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답안 #212761

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
212761 2020-03-24T09:09:26 Z Alexa2001 조이터에서 친구를 만드는건 재밌어 (JOI20_joitter2) C++17
100 / 100
 1423 ms 76016 KB 
#include <bits/stdc++.h>

using namespace std;


typedef long long ll;
const int Nmax = 1e5 + 5;

set<int> in[Nmax], cIn[Nmax], cOut[Nmax];

bool dead[Nmax];

vector<int> who[Nmax];

int n, m;
int where[Nmax];

ll ans = 0;


ll take2(int x)
{
    return (ll) x * (x-1);
}


void unite(int x, int y)
{
    if(x == y) return;
    if(dead[x] || dead[y]) return;

    if(cIn[x].find(y) == cIn[x].end() || cOut[x].find(y) == cOut[x].end()) return;

    if(who[x].size() + in[x].size() + cIn[x].size() + cOut[x].size() < who[y].size() + in[y].size() + cIn[y].size())
        swap(x, y);

    ans -= take2(who[x].size());
    ans -= take2(who[y].size());
    ans += take2(who[x].size() + who[y].size());

    ans -= (ll) who[x].size() * in[x].size();
    ans -= (ll) who[y].size() * in[y].size();

 //   for(auto it : in[x]) cerr << it << ' '; cerr << "#\n";
  //  for(auto it : in[y]) cerr << it << ' '; cerr << "#\n";

    for(auto it : who[y])
        if(in[x].find(it) != in[x].end())
            in[x].erase(it);

    for(auto it : in[y])
        if(where[it] != x)
            in[x].insert(it);

    for(auto it : who[y])
    {
        who[x].push_back(it);
        where[it] = x;
    }

    for(auto it : cOut[y])
        if(it != x)
        {
            cIn[it].erase(y);
            cIn[it].insert(x);
            cOut[x].insert(it);
        }

    for(auto it : cIn[y])
        if(it != x)
        {
            cOut[it].erase(y);
            cOut[it].insert(x);
            cIn[x].insert(it);
        }

    ans += (ll) who[x].size() * in[x].size();

    dead[y] = 1;

    for(auto it : cIn[y])
        unite(x, it);

    for(auto it : cOut[y])
        unite(x, it);

    who[y].clear(); in[y].clear(); cIn[y].clear(); cOut[y].clear();
}

void compute(int X, int Y)
{
    int x, y;

    x = where[X];
    y = where[Y];
    if(x == y) return;

    auto itt = in[y].insert(X);
    if(itt.second)
    {
        ans += who[y].size();
        cIn[y].insert(x);
        cOut[x].insert(y);
    }

    unite(x, y);
}

int main()
{
   // freopen("input", "r", stdin);
    cin.sync_with_stdio(false); cin.tie(0);

    cin >> n >> m;

    for(int i=1; i<=n; ++i)
    {
        where[i] = i;
        who[i].push_back(i);
    }

    for(int i=1; i<=m; ++i)
    {
        int x, y;
        cin >> x >> y;
        compute(x, y);
        cout << ans << '\n';
    }

    return 0;
}

Subtask #1
1.0 / 1.0

# 결과 실행 시간 메모리 Grader output
1 Correct 14 ms 16768 KB Output is correct
2 Correct 14 ms 16768 KB Output is correct
3 Correct 14 ms 16768 KB Output is correct
4 Correct 14 ms 16768 KB Output is correct
5 Correct 14 ms 16768 KB Output is correct
6 Correct 14 ms 16768 KB Output is correct
7 Correct 15 ms 16768 KB Output is correct
8 Correct 15 ms 16768 KB Output is correct
9 Correct 19 ms 16896 KB Output is correct
10 Correct 14 ms 16768 KB Output is correct
11 Correct 15 ms 16768 KB Output is correct
12 Correct 14 ms 16768 KB Output is correct
13 Correct 14 ms 16768 KB Output is correct
14 Correct 14 ms 16768 KB Output is correct
15 Correct 15 ms 16768 KB Output is correct
16 Correct 15 ms 16768 KB Output is correct
17 Correct 14 ms 16768 KB Output is correct
18 Correct 14 ms 16768 KB Output is correct
19 Correct 15 ms 16768 KB Output is correct
20 Correct 15 ms 16768 KB Output is correct
21 Correct 15 ms 16896 KB Output is correct
22 Correct 14 ms 16768 KB Output is correct
23 Correct 15 ms 16848 KB Output is correct
24 Correct 16 ms 16768 KB Output is correct
25 Correct 14 ms 16768 KB Output is correct
26 Correct 14 ms 16768 KB Output is correct
27 Correct 14 ms 16768 KB Output is correct
28 Correct 14 ms 16768 KB Output is correct
29 Correct 14 ms 16768 KB Output is correct
30 Correct 14 ms 16768 KB Output is correct
31 Correct 15 ms 16768 KB Output is correct
32 Correct 14 ms 16768 KB Output is correct
33 Correct 15 ms 16896 KB Output is correct

