oj.uz

Submission #278592

# Submission time Handle Problem Language Result Execution time Memory
278592 2020-08-21T15:11:38 Z MKopchev Making Friends on Joitter is Fun (JOI20_joitter2) C++14
100 / 100
 2484 ms 69060 KB 
#include<bits/stdc++.h>
using namespace std;
const int nmax=1e5+42;

int n,m;
int parent[nmax],SZ[nmax];

int root(int node)
{
    if(node==parent[node])return node;
    parent[node]=root(parent[node]);
    return parent[node];
}

set< pair<int/*from*/,int/*to component*/> > all[nmax];
set< int > component[nmax];
set< pair<int/*from*/,int/*to*/> > edges_comp;

long long output=0;

int in[nmax];

long long score(int node)
{
    node=root(node);

    return 1LL*SZ[node]*(SZ[node]-1)/2*2+1LL*in[node]*SZ[node];
}
void add(int u,int v,bool special)
{
    /*
    cout<<"\n\n\n"<<endl;

    cout<<"add "<<u<<" "<<v<<" "<<output<<" "<<special<<endl;

    cout<<"edges_comp"<<endl;
    for(auto k:edges_comp)cout<<k.first<<" "<<k.second<<endl;

    for(int i=1;i<=n;i++)
    {
        cout<<i<<" -> "<<in[i]<<" "<<root(i)<<" "<<SZ[root(i)]<<endl;
        cout<<"all: "<<endl;
        for(auto j:all[i])cout<<j.first<<" "<<j.second<<endl;
        cout<<"component: ";for(auto k:component[i])cout<<k<<" ";cout<<endl;

        cout<<"---"<<endl;
    }
    */

    int u_root=root(u);
    int v_root=root(v);

    if(u_root==v_root)return;

    if(special==0&&all[u_root].count({u,v_root}))return;

    if(edges_comp.count({v_root,u_root})==0)//do not merge
    {
        if(all[u_root].count({u,v_root})==0)
        {
            output+=SZ[v_root];
            in[v_root]++;
        }
        all[u_root].insert({u,v_root});
        all[v_root].insert({u,v_root});

        edges_comp.insert({u_root,v_root});
        return;
    }

    if(SZ[u_root]<SZ[v_root])
    {
        swap(u_root,v_root);
        swap(u,v);
    }


    edges_comp.erase({u_root,v_root});
    edges_comp.erase({v_root,u_root});

    //cout<<u_root<<" "<<u<<" "<<v_root<<" "<<v<<endl;

    //merge
    output=output-score(u_root)-score(v_root);

    //cout<<"after sub "<<output<<endl;

    set< pair<int/*from*/,int/*to component*/> > mem_all=all[v_root];

    for(auto p:mem_all)
    {
        int where=-1;

        pair<int,int> k=p;

        //cout<<"moving "<<k.first<<" "<<k.second<<endl;

        if(k.second==v_root&&component[u_root].count(k.first))
        {
            all[u_root].erase({k.first,v_root});
            all[v_root].erase({k.first,v_root});

            in[v_root]--;

            where=1;
        }
        else if(k.second==v_root)
        {
            all[root(k.first)].erase(k);

            k.second=u_root;

            if(all[u_root].count(k)==0)in[u_root]++;

            all[u_root].insert(k);
            all[root(k.first)].insert(k);

            edges_comp.insert({root(k.first),u_root});
            edges_comp.erase({root(k.first),v_root});

            where=2;
        }

        else if(component[u_root].count(k.second)==0)
        {
            //if(all[u_root].count({u_root,root(k.second)})==0)output+=SZ[u_root];in[root(k.second)]++;

            all[u_root].insert({k.first,root(k.second)});
            all[root(k.second)].insert({k.first,root(k.second)});

            edges_comp.insert({u_root,root(k.second)});

