oj.uz

Submission #841246

# Submission time Handle Problem Language Result Execution time Memory
841246 2023-09-01T12:02:42 Z Ahmed57 Making Friends on Joitter is Fun (JOI20_joitter2) C++17
100 / 100
 1340 ms 69380 KB 
#include <bits/stdc++.h>

using namespace std;
set<int> ch[100001],adj[100001],rev[100001];
long long ans = 0;
long long pr[100001],sz[100001];
queue<pair<int,int>> to;
void insertcon(int x,int y){
    adj[x].insert(y);
    rev[y].insert(x);
    if(adj[y].count(x))to.push({x,y});
}
int find(int x){
    if(x==pr[x])return x;
    return pr[x] = find(pr[x]);
}
int dsu_sz(int x){
    return ch[x].size()+adj[x].size()+rev[x].size();
}
void mergegroup(int a,int b){
    if(a==b)return ;
    if(dsu_sz(a)<dsu_sz(b))swap(a,b);
    ans+=sz[a]*ch[b].size()+sz[b]*ch[a].size();
    pr[b] = a;sz[a]+=sz[b];
    for(auto i:ch[b]){
        if(ch[a].count(i))ans-=sz[a];
        else ch[a].insert(i);
    }
    adj[a].erase(b);rev[b].erase(a);
    adj[b].erase(a);rev[a].erase(b);
    for(auto i:adj[b]){
        rev[i].erase(b);
        insertcon(a,i);
    }for(auto i:rev[b]){
        adj[i].erase(b);
        insertcon(i,a);
    }
}
int main(){
    int n,m;
    cin>>n>>m;
    for(int i = 1;i<=n;i++){
        pr[i] = i;
        sz[i] = 1;
        ch[i].insert(i);
    }
    for(int i = 0;i<m;i++){
        int a,b;cin>>a>>b;
        b = find(b);
        if(find(a)!=b&&!ch[b].count(a)){
            ch[b].insert(a);
            ans+=sz[b];
            a = find(a);
            insertcon(a,b);
            while(!to.empty()){
                int A = to.front().first;
                int B = to.front().second;
                mergegroup(find(A),find(B));
                to.pop();
            }
        }
        cout<<ans<<endl;
    }
}

Subtask #1
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 14292 KB Output is correct
2 Correct 6 ms 14292 KB Output is correct
3 Correct 7 ms 14292 KB Output is correct
4 Correct 7 ms 14292 KB Output is correct
5 Correct 7 ms 14420 KB Output is correct
6 Correct 6 ms 14292 KB Output is correct
7 Correct 10 ms 14420 KB Output is correct
8 Correct 11 ms 14420 KB Output is correct
9 Correct 10 ms 14420 KB Output is correct
10 Correct 7 ms 14292 KB Output is correct
11 Correct 8 ms 14396 KB Output is correct
12 Correct 9 ms 14292 KB Output is correct
13 Correct 7 ms 14292 KB Output is correct
14 Correct 8 ms 14292 KB Output is correct
15 Correct 7 ms 14292 KB Output is correct
16 Correct 7 ms 14420 KB Output is correct
17 Correct 7 ms 14292 KB Output is correct
18 Correct 7 ms 14292 KB Output is correct
19 Correct 7 ms 14420 KB Output is correct
20 Correct 7 ms 14420 KB Output is correct
21 Correct 10 ms 14420 KB Output is correct
22 Correct 7 ms 14420 KB Output is correct
23 Correct 8 ms 14420 KB Output is correct
24 Correct 9 ms 14420 KB Output is correct
25 Correct 10 ms 14420 KB Output is correct
26 Correct 7 ms 14420 KB Output is correct
27 Correct 8 ms 14420 KB Output is correct
28 Correct 7 ms 14420 KB Output is correct
29 Correct 8 ms 14436 KB Output is correct
30 Correct 8 ms 14292 KB Output is correct
31 Correct 9 ms 14540 KB Output is correct
32 Correct 7 ms 14420 KB Output is correct
33 Correct 9 ms 14420 KB Output is correct

