oj.uz

답안 #234928

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
234928 2020-05-26T09:56:09 Z AlexLuchianov 조이터에서 친구를 만드는건 재밌어 (JOI20_joitter2) C++14
100 / 100
 2866 ms 188528 KB 
#include <iostream>
#include <vector>
#include <algorithm>
#include <set>

using namespace std;

using ll = long long;

#define MIN(a, b) (((a) < (b)) ? (a) : (b))
#define MAX(a, b) (((a) < (b)) ? (b) : (a))

int const nmax = 300000;
int v[1 + nmax][2];

ll total = 0;

void _add(set<int> &myset1, set<int> &myset2){
  if(myset1.size() < myset2.size())
    swap(myset1, myset2);
  for(set<int>::iterator it = myset2.begin(); it != myset2.end(); it++)
    myset1.insert(*it);
}

namespace Dsu{
  vector<int> mult;
  vector<int> sz;
  set<int> followers[1 + nmax];

  void initialize(int n){
    mult.resize(1 + n);
    sz.resize(1 + n);
    for(int i = 1;i <= n; i++) {
      mult[i] = i;
      sz[i] = 1;
      followers[i].insert(i);
    }
  }

  int jump(int gala){
    if(mult[gala] != gala)
      mult[gala] = jump(mult[gala]);
    return mult[gala];
  }

  ll extract(int gala){
    return 1LL * sz[gala] * followers[gala].size();
  }

  void unite(int gala, int galb){
    gala = jump(gala);
    galb = jump(galb);
    if(gala == galb)
      return ;
    if(sz[galb] < sz[gala])
      swap(gala, galb);
    total += - extract(gala) - extract(galb);
    sz[galb] += sz[gala];
    mult[gala] = galb;
    _add(followers[galb], followers[gala]);
    total += extract(galb);
  }

  void addfollow(int x, int y){
    y = jump(y);
    total -= extract(y);
    followers[y].insert(x);
    total += extract(y);
  }
}

namespace Dsu2{
  vector<int> mult;
  set<int> adj[1 + nmax];
  set<pair<int,int>> freq;

  void initialize(int n){
    mult.resize(1 + n);
    for(int i = 1; i <= n; i++)
      mult[i] = i;
  }

  int jump(int gala) {
    if(mult[gala] != gala)
      mult[gala] = jump(mult[gala]);
    return mult[gala];
  }

  vector<int> st;

  void unite(int gala, int galb){
    gala = jump(gala);
    galb = jump(galb);
    if(gala == galb)
      return ;
    Dsu::unite(gala, galb);
    if(adj[galb].size() < adj[gala].size())
      swap(gala, galb);
    for(set<int>::iterator it = adj[gala].begin(); it != adj[gala].end(); it++)
      st.push_back(*it);
    _add(adj[galb], adj[gala]);
    mult[gala] = galb;
  }

  void refresh(){
    while(0 < st.size()){
      int id = st.back();
      int x = jump(v[id][0]);
      int y = jump(v[id][1]);
      adj[x].insert(id);
      adj[y].insert(id);

      freq.insert({x, y});
      st.pop_back();

      if(freq.find({y, x}) != freq.end())
        unite(x, y);
    }
  }
}

void activate(int id){
  int x = v[id][0];
  int y = v[id][1];
  Dsu::addfollow(x, y);
  Dsu2::st.push_back(id);
  Dsu2::refresh();
}

int main()
{
  ios::sync_with_stdio(0);
  cin.tie(0);

  int n, q;
  cin >> n >> q;
  total = n;
  for(int i = 1;i <= q; i++)
    cin >> v[i][0] >> v[i][1];
  Dsu::initialize(n);
  Dsu2::initialize(n);

  for(int i = 1;i <= q; i++){
    activate(i);
    cout << total - n<< '\n';
  }
  return 0;
}

