oj.uz

Submission #374041

# Submission time Handle Problem Language Result Execution time Memory
374041 2021-03-06T13:34:19 Z duchung Making Friends on Joitter is Fun (JOI20_joitter2) C++17
17 / 100
 462 ms 44324 KB 
#define ii pair<int , int>

#include <bits/stdc++.h>
using namespace std;

const int N = 1e5 + 5;

int n , m , ans;
int parent[N] , sz[N];
set<ii> edge[N];
set<int> group[N];

int find_set(int u)
{
    if (u == parent[u]) return u;
    return parent[u] = find_set(parent[u]);
}

void join(int U , int V)
{
    int u = find_set(U) , v = find_set(V);
    if (u == v) return;

    auto it = edge[v].lower_bound(make_pair(u , 0));
    if (it != edge[v].end() && it->first == u)
    {
        ans += sz[u] * sz[v] * 2;

        if (edge[u].size() + group[u].size() > edge[v].size() + group[v].size()) swap(u , v);

        vector<ii> new_edge;
        for (auto e : edge[u])
        {
            group[e.first].erase(e.second);
            ans -= sz[e.first];
            if (e.first != v) new_edge.push_back(e);
        }

        edge[u].clear();
        ans -= sz[u] * group[u].size();
        ans += sz[u] * group[v].size();

        vector<int> new_group;
        for (auto X : group[u])
        {
            int x = find_set(X);
            edge[x].erase({u , X});
            if (x != v) new_group.push_back(X);
        }

        group[u].clear();
        parent[u] = v , sz[v] += sz[u];
        for (auto e : new_edge) join(e.second , e.first);
        for (auto X : new_group) join(X , v);

    }
    else if (!group[v].count(U))
    {
        ans += sz[v];
        edge[u].emplace(make_pair(v , U));
        group[v].insert(U);
    }

}

int main()
{
    // freopen(".inp","r",stdin);
    // freopen(".out","w",stdout);
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    cin >> n >> m;

    for (int i = 1 ; i <= n ; ++i)
    {
        parent[i] = i;
        sz[i] = 1;
    }

    while(m--)
    {
        int U , V;
        cin >> U >> V;
        join(U , V);
        cout << ans << "\n";
    }

}

Subtask #1
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 9708 KB Output is correct
2 Correct 7 ms 9708 KB Output is correct
3 Correct 7 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 6 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 9792 KB Output is correct
16 Correct 7 ms 9708 KB Output is correct
17 Correct 7 ms 9708 KB Output is correct
18 Correct 8 ms 9708 KB Output is correct
19 Correct 8 ms 9708 KB Output is correct
20 Correct 7 ms 9708 KB Output is correct
21 Correct 7 ms 9836 KB Output is correct
22 Correct 7 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 7 ms 9836 KB Output is correct
26 Correct 7 ms 9708 KB Output is correct
27 Correct 7 ms 9708 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 9728 KB Output is correct
31 Correct 7 ms 9856 KB Output is correct
32 Correct 7 ms 9708 KB Output is correct
33 Correct 7 ms 9836 KB Output is correct