Subtask #2
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 14 ms 16768 KB Output is correct
2 Correct 14 ms 16768 KB Output is correct
3 Correct 14 ms 16768 KB Output is correct
4 Correct 14 ms 16768 KB Output is correct
5 Correct 14 ms 16768 KB Output is correct
6 Correct 14 ms 16768 KB Output is correct
7 Correct 15 ms 16768 KB Output is correct
8 Correct 15 ms 16768 KB Output is correct
9 Correct 19 ms 16896 KB Output is correct
10 Correct 14 ms 16768 KB Output is correct
11 Correct 15 ms 16768 KB Output is correct
12 Correct 14 ms 16768 KB Output is correct
13 Correct 14 ms 16768 KB Output is correct
14 Correct 14 ms 16768 KB Output is correct
15 Correct 15 ms 16768 KB Output is correct
16 Correct 15 ms 16768 KB Output is correct
17 Correct 14 ms 16768 KB Output is correct
18 Correct 14 ms 16768 KB Output is correct
19 Correct 15 ms 16768 KB Output is correct
20 Correct 15 ms 16768 KB Output is correct
21 Correct 15 ms 16896 KB Output is correct
22 Correct 14 ms 16768 KB Output is correct
23 Correct 15 ms 16848 KB Output is correct
24 Correct 16 ms 16768 KB Output is correct
25 Correct 14 ms 16768 KB Output is correct
26 Correct 14 ms 16768 KB Output is correct
27 Correct 14 ms 16768 KB Output is correct
28 Correct 14 ms 16768 KB Output is correct
29 Correct 14 ms 16768 KB Output is correct
30 Correct 14 ms 16768 KB Output is correct
31 Correct 15 ms 16768 KB Output is correct
32 Correct 14 ms 16768 KB Output is correct
33 Correct 15 ms 16896 KB Output is correct
34 Correct 17 ms 16896 KB Output is correct
35 Correct 97 ms 22648 KB Output is correct
36 Correct 123 ms 25464 KB Output is correct
37 Correct 125 ms 25592 KB Output is correct
38 Correct 122 ms 25208 KB Output is correct
39 Correct 18 ms 17152 KB Output is correct
40 Correct 22 ms 17408 KB Output is correct
41 Correct 21 ms 17408 KB Output is correct
42 Correct 17 ms 17152 KB Output is correct
43 Correct 18 ms 17152 KB Output is correct
44 Correct 18 ms 17152 KB Output is correct
45 Correct 18 ms 17152 KB Output is correct
46 Correct 18 ms 17152 KB Output is correct
47 Correct 20 ms 17280 KB Output is correct
48 Correct 20 ms 17280 KB Output is correct
49 Correct 26 ms 18048 KB Output is correct
50 Correct 121 ms 25592 KB Output is correct
51 Correct 24 ms 17408 KB Output is correct
52 Correct 111 ms 24060 KB Output is correct
53 Correct 26 ms 17920 KB Output is correct
54 Correct 115 ms 24896 KB Output is correct
55 Correct 21 ms 17536 KB Output is correct
56 Correct 23 ms 17664 KB Output is correct
57 Correct 20 ms 17920 KB Output is correct
58 Correct 21 ms 17920 KB Output is correct
59 Correct 21 ms 17408 KB Output is correct
60 Correct 102 ms 22396 KB Output is correct
61 Correct 21 ms 17280 KB Output is correct
62 Correct 122 ms 25204 KB Output is correct

