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답안 #384084

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
384084 2021-03-31T11:56:07 Z VodkaInTheJar 조이터에서 친구를 만드는건 재밌어 (JOI20_joitter2) C++14
17 / 100
 5000 ms 63724 KB 
#include <bits/stdc++.h>
#pragma GCC optimize("O3")
#define endl '\n'

using namespace std;

const int maxn = 1e5 + 3; 

int n, m; 
void read()
{
	cin >> n >> m; 
}

int par[maxn], sz[maxn];
set <int> adj[maxn], rev_adj[maxn], members[maxn];

int find_root(int ver)
{
    if (ver == par[ver])
        return ver;

    return par[ver] = find_root(par[ver]);
}

long long ans = 0; 
void merge(int a, int b)
{
    a = find_root(a), b = find_root(b);
    
    if (a == b)
        return;

    ans -= 1ll * sz[a] * (sz[a] - 1);
    ans -= 1ll * sz[b] * (sz[b] - 1);
    ans -= 1ll * (int)rev_adj[a].size() * sz[a];
    ans -= 1ll * (int)rev_adj[b].size() * sz[b];

    if (sz[a] < sz[b])
        swap(a, b);

    for (auto i: members[b])
        members[a].insert(i);

    for (auto j: adj[b])
        if (j != a)
        adj[a].insert(j);

    for (auto j: rev_adj[b])
    {
        if (find_root(j) == a)
            continue;

        adj[find_root(j)].erase(b);
        adj[find_root(j)].insert(a);
        rev_adj[a].insert(j);
    }
    
    adj[a].erase(b);
    vector <int> to_remove;
    for (auto i: members[b])
        if (rev_adj[a].find(i) != rev_adj[a].end())
            to_remove.push_back(i);

    for (auto i: to_remove)
        rev_adj[a].erase(i);
    
    /*
    cout << a << ":";
    for (auto i: adj[a])
        cout << i << " ";

    cout << endl;
    cout << endl;
    for (auto i: rev_adj[a])
        cout << i << " ";
 //   cout << endl;
   // cout << rev_adj[1].size() << endl; 
  //  cout << endl;
    exit(0);
    */


    par[b] = a;
    sz[a] += sz[b];
    ans += 1ll * sz[a] * (sz[a] - 1);
    ans += 1ll * (int)rev_adj[a].size() * sz[a];
}

pair <int, int> e[maxn * 3];
void solve()
{
    for (int i = 1; i <= n; i++)
    {
        par[i] = i, sz[i] = 1; 
        members[i].insert(i);
    }

    for (int i = 1; i <= m; i++)
    {
        cin >> e[i].first >> e[i].second;
        
        int a = find_root(e[i].first), b = find_root(e[i].second);
        if (a != b)
        {
            ans -= 1ll * (int)rev_adj[b].size() * sz[b]; 
            adj[a].insert(b);
            rev_adj[b].insert(e[i].first);

            ans += 1ll * (int)rev_adj[b].size() * sz[b];

            int curr = a;
            for (;;)
            {
                bool can = false;
                for (auto j: adj[curr])
                    if (adj[j].find(curr) != adj[j].end())
                    {
                        merge(j, curr);
                        curr = find_root(curr);
                        can = true;
                        break;
                    }

                if (!can)
                    break;
            }
        }

        //cout << i << "shit" << (int)rev_adj[2].size() << endl;
       // cout << find_ans(i) << endl; 
       cout << ans << endl; 
    }
}

int main()
{
    ios_base::sync_with_stdio(false);
	cin.tie(nullptr);
	cout.tie(nullptr);
	
