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답안 #382282

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
382282 2021-03-26T23:09:07 Z couplefire 조이터에서 친구를 만드는건 재밌어 (JOI20_joitter2) C++17
100 / 100
 1099 ms 73244 KB 
#include <bits/stdc++.h>
#define pii pair<int, int>
#define x first
#define y second
 
using namespace std;
 
const int N = 1e5 + 10;
set<int> in[N], out[N], com[N], e[N];
long long ans;
long long par[N], sz[N];
int n, m;
 
int find( int u ) { return par[u] == u ? u : par[u] = find( par[u] ); }
 
long long cal( int u ) { return 1LL * ( ( ( int )e[u].size() - sz[u] ) * sz[u] ) + 1LL * sz[u] * ( sz[u]-1 ); }
 
void merge( int a, int b ) {
    vector<pii> v;
    a = find( a ), b = find( b );
    if( a == b ) return ;
    if( in[a].size() + out[a].size() + e[a].size() < in[b].size() + out[b].size() + e[b].size() ) swap( a, b );
    ans -= cal( a ), ans -= cal( b );
    in[a].erase( b ), in[b].erase( a ), out[a].erase( b ), out[b].erase( a );
    for( int x : in[b] ) {
        if( out[a].count( x ) ) v.emplace_back( x, a );
        out[x].erase( b ), out[x].emplace( a );
    }
    for( int x : out[b] ) {
        if( in[a].count( x ) ) v.emplace_back( x, a );
        in[x].erase( b ), in[x].emplace( a );
    }
    for( int x : in[b] ) in[a].emplace( x );
    for( int x : out[b] ) out[a].emplace( x );
    for( int x : e[b] ) e[a].emplace( x );
    in[b].clear(), out[b].clear(), e[b].clear();
    sz[a] += sz[b], par[b] = a;
    ans += cal( a );
    for( pii x : v ) merge( x.x, x.y ); 
}
 
int main()
{
    scanf("%d %d",&n,&m);
    iota( par, par + N, 0 ), fill( sz, sz + N, 1 );
    for( int i = 1 ; i <= n ; i++ ) e[i].emplace( i );
    while( m-- ) {
        int u, v;
        scanf("%d %d",&u,&v);
        int a = find( u ), b = find( v );
        if( out[b].count( a ) ) merge( u, v );
        else {
            ans -= cal( b );
            in[b].emplace( a ), out[a].emplace( b );
            e[b].emplace( u );
            ans += cal( b );
        }
        printf("%lld\n",ans);
    }
    return 0;
}

Compilation message

joitter2.cpp: In function 'int main()':
joitter2.cpp:44:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   44 |     scanf("%d %d",&n,&m);
      |     ~~~~~^~~~~~~~~~~~~~~
joitter2.cpp:49:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   49 |         scanf("%d %d",&u,&v);
      |         ~~~~~^~~~~~~~~~~~~~~

Subtask #1
1.0 / 1.0

# 결과 실행 시간 메모리 Grader output
1 Correct 14 ms 20716 KB Output is correct
2 Correct 14 ms 20716 KB Output is correct
3 Correct 14 ms 20716 KB Output is correct
4 Correct 13 ms 20716 KB Output is correct
5 Correct 14 ms 20716 KB Output is correct
6 Correct 13 ms 20736 KB Output is correct
7 Correct 15 ms 20716 KB Output is correct
8 Correct 14 ms 20716 KB Output is correct
9 Correct 14 ms 20716 KB Output is correct
10 Correct 14 ms 20736 KB Output is correct
11 Correct 14 ms 20716 KB Output is correct
12 Correct 14 ms 20716 KB Output is correct
13 Correct 14 ms 20736 KB Output is correct
14 Correct 14 ms 20728 KB Output is correct
15 Correct 14 ms 20716 KB Output is correct
16 Correct 14 ms 20716 KB Output is correct
17 Correct 14 ms 20716 KB Output is correct
18 Correct 14 ms 20844 KB Output is correct
19 Correct 14 ms 20716 KB Output is correct
20 Correct 14 ms 20736 KB Output is correct
21 Correct 15 ms 20716 KB Output is correct
22 Correct 14 ms 20716 KB Output is correct
23 Correct 15 ms 20716 KB Output is correct
24 Correct 14 ms 20716 KB Output is correct
25 Correct 14 ms 20716 KB Output is correct
26 Correct 14 ms 20716 KB Output is correct
27 Correct 14 ms 20716 KB Output is correct
28 Correct 14 ms 20716 KB Output is correct
29 Correct 13 ms 20716 KB Output is correct
30 Correct 14 ms 20716 KB Output is correct
31 Correct 15 ms 20716 KB Output is correct
32 Correct 14 ms 20716 KB Output is correct
33 Correct 14 ms 20716 KB Output is correct