Subtask #3
83.0 / 83.0

# 결과 실행 시간 메모리 Grader output
1 Correct 14 ms 16768 KB Output is correct
2 Correct 14 ms 16768 KB Output is correct
3 Correct 14 ms 16768 KB Output is correct
4 Correct 14 ms 16768 KB Output is correct
5 Correct 14 ms 16768 KB Output is correct
6 Correct 14 ms 16768 KB Output is correct
7 Correct 15 ms 16768 KB Output is correct
8 Correct 15 ms 16768 KB Output is correct
9 Correct 19 ms 16896 KB Output is correct
10 Correct 14 ms 16768 KB Output is correct
11 Correct 15 ms 16768 KB Output is correct
12 Correct 14 ms 16768 KB Output is correct
13 Correct 14 ms 16768 KB Output is correct
14 Correct 14 ms 16768 KB Output is correct
15 Correct 15 ms 16768 KB Output is correct
16 Correct 15 ms 16768 KB Output is correct
17 Correct 14 ms 16768 KB Output is correct
18 Correct 14 ms 16768 KB Output is correct
19 Correct 15 ms 16768 KB Output is correct
20 Correct 15 ms 16768 KB Output is correct
21 Correct 15 ms 16896 KB Output is correct
22 Correct 14 ms 16768 KB Output is correct
23 Correct 15 ms 16848 KB Output is correct
24 Correct 16 ms 16768 KB Output is correct
25 Correct 14 ms 16768 KB Output is correct
26 Correct 14 ms 16768 KB Output is correct
27 Correct 14 ms 16768 KB Output is correct
28 Correct 14 ms 16768 KB Output is correct
29 Correct 14 ms 16768 KB Output is correct
30 Correct 14 ms 16768 KB Output is correct
31 Correct 15 ms 16768 KB Output is correct
32 Correct 14 ms 16768 KB Output is correct
33 Correct 15 ms 16896 KB Output is correct
34 Correct 17 ms 16896 KB Output is correct
35 Correct 97 ms 22648 KB Output is correct
36 Correct 123 ms 25464 KB Output is correct
37 Correct 125 ms 25592 KB Output is correct
38 Correct 122 ms 25208 KB Output is correct
39 Correct 18 ms 17152 KB Output is correct
40 Correct 22 ms 17408 KB Output is correct
41 Correct 21 ms 17408 KB Output is correct
42 Correct 17 ms 17152 KB Output is correct
43 Correct 18 ms 17152 KB Output is correct
44 Correct 18 ms 17152 KB Output is correct
45 Correct 18 ms 17152 KB Output is correct
46 Correct 18 ms 17152 KB Output is correct
47 Correct 20 ms 17280 KB Output is correct
48 Correct 20 ms 17280 KB Output is correct
49 Correct 26 ms 18048 KB Output is correct
50 Correct 121 ms 25592 KB Output is correct
51 Correct 24 ms 17408 KB Output is correct
52 Correct 111 ms 24060 KB Output is correct
53 Correct 26 ms 17920 KB Output is correct
54 Correct 115 ms 24896 KB Output is correct
55 Correct 21 ms 17536 KB Output is correct
56 Correct 23 ms 17664 KB Output is correct
57 Correct 20 ms 17920 KB Output is correct
58 Correct 21 ms 17920 KB Output is correct
59 Correct 21 ms 17408 KB Output is correct
60 Correct 102 ms 22396 KB Output is correct
61 Correct 21 ms 17280 KB Output is correct
62 Correct 122 ms 25204 KB Output is correct
63 Correct 578 ms 68020 KB Output is correct
64 Correct 600 ms 68016 KB Output is correct
65 Correct 602 ms 68188 KB Output is correct
66 Correct 277 ms 34672 KB Output is correct
67 Correct 1075 ms 49496 KB Output is correct
68 Correct 267 ms 34672 KB Output is correct
69 Correct 492 ms 35824 KB Output is correct
70 Correct 280 ms 34800 KB Output is correct
71 Correct 273 ms 34672 KB Output is correct
72 Correct 771 ms 43756 KB Output is correct
73 Correct 821 ms 44656 KB Output is correct
74 Correct 1423 ms 64172 KB Output is correct
75 Correct 693 ms 40688 KB Output is correct
76 Correct 1010 ms 52084 KB Output is correct
77 Correct 1020 ms 52460 KB Output is correct
78 Correct 276 ms 35828 KB Output is correct
79 Correct 467 ms 39792 KB Output is correct
80 Correct 318 ms 35700 KB Output is correct
81 Correct 516 ms 39536 KB Output is correct
82 Correct 855 ms 52984 KB Output is correct
83 Correct 862 ms 52856 KB Output is correct
84 Correct 699 ms 76016 KB Output is correct
85 Correct 671 ms 76016 KB Output is correct
86 Correct 925 ms 49388 KB Output is correct
87 Correct 946 ms 51692 KB Output is correct
88 Correct 818 ms 43640 KB Output is correct
89 Correct 1035 ms 47176 KB Output is correct