	read();
	solve();
}

Subtask #1
1.0 / 1.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 14444 KB Output is correct
2 Correct 10 ms 14444 KB Output is correct
3 Correct 10 ms 14444 KB Output is correct
4 Correct 10 ms 14444 KB Output is correct
5 Correct 10 ms 14444 KB Output is correct
6 Correct 11 ms 14444 KB Output is correct
7 Correct 13 ms 14444 KB Output is correct
8 Correct 11 ms 14444 KB Output is correct
9 Correct 11 ms 14444 KB Output is correct
10 Correct 11 ms 14444 KB Output is correct
11 Correct 11 ms 14444 KB Output is correct
12 Correct 11 ms 14444 KB Output is correct
13 Correct 11 ms 14444 KB Output is correct
14 Correct 11 ms 14592 KB Output is correct
15 Correct 11 ms 14444 KB Output is correct
16 Correct 11 ms 14572 KB Output is correct
17 Correct 11 ms 14444 KB Output is correct
18 Correct 10 ms 14444 KB Output is correct
19 Correct 11 ms 14444 KB Output is correct
20 Correct 11 ms 14444 KB Output is correct
21 Correct 11 ms 14444 KB Output is correct
22 Correct 11 ms 14444 KB Output is correct
23 Correct 13 ms 14444 KB Output is correct
24 Correct 11 ms 14444 KB Output is correct
25 Correct 11 ms 14444 KB Output is correct
26 Correct 11 ms 14444 KB Output is correct
27 Correct 10 ms 14444 KB Output is correct
28 Correct 11 ms 14444 KB Output is correct
29 Correct 12 ms 14444 KB Output is correct
30 Correct 10 ms 14444 KB Output is correct
31 Correct 11 ms 14444 KB Output is correct
32 Correct 11 ms 14444 KB Output is correct
33 Correct 11 ms 14464 KB Output is correct

Subtask #2
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 14444 KB Output is correct
2 Correct 10 ms 14444 KB Output is correct
3 Correct 10 ms 14444 KB Output is correct
4 Correct 10 ms 14444 KB Output is correct
5 Correct 10 ms 14444 KB Output is correct
6 Correct 11 ms 14444 KB Output is correct
7 Correct 13 ms 14444 KB Output is correct
8 Correct 11 ms 14444 KB Output is correct
9 Correct 11 ms 14444 KB Output is correct
10 Correct 11 ms 14444 KB Output is correct
11 Correct 11 ms 14444 KB Output is correct
12 Correct 11 ms 14444 KB Output is correct
13 Correct 11 ms 14444 KB Output is correct
14 Correct 11 ms 14592 KB Output is correct
15 Correct 11 ms 14444 KB Output is correct
16 Correct 11 ms 14572 KB Output is correct
17 Correct 11 ms 14444 KB Output is correct
18 Correct 10 ms 14444 KB Output is correct
19 Correct 11 ms 14444 KB Output is correct
20 Correct 11 ms 14444 KB Output is correct
21 Correct 11 ms 14444 KB Output is correct
22 Correct 11 ms 14444 KB Output is correct
23 Correct 13 ms 14444 KB Output is correct
24 Correct 11 ms 14444 KB Output is correct
25 Correct 11 ms 14444 KB Output is correct
26 Correct 11 ms 14444 KB Output is correct
27 Correct 10 ms 14444 KB Output is correct
28 Correct 11 ms 14444 KB Output is correct
29 Correct 12 ms 14444 KB Output is correct
30 Correct 10 ms 14444 KB Output is correct
31 Correct 11 ms 14444 KB Output is correct
32 Correct 11 ms 14444 KB Output is correct
33 Correct 11 ms 14464 KB Output is correct
34 Correct 13 ms 14572 KB Output is correct
35 Correct 96 ms 19824 KB Output is correct
36 Correct 124 ms 21612 KB Output is correct
37 Correct 135 ms 21740 KB Output is correct
38 Correct 126 ms 21356 KB Output is correct
39 Correct 13 ms 14956 KB Output is correct
40 Correct 17 ms 15212 KB Output is correct
41 Correct 15 ms 15212 KB Output is correct
42 Correct 13 ms 14956 KB Output is correct
43 Correct 30 ms 14956 KB Output is correct
44 Correct 28 ms 14956 KB Output is correct
45 Correct 13 ms 14956 KB Output is correct
46 Correct 13 ms 14956 KB Output is correct
47 Correct 18 ms 15084 KB Output is correct
48 Correct 16 ms 15084 KB Output is correct
49 Correct 22 ms 15468 KB Output is correct
50 Correct 134 ms 21740 KB Output is correct
51 Correct 32 ms 15084 KB Output is correct
52 Correct 109 ms 20588 KB Output is correct
53 Correct 24 ms 15468 KB Output is correct
54 Correct 115 ms 21228 KB Output is correct
55 Correct 21 ms 15084 KB Output is correct
56 Correct 21 ms 15212 KB Output is correct
57 Correct 23 ms 15084 KB Output is correct
58 Correct 20 ms 15084 KB Output is correct
59 Correct 15 ms 15340 KB Output is correct
60 Correct 111 ms 20076 KB Output is correct
61 Correct 18 ms 15084 KB Output is correct
62 Correct 122 ms 21356 KB Output is correct