Subtask #2
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 14 ms 20716 KB Output is correct
2 Correct 14 ms 20716 KB Output is correct
3 Correct 14 ms 20716 KB Output is correct
4 Correct 13 ms 20716 KB Output is correct
5 Correct 14 ms 20716 KB Output is correct
6 Correct 13 ms 20736 KB Output is correct
7 Correct 15 ms 20716 KB Output is correct
8 Correct 14 ms 20716 KB Output is correct
9 Correct 14 ms 20716 KB Output is correct
10 Correct 14 ms 20736 KB Output is correct
11 Correct 14 ms 20716 KB Output is correct
12 Correct 14 ms 20716 KB Output is correct
13 Correct 14 ms 20736 KB Output is correct
14 Correct 14 ms 20728 KB Output is correct
15 Correct 14 ms 20716 KB Output is correct
16 Correct 14 ms 20716 KB Output is correct
17 Correct 14 ms 20716 KB Output is correct
18 Correct 14 ms 20844 KB Output is correct
19 Correct 14 ms 20716 KB Output is correct
20 Correct 14 ms 20736 KB Output is correct
21 Correct 15 ms 20716 KB Output is correct
22 Correct 14 ms 20716 KB Output is correct
23 Correct 15 ms 20716 KB Output is correct
24 Correct 14 ms 20716 KB Output is correct
25 Correct 14 ms 20716 KB Output is correct
26 Correct 14 ms 20716 KB Output is correct
27 Correct 14 ms 20716 KB Output is correct
28 Correct 14 ms 20716 KB Output is correct
29 Correct 13 ms 20716 KB Output is correct
30 Correct 14 ms 20716 KB Output is correct
31 Correct 15 ms 20716 KB Output is correct
32 Correct 14 ms 20716 KB Output is correct
33 Correct 14 ms 20716 KB Output is correct
34 Correct 18 ms 20844 KB Output is correct
35 Correct 130 ms 26528 KB Output is correct
36 Correct 157 ms 29420 KB Output is correct
37 Correct 165 ms 29548 KB Output is correct
38 Correct 185 ms 29164 KB Output is correct
39 Correct 17 ms 20844 KB Output is correct
40 Correct 18 ms 21100 KB Output is correct
41 Correct 17 ms 20972 KB Output is correct
42 Correct 16 ms 20844 KB Output is correct
43 Correct 17 ms 20972 KB Output is correct
44 Correct 17 ms 20972 KB Output is correct
45 Correct 16 ms 20844 KB Output is correct
46 Correct 16 ms 20844 KB Output is correct
47 Correct 18 ms 20972 KB Output is correct
48 Correct 17 ms 20972 KB Output is correct
49 Correct 26 ms 21740 KB Output is correct
50 Correct 159 ms 29548 KB Output is correct
51 Correct 22 ms 21228 KB Output is correct
52 Correct 145 ms 27884 KB Output is correct
53 Correct 24 ms 21740 KB Output is correct
54 Correct 152 ms 28800 KB Output is correct
55 Correct 20 ms 21356 KB Output is correct
56 Correct 20 ms 21356 KB Output is correct
57 Correct 21 ms 21740 KB Output is correct
58 Correct 21 ms 21740 KB Output is correct
59 Correct 17 ms 20844 KB Output is correct
60 Correct 125 ms 25784 KB Output is correct
61 Correct 20 ms 20972 KB Output is correct
62 Correct 159 ms 29036 KB Output is correct