            /*
            cout<<"Wrong "<<endl;
            system("pause");
            */

            where=3;
        }
        else
        {
            in[u_root]--;

            all[u_root].erase({k.first,u_root});
            all[v_root].erase({k.first,u_root});

            where=4;
        }

        //cout<<"where= "<<where<<" "<<in[u_root]<<endl;
    }

    all[v_root]={};
    in[v_root]=0;

    SZ[u_root]+=SZ[v_root];
    parent[v_root]=u_root;

    output+=score(u_root);

    //cout<<"after add "<<output<<endl;

    for(auto k:component[v_root])
        component[u_root].insert(k);
    component[v_root]={};

    for(auto k:mem_all)
        add(k.first,k.second,1);
}
int main()
{
    scanf("%i%i",&n,&m);

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

    for(int i=1;i<=m;i++)
    {
        int u,v;

        scanf("%i%i",&u,&v);

        add(u,v,0);

        printf("%lld\n",output);
    }
    return 0;
}

Compilation message

joitter2.cpp: In function 'void add(int, int, bool)':
joitter2.cpp:92:13: warning: variable 'where' set but not used [-Wunused-but-set-variable]
   92 |         int where=-1;
      |             ^~~~~
joitter2.cpp: In function 'int main()':
joitter2.cpp:172:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  172 |     scanf("%i%i",&n,&m);
      |     ~~~~~^~~~~~~~~~~~~~
joitter2.cpp:180:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  180 |         scanf("%i%i",&u,&v);
      |         ~~~~~^~~~~~~~~~~~~~

Subtask #1
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 9728 KB Output is correct
2 Correct 6 ms 9728 KB Output is correct
3 Correct 7 ms 9728 KB Output is correct
4 Correct 6 ms 9728 KB Output is correct
5 Correct 7 ms 9728 KB Output is correct
6 Correct 7 ms 9728 KB Output is correct
7 Correct 8 ms 9728 KB Output is correct
8 Correct 8 ms 9728 KB Output is correct
9 Correct 8 ms 9728 KB Output is correct
10 Correct 7 ms 9728 KB Output is correct
11 Correct 7 ms 9728 KB Output is correct
12 Correct 7 ms 9728 KB Output is correct
13 Correct 7 ms 9728 KB Output is correct
14 Correct 7 ms 9728 KB Output is correct
15 Correct 7 ms 9728 KB Output is correct
16 Correct 7 ms 9728 KB Output is correct
17 Correct 7 ms 9728 KB Output is correct
18 Correct 7 ms 9728 KB Output is correct
19 Correct 7 ms 9728 KB Output is correct
20 Correct 7 ms 9760 KB Output is correct
21 Correct 8 ms 9728 KB Output is correct
22 Correct 7 ms 9728 KB Output is correct
23 Correct 7 ms 9728 KB Output is correct
24 Correct 7 ms 9728 KB Output is correct
25 Correct 8 ms 9728 KB Output is correct
26 Correct 7 ms 9728 KB Output is correct
27 Correct 7 ms 9728 KB Output is correct
28 Correct 7 ms 9728 KB Output is correct
29 Correct 7 ms 9728 KB Output is correct
30 Correct 7 ms 9728 KB Output is correct
31 Correct 8 ms 9728 KB Output is correct
32 Correct 7 ms 9728 KB Output is correct
33 Correct 8 ms 9728 KB Output is correct

