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답안 #384082

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
384082 2021-03-31T11:51:34 Z VodkaInTheJar 조이터에서 친구를 만드는건 재밌어 (JOI20_joitter2) C++14
17 / 100
 5000 ms 46612 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];
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 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: rev_adj[a])
        if (find_root(i) == b)
            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; 

    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 7 ms 9708 KB Output is correct
2 Correct 7 ms 9728 KB Output is correct
3 Correct 8 ms 9708 KB Output is correct
4 Correct 7 ms 9708 KB Output is correct
5 Correct 7 ms 9708 KB Output is correct
6 Correct 8 ms 9708 KB Output is correct
7 Correct 8 ms 9836 KB Output is correct
8 Correct 8 ms 9836 KB Output is correct
9 Correct 8 ms 9836 KB Output is correct
10 Correct 7 ms 9708 KB Output is correct
11 Correct 7 ms 9708 KB Output is correct
12 Correct 7 ms 9708 KB Output is correct
13 Correct 7 ms 9708 KB Output is correct
14 Correct 7 ms 9708 KB Output is correct
15 Correct 7 ms 9708 KB Output is correct
16 Correct 7 ms 9708 KB Output is correct
17 Correct 7 ms 9708 KB Output is correct
18 Correct 7 ms 9708 KB Output is correct
19 Correct 7 ms 9728 KB Output is correct
20 Correct 7 ms 9708 KB Output is correct
21 Correct 8 ms 9836 KB Output is correct
22 Correct 8 ms 9708 KB Output is correct
23 Correct 8 ms 9836 KB Output is correct
24 Correct 7 ms 9708 KB Output is correct
25 Correct 8 ms 9836 KB Output is correct
26 Correct 7 ms 9708 KB Output is correct
27 Correct 7 ms 9728 KB Output is correct
28 Correct 7 ms 9708 KB Output is correct
29 Correct 7 ms 9708 KB Output is correct
30 Correct 7 ms 9708 KB Output is correct
31 Correct 8 ms 9836 KB Output is correct
32 Correct 7 ms 9708 KB Output is correct
33 Correct 8 ms 9836 KB Output is correct

Subtask #2
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 9708 KB Output is correct
2 Correct 7 ms 9728 KB Output is correct
3 Correct 8 ms 9708 KB Output is correct
4 Correct 7 ms 9708 KB Output is correct
5 Correct 7 ms 9708 KB Output is correct
6 Correct 8 ms 9708 KB Output is correct
7 Correct 8 ms 9836 KB Output is correct
8 Correct 8 ms 9836 KB Output is correct
9 Correct 8 ms 9836 KB Output is correct
10 Correct 7 ms 9708 KB Output is correct
11 Correct 7 ms 9708 KB Output is correct
12 Correct 7 ms 9708 KB Output is correct
13 Correct 7 ms 9708 KB Output is correct
14 Correct 7 ms 9708 KB Output is correct
15 Correct 7 ms 9708 KB Output is correct
16 Correct 7 ms 9708 KB Output is correct
17 Correct 7 ms 9708 KB Output is correct
18 Correct 7 ms 9708 KB Output is correct
19 Correct 7 ms 9728 KB Output is correct
20 Correct 7 ms 9708 KB Output is correct
21 Correct 8 ms 9836 KB Output is correct
22 Correct 8 ms 9708 KB Output is correct
23 Correct 8 ms 9836 KB Output is correct
24 Correct 7 ms 9708 KB Output is correct
25 Correct 8 ms 9836 KB Output is correct
26 Correct 7 ms 9708 KB Output is correct
27 Correct 7 ms 9728 KB Output is correct
28 Correct 7 ms 9708 KB Output is correct
29 Correct 7 ms 9708 KB Output is correct
30 Correct 7 ms 9708 KB Output is correct
31 Correct 8 ms 9836 KB Output is correct
32 Correct 7 ms 9708 KB Output is correct
33 Correct 8 ms 9836 KB Output is correct
34 Correct 10 ms 9964 KB Output is correct
35 Correct 102 ms 15212 KB Output is correct
36 Correct 148 ms 16964 KB Output is correct
37 Correct 146 ms 16876 KB Output is correct
38 Correct 143 ms 16608 KB Output is correct
39 Correct 10 ms 10092 KB Output is correct
40 Correct 10 ms 10092 KB Output is correct
41 Correct 10 ms 10092 KB Output is correct
42 Correct 9 ms 9964 KB Output is correct
43 Correct 33 ms 9964 KB Output is correct
44 Correct 31 ms 9964 KB Output is correct
45 Correct 9 ms 9964 KB Output is correct
46 Correct 10 ms 9984 KB Output is correct
47 Correct 11 ms 10092 KB Output is correct
48 Correct 11 ms 10092 KB Output is correct
49 Correct 24 ms 10604 KB Output is correct
50 Correct 149 ms 17004 KB Output is correct
51 Correct 36 ms 10220 KB Output is correct
52 Correct 127 ms 15852 KB Output is correct
53 Correct 25 ms 10604 KB Output is correct
54 Correct 134 ms 16364 KB Output is correct
55 Correct 23 ms 10220 KB Output is correct
56 Correct 23 ms 10220 KB Output is correct
57 Correct 21 ms 10220 KB Output is correct
58 Correct 21 ms 10220 KB Output is correct
59 Correct 9 ms 9964 KB Output is correct
60 Correct 96 ms 14700 KB Output is correct
61 Correct 14 ms 10092 KB Output is correct
62 Correct 140 ms 16492 KB Output is correct

