <math.h>
//in the name of god,aka allah
//**gray sety orz**
using namespace std;
#define pi pair<long long , long long>
#define pii pair<long long , pair<long long , long long>>
const int maxm = 5e5;
const long long mod = 1e9 + 7 ;
typedef long long ll;
ll l,r,mid;
ll n,m;
ll dis[maxm] , sum[maxm];
bool isval(int mid){
    //cout << mid <<" " << mid*mid-mid <<endl;
    if (((mid-1)*mid)/2 < m) return 0;
    return 1;
}
ll darage[maxm] , ss , mm;
queue<int> q;
vector<pi> g[maxm] , z[maxm];
ll sath[maxm];
bool vis[maxm] , gos[maxm];
ll pedaret[maxm];
ll get_par(ll v){
    if (pedaret[v]==v) return v;
    return pedaret[v] = get_par(pedaret[v]);
}
void merge(ll r , ll q){
    if (get_par(r)!=get_par(q))l+=max(darage[r],darage[q])*1ll*sath[r]*1ll*sath[q];
    r = get_par(r) , q = get_par(q);
    if (r!=q){
        if (sath[r]<sath[q]) swap(r,q);
        pedaret[q] = r;
        sath[r] += sath[q];
    }
    return ;
}
ll pars1[maxm] , pars2[maxm];
vector<ll> se[maxm];
set<string> st;
ll rp[maxm];
pi w[maxm];
ll dp[maxm];
//ll rw[maxm][maxm];
map<string,ll> mp;
const int MM = 1e5+5;
int ind[MM],nxt[MM];
bool done[MM];
vector<int> adj[MM];
string back[MM];
 
int mx = 0;
int conv(string s){
    if(mp.find(s) ==mp.end()) mp.insert({s,mp.size()}), back[mp.size()-1] = s; // 0-index
    return mp[s];
}
int main() {
    cin >> n;
    if(n%2) return cout<<-1,0; 
    for(int i = 0; i < n; i++){
        string a,b;
        cin >> a >> b;
        int aa = conv(a), bb = conv(b);
        nxt[aa] = bb;
        ind[bb]++;
    }
    for(int i = 0; i < n; i++) if(nxt[nxt[i]] == i && nxt[i] != i) done[i] = 1, done[nxt[i]] = 1;
    queue<int> q;
    for(int i = 0; i < n; i++) if(!done[i] && ind[i] == 0) q.push(i);
    
    int ans = 0;
    while(!q.empty())
    {
        int u = q.front(); q.pop();
        //db(back[u])
        ans++; done[u] = 1;
        if(!done[nxt[u]])
        {           
            if(--ind[nxt[nxt[u]]] == 0 && !done[nxt[nxt[u]]]) q.push(nxt[nxt[u]]);
            //db(back[nxt[u]])
            done[nxt[u]] = 1;
        }
    }
    //db(done[conv("d")])
    for(int i = 0; i < n; i++)
    {
        if(!done[i])
        {
            int len = 1;
            done[i] = 1;
            for(int pos = nxt[i]; pos != i; done[pos] = 1, pos = nxt[pos]) len++;
            //db(len)
            ans += (len+1)/2;
        }
    }
 
    cout << ans << "\n";
}

Subtask #1
21.0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 19 ms 41044 KB Output is correct
2 Correct 20 ms 41044 KB Output is correct
3 Correct 19 ms 40976 KB Output is correct
4 Correct 20 ms 41044 KB Output is correct
5 Correct 19 ms 41020 KB Output is correct
6 Correct 21 ms 41044 KB Output is correct
7 Correct 22 ms 41000 KB Output is correct
8 Correct 21 ms 41036 KB Output is correct
9 Correct 20 ms 40956 KB Output is correct
10 Correct 20 ms 41044 KB Output is correct
11 Correct 20 ms 41044 KB Output is correct
12 Correct 20 ms 41044 KB Output is correct
13 Correct 20 ms 40908 KB Output is correct
14 Correct 19 ms 40956 KB Output is correct
15 Correct 19 ms 41048 KB Output is correct

Subtask #2
25.0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 19 ms 41052 KB Output is correct
2 Correct 19 ms 41044 KB Output is correct
3 Correct 19 ms 41044 KB Output is correct
4 Correct 239 ms 49812 KB Output is correct
5 Correct 229 ms 49740 KB Output is correct
6 Correct 252 ms 49700 KB Output is correct
7 Correct 20 ms 40956 KB Output is correct

Subtask #3
29.0 / 29.0

# 결과 실행 시간 메모리 Grader output
1 Correct 231 ms 49836 KB Output is correct
2 Correct 229 ms 49788 KB Output is correct
3 Correct 206 ms 49632 KB Output is correct
4 Correct 21 ms 41044 KB Output is correct
5 Correct 227 ms 49624 KB Output is correct
6 Correct 228 ms 49868 KB Output is correct
7 Correct 239 ms 49992 KB Output is correct
8 Correct 218 ms 49868 KB Output is correct
9 Correct 215 ms 49968 KB Output is correct
10 Correct 197 ms 49740 KB Output is correct
11 Correct 20 ms 41044 KB Output is correct
12 Correct 20 ms 40924 KB Output is correct
13 Correct 21 ms 41044 KB Output is correct
14 Correct 20 ms 40928 KB Output is correct