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 14292 KB Output is correct
2 Correct 6 ms 14292 KB Output is correct
3 Correct 7 ms 14292 KB Output is correct
4 Correct 7 ms 14292 KB Output is correct
5 Correct 7 ms 14420 KB Output is correct
6 Correct 6 ms 14292 KB Output is correct
7 Correct 10 ms 14420 KB Output is correct
8 Correct 11 ms 14420 KB Output is correct
9 Correct 10 ms 14420 KB Output is correct
10 Correct 7 ms 14292 KB Output is correct
11 Correct 8 ms 14396 KB Output is correct
12 Correct 9 ms 14292 KB Output is correct
13 Correct 7 ms 14292 KB Output is correct
14 Correct 8 ms 14292 KB Output is correct
15 Correct 7 ms 14292 KB Output is correct
16 Correct 7 ms 14420 KB Output is correct
17 Correct 7 ms 14292 KB Output is correct
18 Correct 7 ms 14292 KB Output is correct
19 Correct 7 ms 14420 KB Output is correct
20 Correct 7 ms 14420 KB Output is correct
21 Correct 10 ms 14420 KB Output is correct
22 Correct 7 ms 14420 KB Output is correct
23 Correct 8 ms 14420 KB Output is correct
24 Correct 9 ms 14420 KB Output is correct
25 Correct 10 ms 14420 KB Output is correct
26 Correct 7 ms 14420 KB Output is correct
27 Correct 8 ms 14420 KB Output is correct
28 Correct 7 ms 14420 KB Output is correct
29 Correct 8 ms 14436 KB Output is correct
30 Correct 8 ms 14292 KB Output is correct
31 Correct 9 ms 14540 KB Output is correct
32 Correct 7 ms 14420 KB Output is correct
33 Correct 9 ms 14420 KB Output is correct
34 Correct 20 ms 14548 KB Output is correct
35 Correct 416 ms 20172 KB Output is correct
36 Correct 456 ms 23068 KB Output is correct
37 Correct 446 ms 23172 KB Output is correct
38 Correct 470 ms 22776 KB Output is correct
39 Correct 14 ms 14676 KB Output is correct
40 Correct 15 ms 15060 KB Output is correct
41 Correct 15 ms 15060 KB Output is correct
42 Correct 17 ms 14676 KB Output is correct
43 Correct 15 ms 14804 KB Output is correct
44 Correct 15 ms 14804 KB Output is correct
45 Correct 14 ms 14676 KB Output is correct
46 Correct 15 ms 14728 KB Output is correct
47 Correct 19 ms 14932 KB Output is correct
48 Correct 16 ms 14932 KB Output is correct
49 Correct 38 ms 15700 KB Output is correct
50 Correct 461 ms 23268 KB Output is correct
51 Correct 27 ms 15184 KB Output is correct
52 Correct 441 ms 21512 KB Output is correct
53 Correct 27 ms 15572 KB Output is correct
54 Correct 455 ms 22260 KB Output is correct
55 Correct 18 ms 15188 KB Output is correct
56 Correct 16 ms 15188 KB Output is correct
57 Correct 17 ms 15060 KB Output is correct
58 Correct 16 ms 15060 KB Output is correct
59 Correct 18 ms 15188 KB Output is correct
60 Correct 422 ms 20020 KB Output is correct
61 Correct 16 ms 14932 KB Output is correct
62 Correct 451 ms 22620 KB Output is correct

