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답안 #422848

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
422848 2021-06-10T13:02:12 Z Harry464 Love Polygon (BOI18_polygon) C++14
100 / 100
 690 ms 45756 KB 
#include <iostream>
#include <vector>
#include <map>
#include <set>
#include <queue>
#include <stack>

using namespace std;

typedef long long ll;

vector<set <ll>> idg(100005);
vector<set <ll>> odg(100005);
map <string, ll> mapa;
map <string, bool> ima;

queue <ll> samci;
vector <ll> outcast;

ll neparni = 0;

int main()
{

    ll n;
    cin >> n;

    vector <string> prvi;
    vector <string> drugi;

    ll nodes = 0;

    for (int i = 0; i < n; i++){

        string a, b;
        cin >> a >> b;
        prvi.push_back(a), drugi.push_back(b);

        if (!ima[a])
            ima[a] = true, mapa[a] = nodes, nodes++;
        if (!ima[b])
            ima[b] = true, mapa[b] = nodes, nodes++;

    }

    if (n%2 == 1){

        cout << "-1" << endl;
        return 0;

    }

    for (int i = 0; i < n; i++)
        odg[mapa[prvi[i]]].insert(mapa[drugi[i]]), idg[mapa[drugi[i]]].insert(mapa[prvi[i]]);

    for (int i = 0; i < n; i++)
        if (idg[i].size() == 0)
          samci.push(i);

    ll brop = 0;

    //cout << "ok" << endl;

    vector <bool> vis(100000, false);

    for (int i = 0; i < n; i++){

        ll j = *odg[i].begin();
        if (i == j)
            continue;
        if (i == *odg[j].begin())
            vis[i] = true, vis[j] = true;

    }

    while (samci.size()){

        ll tren = samci.front();
        vis[tren] = true;
        samci.pop();

        ll ljubav = *odg[tren].begin();

        if (vis[ljubav]){

            idg[ljubav].erase(tren);
            outcast.push_back(tren);
            continue;

        }

        ll njljubav = *odg[ljubav].begin();

        vis[ljubav] = true;

        odg[ljubav].erase(njljubav);
        idg[njljubav].erase(ljubav);
        odg[ljubav].insert(tren);

        brop++;

        if (idg[njljubav].size() == 0 && !vis[njljubav])
            samci.push(njljubav);

        idg[tren].insert(ljubav);


    }

    //cout << brop << endl;

    //cout << "ok" << endl;

    for (int i = 0; i < n; i++){

        if (!vis[i]){

            ll pocetak = i;
            ll len = 1;
            ll tren = *odg[i].begin();
            vis[i] = true;
            while (tren != pocetak)
                vis[tren] = true, len++, tren = *odg[tren].begin();

            if (len == 2)
                    continue;

            if (len%2 == 0)
                brop += len/2;
            else
                brop += len/2, neparni++;

        }

    }

    ll rjes = brop + neparni + outcast.size();

    cout << rjes << endl;

}

Subtask #1
21.0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 9676 KB Output is correct
2 Correct 6 ms 9676 KB Output is correct
3 Correct 7 ms 9692 KB Output is correct
4 Correct 7 ms 9676 KB Output is correct
5 Correct 7 ms 9692 KB Output is correct
6 Correct 6 ms 9692 KB Output is correct
7 Correct 6 ms 9676 KB Output is correct
8 Correct 7 ms 9676 KB Output is correct
9 Correct 7 ms 9676 KB Output is correct
10 Correct 7 ms 9700 KB Output is correct
11 Correct 6 ms 9676 KB Output is correct
12 Correct 7 ms 9672 KB Output is correct
13 Correct 7 ms 9692 KB Output is correct
14 Correct 7 ms 9660 KB Output is correct
15 Correct 7 ms 9676 KB Output is correct

Subtask #2
25.0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 9676 KB Output is correct
2 Correct 6 ms 9688 KB Output is correct
3 Correct 7 ms 9676 KB Output is correct
4 Correct 656 ms 43160 KB Output is correct
5 Correct 577 ms 43112 KB Output is correct
6 Correct 606 ms 43176 KB Output is correct
7 Correct 366 ms 33660 KB Output is correct

Subtask #3
29.0 / 29.0

# 결과 실행 시간 메모리 Grader output
1 Correct 625 ms 43540 KB Output is correct
2 Correct 664 ms 43280 KB Output is correct
3 Correct 450 ms 43068 KB Output is correct
4 Correct 350 ms 33808 KB Output is correct
5 Correct 610 ms 43132 KB Output is correct
6 Correct 613 ms 43924 KB Output is correct
7 Correct 614 ms 43928 KB Output is correct
8 Correct 547 ms 43480 KB Output is correct
9 Correct 597 ms 44616 KB Output is correct
10 Correct 457 ms 45744 KB Output is correct
11 Correct 6 ms 9676 KB Output is correct
12 Correct 6 ms 9676 KB Output is correct
13 Correct 6 ms 9612 KB Output is correct
14 Correct 6 ms 9692 KB Output is correct