Subtask #1
1.0 / 1.0

# 결과 실행 시간 메모리 Grader output
1 Correct 20 ms 28544 KB Output is correct
2 Correct 20 ms 28544 KB Output is correct
3 Correct 20 ms 28544 KB Output is correct
4 Correct 20 ms 28544 KB Output is correct
5 Correct 20 ms 28672 KB Output is correct
6 Correct 20 ms 28544 KB Output is correct
7 Correct 22 ms 28672 KB Output is correct
8 Correct 22 ms 28672 KB Output is correct
9 Correct 22 ms 28672 KB Output is correct
10 Correct 21 ms 28544 KB Output is correct
11 Correct 20 ms 28544 KB Output is correct
12 Correct 20 ms 28544 KB Output is correct
13 Correct 21 ms 28544 KB Output is correct
14 Correct 23 ms 28544 KB Output is correct
15 Correct 20 ms 28544 KB Output is correct
16 Correct 20 ms 28544 KB Output is correct
17 Correct 20 ms 28544 KB Output is correct
18 Correct 20 ms 28544 KB Output is correct
19 Correct 20 ms 28544 KB Output is correct
20 Correct 21 ms 28544 KB Output is correct
21 Correct 22 ms 28672 KB Output is correct
22 Correct 21 ms 28544 KB Output is correct
23 Correct 22 ms 28672 KB Output is correct
24 Correct 20 ms 28544 KB Output is correct
25 Correct 16 ms 28672 KB Output is correct
26 Correct 20 ms 28544 KB Output is correct
27 Correct 20 ms 28544 KB Output is correct
28 Correct 20 ms 28544 KB Output is correct
29 Correct 20 ms 28544 KB Output is correct
30 Correct 21 ms 28544 KB Output is correct
31 Correct 21 ms 28672 KB Output is correct
32 Correct 20 ms 28544 KB Output is correct
33 Correct 23 ms 28672 KB Output is correct

Subtask #2
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 20 ms 28544 KB Output is correct
2 Correct 20 ms 28544 KB Output is correct
3 Correct 20 ms 28544 KB Output is correct
4 Correct 20 ms 28544 KB Output is correct
5 Correct 20 ms 28672 KB Output is correct
6 Correct 20 ms 28544 KB Output is correct
7 Correct 22 ms 28672 KB Output is correct
8 Correct 22 ms 28672 KB Output is correct
9 Correct 22 ms 28672 KB Output is correct
10 Correct 21 ms 28544 KB Output is correct
11 Correct 20 ms 28544 KB Output is correct
12 Correct 20 ms 28544 KB Output is correct
13 Correct 21 ms 28544 KB Output is correct
14 Correct 23 ms 28544 KB Output is correct
15 Correct 20 ms 28544 KB Output is correct
16 Correct 20 ms 28544 KB Output is correct
17 Correct 20 ms 28544 KB Output is correct
18 Correct 20 ms 28544 KB Output is correct
19 Correct 20 ms 28544 KB Output is correct
20 Correct 21 ms 28544 KB Output is correct
21 Correct 22 ms 28672 KB Output is correct
22 Correct 21 ms 28544 KB Output is correct
23 Correct 22 ms 28672 KB Output is correct
24 Correct 20 ms 28544 KB Output is correct
25 Correct 16 ms 28672 KB Output is correct
26 Correct 20 ms 28544 KB Output is correct
27 Correct 20 ms 28544 KB Output is correct
28 Correct 20 ms 28544 KB Output is correct
29 Correct 20 ms 28544 KB Output is correct
30 Correct 21 ms 28544 KB Output is correct
31 Correct 21 ms 28672 KB Output is correct
32 Correct 20 ms 28544 KB Output is correct
33 Correct 23 ms 28672 KB Output is correct
34 Correct 26 ms 29184 KB Output is correct
35 Correct 289 ms 51064 KB Output is correct
36 Correct 351 ms 55288 KB Output is correct
37 Correct 356 ms 55160 KB Output is correct
38 Correct 353 ms 54648 KB Output is correct
39 Correct 26 ms 29440 KB Output is correct
40 Correct 34 ms 30584 KB Output is correct
41 Correct 35 ms 30584 KB Output is correct
42 Correct 27 ms 29560 KB Output is correct
43 Correct 28 ms 29568 KB Output is correct
44 Correct 28 ms 29568 KB Output is correct
45 Correct 28 ms 29440 KB Output is correct
46 Correct 27 ms 29440 KB Output is correct
47 Correct 33 ms 30072 KB Output is correct
48 Correct 33 ms 30200 KB Output is correct
49 Correct 47 ms 31224 KB Output is correct
50 Correct 349 ms 55284 KB Output is correct
51 Correct 37 ms 30336 KB Output is correct
52 Correct 337 ms 52960 KB Output is correct
53 Correct 45 ms 30976 KB Output is correct
54 Correct 339 ms 54136 KB Output is correct
55 Correct 33 ms 29952 KB Output is correct
56 Correct 31 ms 29952 KB Output is correct
57 Correct 31 ms 29952 KB Output is correct
58 Correct 31 ms 29952 KB Output is correct
59 Correct 34 ms 30848 KB Output is correct
60 Correct 270 ms 51960 KB Output is correct
61 Correct 32 ms 30080 KB Output is correct
62 Correct 342 ms 54520 KB Output is correct