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 9708 KB Output is correct
2 Correct 7 ms 9708 KB Output is correct
3 Correct 7 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 6 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 9792 KB Output is correct
16 Correct 7 ms 9708 KB Output is correct
17 Correct 7 ms 9708 KB Output is correct
18 Correct 8 ms 9708 KB Output is correct
19 Correct 8 ms 9708 KB Output is correct
20 Correct 7 ms 9708 KB Output is correct
21 Correct 7 ms 9836 KB Output is correct
22 Correct 7 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 7 ms 9836 KB Output is correct
26 Correct 7 ms 9708 KB Output is correct
27 Correct 7 ms 9708 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 9728 KB Output is correct
31 Correct 7 ms 9856 KB Output is correct
32 Correct 7 ms 9708 KB Output is correct
33 Correct 7 ms 9836 KB Output is correct
34 Correct 11 ms 9964 KB Output is correct
35 Correct 95 ms 15212 KB Output is correct
36 Correct 115 ms 17388 KB Output is correct
37 Correct 117 ms 17388 KB Output is correct
38 Correct 125 ms 17260 KB Output is correct
39 Correct 8 ms 9836 KB Output is correct
40 Correct 10 ms 9964 KB Output is correct
41 Correct 9 ms 9964 KB Output is correct
42 Correct 8 ms 9836 KB Output is correct
43 Correct 9 ms 9964 KB Output is correct
44 Correct 9 ms 9964 KB Output is correct
45 Correct 8 ms 9836 KB Output is correct
46 Correct 8 ms 9836 KB Output is correct
47 Correct 9 ms 9964 KB Output is correct
48 Correct 9 ms 9964 KB Output is correct
49 Correct 15 ms 10476 KB Output is correct
50 Correct 116 ms 17388 KB Output is correct
51 Correct 13 ms 10092 KB Output is correct
52 Correct 104 ms 16236 KB Output is correct
53 Correct 15 ms 10476 KB Output is correct
54 Correct 109 ms 16876 KB Output is correct
55 Correct 11 ms 10220 KB Output is correct
56 Correct 11 ms 10220 KB Output is correct
57 Correct 11 ms 10348 KB Output is correct
58 Correct 11 ms 10220 KB Output is correct
59 Correct 8 ms 9836 KB Output is correct
60 Correct 92 ms 14828 KB Output is correct
61 Correct 10 ms 9964 KB Output is correct
62 Correct 113 ms 17132 KB Output is correct

Subtask #3
0 / 83.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 9708 KB Output is correct
2 Correct 7 ms 9708 KB Output is correct
3 Correct 7 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 6 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 9792 KB Output is correct
16 Correct 7 ms 9708 KB Output is correct
17 Correct 7 ms 9708 KB Output is correct
18 Correct 8 ms 9708 KB Output is correct
19 Correct 8 ms 9708 KB Output is correct
20 Correct 7 ms 9708 KB Output is correct
21 Correct 7 ms 9836 KB Output is correct
22 Correct 7 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 7 ms 9836 KB Output is correct
26 Correct 7 ms 9708 KB Output is correct
27 Correct 7 ms 9708 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 9728 KB Output is correct
31 Correct 7 ms 9856 KB Output is correct
32 Correct 7 ms 9708 KB Output is correct
33 Correct 7 ms 9836 KB Output is correct
34 Correct 11 ms 9964 KB Output is correct
35 Correct 95 ms 15212 KB Output is correct
36 Correct 115 ms 17388 KB Output is correct
37 Correct 117 ms 17388 KB Output is correct
38 Correct 125 ms 17260 KB Output is correct
39 Correct 8 ms 9836 KB Output is correct
40 Correct 10 ms 9964 KB Output is correct
41 Correct 9 ms 9964 KB Output is correct
42 Correct 8 ms 9836 KB Output is correct
43 Correct 9 ms 9964 KB Output is correct
44 Correct 9 ms 9964 KB Output is correct
45 Correct 8 ms 9836 KB Output is correct
46 Correct 8 ms 9836 KB Output is correct
47 Correct 9 ms 9964 KB Output is correct
48 Correct 9 ms 9964 KB Output is correct
49 Correct 15 ms 10476 KB Output is correct
50 Correct 116 ms 17388 KB Output is correct
51 Correct 13 ms 10092 KB Output is correct
52 Correct 104 ms 16236 KB Output is correct
53 Correct 15 ms 10476 KB Output is correct
54 Correct 109 ms 16876 KB Output is correct
55 Correct 11 ms 10220 KB Output is correct
56 Correct 11 ms 10220 KB Output is correct
57 Correct 11 ms 10348 KB Output is correct
58 Correct 11 ms 10220 KB Output is correct
59 Correct 8 ms 9836 KB Output is correct
60 Correct 92 ms 14828 KB Output is correct
61 Correct 10 ms 9964 KB Output is correct
62 Correct 113 ms 17132 KB Output is correct
63 Correct 417 ms 44140 KB Output is correct
64 Correct 414 ms 44268 KB Output is correct
65 Correct 462 ms 44324 KB Output is correct
66 Incorrect 99 ms 14956 KB Output isn't correct
67 Halted 0 ms 0 KB -