Subtask #4
25.0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 9676 KB Output is correct
2 Correct 6 ms 9676 KB Output is correct
3 Correct 7 ms 9692 KB Output is correct
4 Correct 7 ms 9676 KB Output is correct
5 Correct 7 ms 9692 KB Output is correct
6 Correct 6 ms 9692 KB Output is correct
7 Correct 6 ms 9676 KB Output is correct
8 Correct 7 ms 9676 KB Output is correct
9 Correct 7 ms 9676 KB Output is correct
10 Correct 7 ms 9700 KB Output is correct
11 Correct 6 ms 9676 KB Output is correct
12 Correct 7 ms 9672 KB Output is correct
13 Correct 7 ms 9692 KB Output is correct
14 Correct 7 ms 9660 KB Output is correct
15 Correct 7 ms 9676 KB Output is correct
16 Correct 6 ms 9676 KB Output is correct
17 Correct 6 ms 9688 KB Output is correct
18 Correct 7 ms 9676 KB Output is correct
19 Correct 656 ms 43160 KB Output is correct
20 Correct 577 ms 43112 KB Output is correct
21 Correct 606 ms 43176 KB Output is correct
22 Correct 366 ms 33660 KB Output is correct
23 Correct 625 ms 43540 KB Output is correct
24 Correct 664 ms 43280 KB Output is correct
25 Correct 450 ms 43068 KB Output is correct
26 Correct 350 ms 33808 KB Output is correct
27 Correct 610 ms 43132 KB Output is correct
28 Correct 613 ms 43924 KB Output is correct
29 Correct 614 ms 43928 KB Output is correct
30 Correct 547 ms 43480 KB Output is correct
31 Correct 597 ms 44616 KB Output is correct
32 Correct 457 ms 45744 KB Output is correct
33 Correct 6 ms 9676 KB Output is correct
34 Correct 6 ms 9676 KB Output is correct
35 Correct 6 ms 9612 KB Output is correct
36 Correct 6 ms 9692 KB Output is correct
37 Correct 690 ms 43320 KB Output is correct
38 Correct 603 ms 43924 KB Output is correct
39 Correct 650 ms 43920 KB Output is correct
40 Correct 613 ms 44084 KB Output is correct
41 Correct 610 ms 44056 KB Output is correct
42 Correct 624 ms 43712 KB Output is correct
43 Correct 674 ms 43796 KB Output is correct
44 Correct 647 ms 43768 KB Output is correct
45 Correct 644 ms 43684 KB Output is correct
46 Correct 632 ms 43652 KB Output is correct
47 Correct 624 ms 44712 KB Output is correct
48 Correct 676 ms 43588 KB Output is correct
49 Correct 627 ms 43300 KB Output is correct
50 Correct 471 ms 43136 KB Output is correct
51 Correct 376 ms 33868 KB Output is correct
52 Correct 673 ms 43176 KB Output is correct
53 Correct 654 ms 43908 KB Output is correct
54 Correct 605 ms 44052 KB Output is correct
55 Correct 543 ms 43548 KB Output is correct
56 Correct 610 ms 44660 KB Output is correct
57 Correct 448 ms 45756 KB Output is correct
58 Correct 6 ms 9676 KB Output is correct
59 Correct 6 ms 9628 KB Output is correct
60 Correct 6 ms 9676 KB Output is correct
61 Correct 7 ms 9716 KB Output is correct
62 Correct 7 ms 9676 KB Output is correct
63 Correct 6 ms 9676 KB Output is correct
64 Correct 7 ms 9696 KB Output is correct
65 Correct 648 ms 43196 KB Output is correct
66 Correct 685 ms 43184 KB Output is correct
67 Correct 674 ms 43196 KB Output is correct
68 Correct 352 ms 33736 KB Output is correct
69 Correct 7 ms 9700 KB Output is correct
70 Correct 7 ms 9700 KB Output is correct
71 Correct 7 ms 9700 KB Output is correct
72 Correct 7 ms 9692 KB Output is correct
73 Correct 6 ms 9700 KB Output is correct
74 Correct 7 ms 9684 KB Output is correct
75 Correct 7 ms 9676 KB Output is correct
76 Correct 7 ms 9684 KB Output is correct
77 Correct 7 ms 9676 KB Output is correct
78 Correct 6 ms 9676 KB Output is correct
79 Correct 7 ms 9700 KB Output is correct
80 Correct 7 ms 9676 KB Output is correct
81 Correct 7 ms 9676 KB Output is correct
82 Correct 7 ms 9696 KB Output is correct
83 Correct 7 ms 9700 KB Output is correct