Subtask #3
0 / 83.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 14444 KB Output is correct
2 Correct 10 ms 14444 KB Output is correct
3 Correct 10 ms 14444 KB Output is correct
4 Correct 10 ms 14444 KB Output is correct
5 Correct 10 ms 14444 KB Output is correct
6 Correct 11 ms 14444 KB Output is correct
7 Correct 13 ms 14444 KB Output is correct
8 Correct 11 ms 14444 KB Output is correct
9 Correct 11 ms 14444 KB Output is correct
10 Correct 11 ms 14444 KB Output is correct
11 Correct 11 ms 14444 KB Output is correct
12 Correct 11 ms 14444 KB Output is correct
13 Correct 11 ms 14444 KB Output is correct
14 Correct 11 ms 14592 KB Output is correct
15 Correct 11 ms 14444 KB Output is correct
16 Correct 11 ms 14572 KB Output is correct
17 Correct 11 ms 14444 KB Output is correct
18 Correct 10 ms 14444 KB Output is correct
19 Correct 11 ms 14444 KB Output is correct
20 Correct 11 ms 14444 KB Output is correct
21 Correct 11 ms 14444 KB Output is correct
22 Correct 11 ms 14444 KB Output is correct
23 Correct 13 ms 14444 KB Output is correct
24 Correct 11 ms 14444 KB Output is correct
25 Correct 11 ms 14444 KB Output is correct
26 Correct 11 ms 14444 KB Output is correct
27 Correct 10 ms 14444 KB Output is correct
28 Correct 11 ms 14444 KB Output is correct
29 Correct 12 ms 14444 KB Output is correct
30 Correct 10 ms 14444 KB Output is correct
31 Correct 11 ms 14444 KB Output is correct
32 Correct 11 ms 14444 KB Output is correct
33 Correct 11 ms 14464 KB Output is correct
34 Correct 13 ms 14572 KB Output is correct
35 Correct 96 ms 19824 KB Output is correct
36 Correct 124 ms 21612 KB Output is correct
37 Correct 135 ms 21740 KB Output is correct
38 Correct 126 ms 21356 KB Output is correct
39 Correct 13 ms 14956 KB Output is correct
40 Correct 17 ms 15212 KB Output is correct
41 Correct 15 ms 15212 KB Output is correct
42 Correct 13 ms 14956 KB Output is correct
43 Correct 30 ms 14956 KB Output is correct
44 Correct 28 ms 14956 KB Output is correct
45 Correct 13 ms 14956 KB Output is correct
46 Correct 13 ms 14956 KB Output is correct
47 Correct 18 ms 15084 KB Output is correct
48 Correct 16 ms 15084 KB Output is correct
49 Correct 22 ms 15468 KB Output is correct
50 Correct 134 ms 21740 KB Output is correct
51 Correct 32 ms 15084 KB Output is correct
52 Correct 109 ms 20588 KB Output is correct
53 Correct 24 ms 15468 KB Output is correct
54 Correct 115 ms 21228 KB Output is correct
55 Correct 21 ms 15084 KB Output is correct
56 Correct 21 ms 15212 KB Output is correct
57 Correct 23 ms 15084 KB Output is correct
58 Correct 20 ms 15084 KB Output is correct
59 Correct 15 ms 15340 KB Output is correct
60 Correct 111 ms 20076 KB Output is correct
61 Correct 18 ms 15084 KB Output is correct
62 Correct 122 ms 21356 KB Output is correct
63 Correct 515 ms 52460 KB Output is correct
64 Correct 516 ms 52844 KB Output is correct
65 Correct 528 ms 52504 KB Output is correct
66 Correct 299 ms 37868 KB Output is correct
67 Correct 461 ms 63724 KB Output is correct
68 Correct 284 ms 37740 KB Output is correct
69 Execution timed out 5046 ms 23944 KB Time limit exceeded
70 Halted 0 ms 0 KB -