Subtask #3
83.0 / 83.0

# 결과 실행 시간 메모리 Grader output
1 Correct 14 ms 20716 KB Output is correct
2 Correct 14 ms 20716 KB Output is correct
3 Correct 14 ms 20716 KB Output is correct
4 Correct 13 ms 20716 KB Output is correct
5 Correct 14 ms 20716 KB Output is correct
6 Correct 13 ms 20736 KB Output is correct
7 Correct 15 ms 20716 KB Output is correct
8 Correct 14 ms 20716 KB Output is correct
9 Correct 14 ms 20716 KB Output is correct
10 Correct 14 ms 20736 KB Output is correct
11 Correct 14 ms 20716 KB Output is correct
12 Correct 14 ms 20716 KB Output is correct
13 Correct 14 ms 20736 KB Output is correct
14 Correct 14 ms 20728 KB Output is correct
15 Correct 14 ms 20716 KB Output is correct
16 Correct 14 ms 20716 KB Output is correct
17 Correct 14 ms 20716 KB Output is correct
18 Correct 14 ms 20844 KB Output is correct
19 Correct 14 ms 20716 KB Output is correct
20 Correct 14 ms 20736 KB Output is correct
21 Correct 15 ms 20716 KB Output is correct
22 Correct 14 ms 20716 KB Output is correct
23 Correct 15 ms 20716 KB Output is correct
24 Correct 14 ms 20716 KB Output is correct
25 Correct 14 ms 20716 KB Output is correct
26 Correct 14 ms 20716 KB Output is correct
27 Correct 14 ms 20716 KB Output is correct
28 Correct 14 ms 20716 KB Output is correct
29 Correct 13 ms 20716 KB Output is correct
30 Correct 14 ms 20716 KB Output is correct
31 Correct 15 ms 20716 KB Output is correct
32 Correct 14 ms 20716 KB Output is correct
33 Correct 14 ms 20716 KB Output is correct
34 Correct 18 ms 20844 KB Output is correct
35 Correct 130 ms 26528 KB Output is correct
36 Correct 157 ms 29420 KB Output is correct
37 Correct 165 ms 29548 KB Output is correct
38 Correct 185 ms 29164 KB Output is correct
39 Correct 17 ms 20844 KB Output is correct
40 Correct 18 ms 21100 KB Output is correct
41 Correct 17 ms 20972 KB Output is correct
42 Correct 16 ms 20844 KB Output is correct
43 Correct 17 ms 20972 KB Output is correct
44 Correct 17 ms 20972 KB Output is correct
45 Correct 16 ms 20844 KB Output is correct
46 Correct 16 ms 20844 KB Output is correct
47 Correct 18 ms 20972 KB Output is correct
48 Correct 17 ms 20972 KB Output is correct
49 Correct 26 ms 21740 KB Output is correct
50 Correct 159 ms 29548 KB Output is correct
51 Correct 22 ms 21228 KB Output is correct
52 Correct 145 ms 27884 KB Output is correct
53 Correct 24 ms 21740 KB Output is correct
54 Correct 152 ms 28800 KB Output is correct
55 Correct 20 ms 21356 KB Output is correct
56 Correct 20 ms 21356 KB Output is correct
57 Correct 21 ms 21740 KB Output is correct
58 Correct 21 ms 21740 KB Output is correct
59 Correct 17 ms 20844 KB Output is correct
60 Correct 125 ms 25784 KB Output is correct
61 Correct 20 ms 20972 KB Output is correct
62 Correct 159 ms 29036 KB Output is correct
63 Correct 610 ms 73244 KB Output is correct
64 Correct 607 ms 73116 KB Output is correct
65 Correct 604 ms 73068 KB Output is correct
66 Correct 221 ms 29804 KB Output is correct
67 Correct 495 ms 36204 KB Output is correct
68 Correct 215 ms 29932 KB Output is correct
69 Correct 466 ms 36908 KB Output is correct
70 Correct 247 ms 29856 KB Output is correct
71 Correct 254 ms 29932 KB Output is correct
72 Correct 475 ms 36332 KB Output is correct
73 Correct 480 ms 36204 KB Output is correct
74 Correct 1099 ms 48536 KB Output is correct
75 Correct 714 ms 42732 KB Output is correct
76 Correct 834 ms 47724 KB Output is correct
77 Correct 833 ms 47724 KB Output is correct
78 Correct 276 ms 35692 KB Output is correct
79 Correct 525 ms 39020 KB Output is correct
80 Correct 256 ms 35692 KB Output is correct
81 Correct 448 ms 39160 KB Output is correct
82 Correct 863 ms 57216 KB Output is correct
83 Correct 862 ms 57324 KB Output is correct
84 Correct 823 ms 71312 KB Output is correct
85 Correct 849 ms 71440 KB Output is correct
86 Correct 326 ms 30776 KB Output is correct
87 Correct 400 ms 33004 KB Output is correct
88 Correct 485 ms 36332 KB Output is correct
89 Correct 832 ms 46828 KB Output is correct