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 9728 KB Output is correct
2 Correct 6 ms 9728 KB Output is correct
3 Correct 7 ms 9728 KB Output is correct
4 Correct 6 ms 9728 KB Output is correct
5 Correct 7 ms 9728 KB Output is correct
6 Correct 7 ms 9728 KB Output is correct
7 Correct 8 ms 9728 KB Output is correct
8 Correct 8 ms 9728 KB Output is correct
9 Correct 8 ms 9728 KB Output is correct
10 Correct 7 ms 9728 KB Output is correct
11 Correct 7 ms 9728 KB Output is correct
12 Correct 7 ms 9728 KB Output is correct
13 Correct 7 ms 9728 KB Output is correct
14 Correct 7 ms 9728 KB Output is correct
15 Correct 7 ms 9728 KB Output is correct
16 Correct 7 ms 9728 KB Output is correct
17 Correct 7 ms 9728 KB Output is correct
18 Correct 7 ms 9728 KB Output is correct
19 Correct 7 ms 9728 KB Output is correct
20 Correct 7 ms 9760 KB Output is correct
21 Correct 8 ms 9728 KB Output is correct
22 Correct 7 ms 9728 KB Output is correct
23 Correct 7 ms 9728 KB Output is correct
24 Correct 7 ms 9728 KB Output is correct
25 Correct 8 ms 9728 KB Output is correct
26 Correct 7 ms 9728 KB Output is correct
27 Correct 7 ms 9728 KB Output is correct
28 Correct 7 ms 9728 KB Output is correct
29 Correct 7 ms 9728 KB Output is correct
30 Correct 7 ms 9728 KB Output is correct
31 Correct 8 ms 9728 KB Output is correct
32 Correct 7 ms 9728 KB Output is correct
33 Correct 8 ms 9728 KB Output is correct
34 Correct 11 ms 9856 KB Output is correct
35 Correct 137 ms 13908 KB Output is correct
36 Correct 190 ms 16248 KB Output is correct
37 Correct 212 ms 16248 KB Output is correct
38 Correct 189 ms 15740 KB Output is correct
39 Correct 12 ms 9856 KB Output is correct
40 Correct 14 ms 9984 KB Output is correct
41 Correct 14 ms 9984 KB Output is correct
42 Correct 10 ms 9856 KB Output is correct
43 Correct 12 ms 9984 KB Output is correct
44 Correct 12 ms 9984 KB Output is correct
45 Correct 12 ms 9856 KB Output is correct
46 Correct 10 ms 9888 KB Output is correct
47 Correct 14 ms 9984 KB Output is correct
48 Correct 14 ms 9984 KB Output is correct
49 Correct 31 ms 10872 KB Output is correct
50 Correct 205 ms 16164 KB Output is correct
51 Correct 20 ms 10240 KB Output is correct
52 Correct 152 ms 14456 KB Output is correct
53 Correct 28 ms 10752 KB Output is correct
54 Correct 168 ms 15480 KB Output is correct
55 Correct 19 ms 10368 KB Output is correct
56 Correct 19 ms 10368 KB Output is correct
57 Correct 19 ms 10880 KB Output is correct
58 Correct 22 ms 10880 KB Output is correct
59 Correct 11 ms 9984 KB Output is correct
60 Correct 124 ms 12248 KB Output is correct
61 Correct 16 ms 10112 KB Output is correct
62 Correct 177 ms 15592 KB Output is correct