Subtask #3
83.0 / 83.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 14292 KB Output is correct
2 Correct 6 ms 14292 KB Output is correct
3 Correct 7 ms 14292 KB Output is correct
4 Correct 7 ms 14292 KB Output is correct
5 Correct 7 ms 14420 KB Output is correct
6 Correct 6 ms 14292 KB Output is correct
7 Correct 10 ms 14420 KB Output is correct
8 Correct 11 ms 14420 KB Output is correct
9 Correct 10 ms 14420 KB Output is correct
10 Correct 7 ms 14292 KB Output is correct
11 Correct 8 ms 14396 KB Output is correct
12 Correct 9 ms 14292 KB Output is correct
13 Correct 7 ms 14292 KB Output is correct
14 Correct 8 ms 14292 KB Output is correct
15 Correct 7 ms 14292 KB Output is correct
16 Correct 7 ms 14420 KB Output is correct
17 Correct 7 ms 14292 KB Output is correct
18 Correct 7 ms 14292 KB Output is correct
19 Correct 7 ms 14420 KB Output is correct
20 Correct 7 ms 14420 KB Output is correct
21 Correct 10 ms 14420 KB Output is correct
22 Correct 7 ms 14420 KB Output is correct
23 Correct 8 ms 14420 KB Output is correct
24 Correct 9 ms 14420 KB Output is correct
25 Correct 10 ms 14420 KB Output is correct
26 Correct 7 ms 14420 KB Output is correct
27 Correct 8 ms 14420 KB Output is correct
28 Correct 7 ms 14420 KB Output is correct
29 Correct 8 ms 14436 KB Output is correct
30 Correct 8 ms 14292 KB Output is correct
31 Correct 9 ms 14540 KB Output is correct
32 Correct 7 ms 14420 KB Output is correct
33 Correct 9 ms 14420 KB Output is correct
34 Correct 20 ms 14548 KB Output is correct
35 Correct 416 ms 20172 KB Output is correct
36 Correct 456 ms 23068 KB Output is correct
37 Correct 446 ms 23172 KB Output is correct
38 Correct 470 ms 22776 KB Output is correct
39 Correct 14 ms 14676 KB Output is correct
40 Correct 15 ms 15060 KB Output is correct
41 Correct 15 ms 15060 KB Output is correct
42 Correct 17 ms 14676 KB Output is correct
43 Correct 15 ms 14804 KB Output is correct
44 Correct 15 ms 14804 KB Output is correct
45 Correct 14 ms 14676 KB Output is correct
46 Correct 15 ms 14728 KB Output is correct
47 Correct 19 ms 14932 KB Output is correct
48 Correct 16 ms 14932 KB Output is correct
49 Correct 38 ms 15700 KB Output is correct
50 Correct 461 ms 23268 KB Output is correct
51 Correct 27 ms 15184 KB Output is correct
52 Correct 441 ms 21512 KB Output is correct
53 Correct 27 ms 15572 KB Output is correct
54 Correct 455 ms 22260 KB Output is correct
55 Correct 18 ms 15188 KB Output is correct
56 Correct 16 ms 15188 KB Output is correct
57 Correct 17 ms 15060 KB Output is correct
58 Correct 16 ms 15060 KB Output is correct
59 Correct 18 ms 15188 KB Output is correct
60 Correct 422 ms 20020 KB Output is correct
61 Correct 16 ms 14932 KB Output is correct
62 Correct 451 ms 22620 KB Output is correct
63 Correct 937 ms 68384 KB Output is correct
64 Correct 930 ms 68252 KB Output is correct
65 Correct 977 ms 68348 KB Output is correct
66 Correct 475 ms 34356 KB Output is correct
67 Correct 677 ms 61380 KB Output is correct
68 Correct 475 ms 34424 KB Output is correct
69 Correct 653 ms 35568 KB Output is correct
70 Correct 494 ms 34436 KB Output is correct
71 Correct 479 ms 34380 KB Output is correct
72 Correct 664 ms 45328 KB Output is correct
73 Correct 673 ms 47060 KB Output is correct
74 Correct 1340 ms 69004 KB Output is correct
75 Correct 920 ms 42272 KB Output is correct
76 Correct 1074 ms 54228 KB Output is correct
77 Correct 1145 ms 54520 KB Output is correct
78 Correct 422 ms 38024 KB Output is correct
79 Correct 750 ms 42404 KB Output is correct
80 Correct 406 ms 36812 KB Output is correct
81 Correct 703 ms 40492 KB Output is correct
82 Correct 993 ms 55012 KB Output is correct
83 Correct 960 ms 55064 KB Output is correct
84 Correct 789 ms 53692 KB Output is correct
85 Correct 814 ms 53828 KB Output is correct
86 Correct 575 ms 67212 KB Output is correct
87 Correct 721 ms 69380 KB Output is correct
88 Correct 634 ms 46284 KB Output is correct
89 Correct 1028 ms 52348 KB Output is correct