Subtask #3
0 / 83.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 9708 KB Output is correct
2 Correct 7 ms 9728 KB Output is correct
3 Correct 8 ms 9708 KB Output is correct
4 Correct 7 ms 9708 KB Output is correct
5 Correct 7 ms 9708 KB Output is correct
6 Correct 8 ms 9708 KB Output is correct
7 Correct 8 ms 9836 KB Output is correct
8 Correct 8 ms 9836 KB Output is correct
9 Correct 8 ms 9836 KB Output is correct
10 Correct 7 ms 9708 KB Output is correct
11 Correct 7 ms 9708 KB Output is correct
12 Correct 7 ms 9708 KB Output is correct
13 Correct 7 ms 9708 KB Output is correct
14 Correct 7 ms 9708 KB Output is correct
15 Correct 7 ms 9708 KB Output is correct
16 Correct 7 ms 9708 KB Output is correct
17 Correct 7 ms 9708 KB Output is correct
18 Correct 7 ms 9708 KB Output is correct
19 Correct 7 ms 9728 KB Output is correct
20 Correct 7 ms 9708 KB Output is correct
21 Correct 8 ms 9836 KB Output is correct
22 Correct 8 ms 9708 KB Output is correct
23 Correct 8 ms 9836 KB Output is correct
24 Correct 7 ms 9708 KB Output is correct
25 Correct 8 ms 9836 KB Output is correct
26 Correct 7 ms 9708 KB Output is correct
27 Correct 7 ms 9728 KB Output is correct
28 Correct 7 ms 9708 KB Output is correct
29 Correct 7 ms 9708 KB Output is correct
30 Correct 7 ms 9708 KB Output is correct
31 Correct 8 ms 9836 KB Output is correct
32 Correct 7 ms 9708 KB Output is correct
33 Correct 8 ms 9836 KB Output is correct
34 Correct 10 ms 9964 KB Output is correct
35 Correct 102 ms 15212 KB Output is correct
36 Correct 148 ms 16964 KB Output is correct
37 Correct 146 ms 16876 KB Output is correct
38 Correct 143 ms 16608 KB Output is correct
39 Correct 10 ms 10092 KB Output is correct
40 Correct 10 ms 10092 KB Output is correct
41 Correct 10 ms 10092 KB Output is correct
42 Correct 9 ms 9964 KB Output is correct
43 Correct 33 ms 9964 KB Output is correct
44 Correct 31 ms 9964 KB Output is correct
45 Correct 9 ms 9964 KB Output is correct
46 Correct 10 ms 9984 KB Output is correct
47 Correct 11 ms 10092 KB Output is correct
48 Correct 11 ms 10092 KB Output is correct
49 Correct 24 ms 10604 KB Output is correct
50 Correct 149 ms 17004 KB Output is correct
51 Correct 36 ms 10220 KB Output is correct
52 Correct 127 ms 15852 KB Output is correct
53 Correct 25 ms 10604 KB Output is correct
54 Correct 134 ms 16364 KB Output is correct
55 Correct 23 ms 10220 KB Output is correct
56 Correct 23 ms 10220 KB Output is correct
57 Correct 21 ms 10220 KB Output is correct
58 Correct 21 ms 10220 KB Output is correct
59 Correct 9 ms 9964 KB Output is correct
60 Correct 96 ms 14700 KB Output is correct
61 Correct 14 ms 10092 KB Output is correct
62 Correct 140 ms 16492 KB Output is correct
63 Correct 489 ms 46188 KB Output is correct
64 Correct 492 ms 46572 KB Output is correct
65 Correct 512 ms 46612 KB Output is correct
66 Correct 150 ms 25964 KB Output is correct
67 Correct 252 ms 28780 KB Output is correct
68 Correct 147 ms 25964 KB Output is correct
69 Execution timed out 5084 ms 14800 KB Time limit exceeded
70 Halted 0 ms 0 KB -