Subtask #3
83.0 / 83.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 9728 KB Output is correct
2 Correct 6 ms 9728 KB Output is correct
3 Correct 7 ms 9728 KB Output is correct
4 Correct 6 ms 9728 KB Output is correct
5 Correct 7 ms 9728 KB Output is correct
6 Correct 7 ms 9728 KB Output is correct
7 Correct 8 ms 9728 KB Output is correct
8 Correct 8 ms 9728 KB Output is correct
9 Correct 8 ms 9728 KB Output is correct
10 Correct 7 ms 9728 KB Output is correct
11 Correct 7 ms 9728 KB Output is correct
12 Correct 7 ms 9728 KB Output is correct
13 Correct 7 ms 9728 KB Output is correct
14 Correct 7 ms 9728 KB Output is correct
15 Correct 7 ms 9728 KB Output is correct
16 Correct 7 ms 9728 KB Output is correct
17 Correct 7 ms 9728 KB Output is correct
18 Correct 7 ms 9728 KB Output is correct
19 Correct 7 ms 9728 KB Output is correct
20 Correct 7 ms 9760 KB Output is correct
21 Correct 8 ms 9728 KB Output is correct
22 Correct 7 ms 9728 KB Output is correct
23 Correct 7 ms 9728 KB Output is correct
24 Correct 7 ms 9728 KB Output is correct
25 Correct 8 ms 9728 KB Output is correct
26 Correct 7 ms 9728 KB Output is correct
27 Correct 7 ms 9728 KB Output is correct
28 Correct 7 ms 9728 KB Output is correct
29 Correct 7 ms 9728 KB Output is correct
30 Correct 7 ms 9728 KB Output is correct
31 Correct 8 ms 9728 KB Output is correct
32 Correct 7 ms 9728 KB Output is correct
33 Correct 8 ms 9728 KB Output is correct
34 Correct 11 ms 9856 KB Output is correct
35 Correct 137 ms 13908 KB Output is correct
36 Correct 190 ms 16248 KB Output is correct
37 Correct 212 ms 16248 KB Output is correct
38 Correct 189 ms 15740 KB Output is correct
39 Correct 12 ms 9856 KB Output is correct
40 Correct 14 ms 9984 KB Output is correct
41 Correct 14 ms 9984 KB Output is correct
42 Correct 10 ms 9856 KB Output is correct
43 Correct 12 ms 9984 KB Output is correct
44 Correct 12 ms 9984 KB Output is correct
45 Correct 12 ms 9856 KB Output is correct
46 Correct 10 ms 9888 KB Output is correct
47 Correct 14 ms 9984 KB Output is correct
48 Correct 14 ms 9984 KB Output is correct
49 Correct 31 ms 10872 KB Output is correct
50 Correct 205 ms 16164 KB Output is correct
51 Correct 20 ms 10240 KB Output is correct
52 Correct 152 ms 14456 KB Output is correct
53 Correct 28 ms 10752 KB Output is correct
54 Correct 168 ms 15480 KB Output is correct
55 Correct 19 ms 10368 KB Output is correct
56 Correct 19 ms 10368 KB Output is correct
57 Correct 19 ms 10880 KB Output is correct
58 Correct 22 ms 10880 KB Output is correct
59 Correct 11 ms 9984 KB Output is correct
60 Correct 124 ms 12248 KB Output is correct
61 Correct 16 ms 10112 KB Output is correct
62 Correct 177 ms 15592 KB Output is correct
63 Correct 1114 ms 60140 KB Output is correct
64 Correct 1063 ms 59896 KB Output is correct
65 Correct 1092 ms 59896 KB Output is correct
66 Correct 277 ms 19576 KB Output is correct
67 Correct 990 ms 26696 KB Output is correct
68 Correct 270 ms 20088 KB Output is correct
69 Correct 700 ms 27192 KB Output is correct
70 Correct 280 ms 20088 KB Output is correct
71 Correct 295 ms 20088 KB Output is correct
72 Correct 954 ms 27256 KB Output is correct
73 Correct 997 ms 27060 KB Output is correct
74 Correct 2484 ms 44996 KB Output is correct
75 Correct 1212 ms 33272 KB Output is correct
76 Correct 2009 ms 40952 KB Output is correct
77 Correct 1996 ms 41128 KB Output is correct
78 Correct 505 ms 25876 KB Output is correct
79 Correct 844 ms 29440 KB Output is correct
80 Correct 393 ms 27040 KB Output is correct
81 Correct 700 ms 30368 KB Output is correct
82 Correct 2070 ms 47548 KB Output is correct
83 Correct 1935 ms 47448 KB Output is correct
84 Correct 1661 ms 69060 KB Output is correct
85 Correct 1591 ms 69056 KB Output is correct
86 Correct 384 ms 20856 KB Output is correct
87 Correct 442 ms 23012 KB Output is correct
88 Correct 1010 ms 26992 KB Output is correct
89 Correct 1899 ms 38788 KB Output is correct