Subtask #3
83.0 / 83.0

# 결과 실행 시간 메모리 Grader output
1 Correct 20 ms 28544 KB Output is correct
2 Correct 20 ms 28544 KB Output is correct
3 Correct 20 ms 28544 KB Output is correct
4 Correct 20 ms 28544 KB Output is correct
5 Correct 20 ms 28672 KB Output is correct
6 Correct 20 ms 28544 KB Output is correct
7 Correct 22 ms 28672 KB Output is correct
8 Correct 22 ms 28672 KB Output is correct
9 Correct 22 ms 28672 KB Output is correct
10 Correct 21 ms 28544 KB Output is correct
11 Correct 20 ms 28544 KB Output is correct
12 Correct 20 ms 28544 KB Output is correct
13 Correct 21 ms 28544 KB Output is correct
14 Correct 23 ms 28544 KB Output is correct
15 Correct 20 ms 28544 KB Output is correct
16 Correct 20 ms 28544 KB Output is correct
17 Correct 20 ms 28544 KB Output is correct
18 Correct 20 ms 28544 KB Output is correct
19 Correct 20 ms 28544 KB Output is correct
20 Correct 21 ms 28544 KB Output is correct
21 Correct 22 ms 28672 KB Output is correct
22 Correct 21 ms 28544 KB Output is correct
23 Correct 22 ms 28672 KB Output is correct
24 Correct 20 ms 28544 KB Output is correct
25 Correct 16 ms 28672 KB Output is correct
26 Correct 20 ms 28544 KB Output is correct
27 Correct 20 ms 28544 KB Output is correct
28 Correct 20 ms 28544 KB Output is correct
29 Correct 20 ms 28544 KB Output is correct
30 Correct 21 ms 28544 KB Output is correct
31 Correct 21 ms 28672 KB Output is correct
32 Correct 20 ms 28544 KB Output is correct
33 Correct 23 ms 28672 KB Output is correct
34 Correct 26 ms 29184 KB Output is correct
35 Correct 289 ms 51064 KB Output is correct
36 Correct 351 ms 55288 KB Output is correct
37 Correct 356 ms 55160 KB Output is correct
38 Correct 353 ms 54648 KB Output is correct
39 Correct 26 ms 29440 KB Output is correct
40 Correct 34 ms 30584 KB Output is correct
41 Correct 35 ms 30584 KB Output is correct
42 Correct 27 ms 29560 KB Output is correct
43 Correct 28 ms 29568 KB Output is correct
44 Correct 28 ms 29568 KB Output is correct
45 Correct 28 ms 29440 KB Output is correct
46 Correct 27 ms 29440 KB Output is correct
47 Correct 33 ms 30072 KB Output is correct
48 Correct 33 ms 30200 KB Output is correct
49 Correct 47 ms 31224 KB Output is correct
50 Correct 349 ms 55284 KB Output is correct
51 Correct 37 ms 30336 KB Output is correct
52 Correct 337 ms 52960 KB Output is correct
53 Correct 45 ms 30976 KB Output is correct
54 Correct 339 ms 54136 KB Output is correct
55 Correct 33 ms 29952 KB Output is correct
56 Correct 31 ms 29952 KB Output is correct
57 Correct 31 ms 29952 KB Output is correct
58 Correct 31 ms 29952 KB Output is correct
59 Correct 34 ms 30848 KB Output is correct
60 Correct 270 ms 51960 KB Output is correct
61 Correct 32 ms 30080 KB Output is correct
62 Correct 342 ms 54520 KB Output is correct
63 Correct 1094 ms 98876 KB Output is correct
64 Correct 1099 ms 98552 KB Output is correct
65 Correct 1086 ms 98808 KB Output is correct
66 Correct 640 ms 78104 KB Output is correct
67 Correct 1661 ms 156392 KB Output is correct
68 Correct 608 ms 78200 KB Output is correct
69 Correct 986 ms 78200 KB Output is correct
70 Correct 684 ms 78232 KB Output is correct
71 Correct 716 ms 78164 KB Output is correct
72 Correct 1626 ms 108116 KB Output is correct
73 Correct 1594 ms 113184 KB Output is correct
74 Correct 2866 ms 151260 KB Output is correct
75 Correct 1510 ms 93920 KB Output is correct
76 Correct 2297 ms 119172 KB Output is correct
77 Correct 2250 ms 119416 KB Output is correct
78 Correct 511 ms 71292 KB Output is correct
79 Correct 1149 ms 92640 KB Output is correct
80 Correct 524 ms 70308 KB Output is correct
81 Correct 1126 ms 89716 KB Output is correct
82 Correct 1631 ms 100856 KB Output is correct
83 Correct 1694 ms 100856 KB Output is correct
84 Correct 1416 ms 101492 KB Output is correct
85 Correct 1416 ms 101484 KB Output is correct
86 Correct 1324 ms 180592 KB Output is correct
87 Correct 1482 ms 188528 KB Output is correct
88 Correct 1683 ms 110868 KB Output is correct
89 Correct 2218 ms 116188 KB Output is correct