Subtask #4
25.0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 19 ms 41044 KB Output is correct
2 Correct 20 ms 41044 KB Output is correct
3 Correct 19 ms 40976 KB Output is correct
4 Correct 20 ms 41044 KB Output is correct
5 Correct 19 ms 41020 KB Output is correct
6 Correct 21 ms 41044 KB Output is correct
7 Correct 22 ms 41000 KB Output is correct
8 Correct 21 ms 41036 KB Output is correct
9 Correct 20 ms 40956 KB Output is correct
10 Correct 20 ms 41044 KB Output is correct
11 Correct 20 ms 41044 KB Output is correct
12 Correct 20 ms 41044 KB Output is correct
13 Correct 20 ms 40908 KB Output is correct
14 Correct 19 ms 40956 KB Output is correct
15 Correct 19 ms 41048 KB Output is correct
16 Correct 19 ms 41052 KB Output is correct
17 Correct 19 ms 41044 KB Output is correct
18 Correct 19 ms 41044 KB Output is correct
19 Correct 239 ms 49812 KB Output is correct
20 Correct 229 ms 49740 KB Output is correct
21 Correct 252 ms 49700 KB Output is correct
22 Correct 20 ms 40956 KB Output is correct
23 Correct 231 ms 49836 KB Output is correct
24 Correct 229 ms 49788 KB Output is correct
25 Correct 206 ms 49632 KB Output is correct
26 Correct 21 ms 41044 KB Output is correct
27 Correct 227 ms 49624 KB Output is correct
28 Correct 228 ms 49868 KB Output is correct
29 Correct 239 ms 49992 KB Output is correct
30 Correct 218 ms 49868 KB Output is correct
31 Correct 215 ms 49968 KB Output is correct
32 Correct 197 ms 49740 KB Output is correct
33 Correct 20 ms 41044 KB Output is correct
34 Correct 20 ms 40924 KB Output is correct
35 Correct 21 ms 41044 KB Output is correct
36 Correct 20 ms 40928 KB Output is correct
37 Correct 231 ms 49752 KB Output is correct
38 Correct 231 ms 49908 KB Output is correct
39 Correct 226 ms 49868 KB Output is correct
40 Correct 221 ms 49928 KB Output is correct
41 Correct 233 ms 49868 KB Output is correct
42 Correct 240 ms 49876 KB Output is correct
43 Correct 228 ms 49824 KB Output is correct
44 Correct 231 ms 49768 KB Output is correct
45 Correct 224 ms 49868 KB Output is correct
46 Correct 226 ms 49864 KB Output is correct
47 Correct 229 ms 50004 KB Output is correct
48 Correct 232 ms 49800 KB Output is correct
49 Correct 224 ms 49740 KB Output is correct
50 Correct 203 ms 49712 KB Output is correct
51 Correct 21 ms 41040 KB Output is correct
52 Correct 232 ms 49708 KB Output is correct
53 Correct 220 ms 49868 KB Output is correct
54 Correct 235 ms 49872 KB Output is correct
55 Correct 238 ms 49904 KB Output is correct
56 Correct 217 ms 49996 KB Output is correct
57 Correct 191 ms 49684 KB Output is correct
58 Correct 20 ms 41044 KB Output is correct
59 Correct 20 ms 40952 KB Output is correct
60 Correct 20 ms 41044 KB Output is correct
61 Correct 20 ms 41044 KB Output is correct
62 Correct 20 ms 40968 KB Output is correct
63 Correct 20 ms 41044 KB Output is correct
64 Correct 20 ms 41044 KB Output is correct
65 Correct 227 ms 49624 KB Output is correct
66 Correct 255 ms 49760 KB Output is correct
67 Correct 239 ms 49740 KB Output is correct
68 Correct 20 ms 41044 KB Output is correct
69 Correct 20 ms 40996 KB Output is correct
70 Correct 20 ms 41056 KB Output is correct
71 Correct 21 ms 41044 KB Output is correct
72 Correct 20 ms 41032 KB Output is correct
73 Correct 20 ms 41032 KB Output is correct
74 Correct 21 ms 40972 KB Output is correct
75 Correct 20 ms 40964 KB Output is correct
76 Correct 20 ms 40984 KB Output is correct
77 Correct 21 ms 41032 KB Output is correct
78 Correct 20 ms 41056 KB Output is correct
79 Correct 19 ms 41044 KB Output is correct
80 Correct 19 ms 41024 KB Output is correct
81 Correct 20 ms 40972 KB Output is correct
82 Correct 20 ms 41024 KB Output is correct
83 Correct 20 ms 41044 KB Output is correct