oj.uz

Submission #217221

# Submission time Handle Problem Language Result Execution time Memory
217221 2020-03-29T08:59:51 Z fedoseevtimofey Making Friends on Joitter is Fun (JOI20_joitter2) C++14
100 / 100
 1275 ms 72440 KB 
#include <iostream>
#include <string>
#include <vector>
#include <queue>
#include <deque>
#include <stack>
#include <set>
#include <map>
#include <unordered_map>
#include <unordered_set>
#include <cstring>
#include <cmath>
#include <cstdlib>
#include <algorithm>
#include <random>
#include <iomanip>
#include <functional>
#include <cassert>

using namespace std;

typedef long long ll;

const int N = 1e5 + 7;
int sz[N];
int p[N];
set <int> out[N];
set <int> in[N];
set <int> who[N];
set <int> ver[N];

int get(int a) {
  return (a == p[a] ? a : p[a] = get(p[a]));
}

ll ans = 0;

void join(int a, int b) {
  a = get(a);
  b = get(b);
  if (a != b) {
    ans -= (ll)sz[a] * (sz[a] - 1);
    ans -= (ll)sz[b] * (sz[b] - 1);
    if (in[a].size() + out[a].size() + who[a].size() + ver[a].size() > in[b].size() + out[b].size() + who[b].size() + ver[b].size()) swap(a, b);
    in[a].erase(b);
    out[a].erase(b);
    in[b].erase(a);
    out[b].erase(a);
    ans += (ll)who[a].size() * sz[b];
    ans += (ll)who[b].size() * sz[a];
    for (int x : who[a]) {
      if (who[b].count(x)) {
        ans -= sz[a] + sz[b];
      } else if (ver[b].count(x)) {
        ans -= sz[a] + sz[b];
      } else {
        who[b].insert(x);
      }
    }
    for (int x : ver[a]) {
      if (who[b].count(x)) {
        ans -= sz[a] + sz[b];
        who[b].erase(x);
      }
      ver[b].insert(x);
    }
    vector <pair <int, int>> to_join;
    for (int x : in[a]) {
      if (out[b].count(x)) {
        to_join.push_back({x, b});
      }
      in[b].insert(x);
      out[x].erase(a);
      out[x].insert(b);
    }
    for (int x : out[a]) {
      if (in[b].count(x)) {
        to_join.push_back({x, b});
      }
      out[b].insert(x);
      in[x].erase(a);
      in[x].insert(b);
    }
    who[a] = {};
    ver[a] = {};
    in[a] = {};
    out[a] = {};

    p[a] = b;
    sz[b] += sz[a];
    ans += (ll)sz[b] * (sz[b] - 1);
    for (auto p : to_join) join(p.first, p.second);
  }
}

int main() {
  ios_base::sync_with_stdio(false); cin.tie(0);
#ifdef LOCAL
  freopen("input.txt", "r", stdin);
#endif
  int n, m;
  cin >> n >> m;
  for (int i = 0; i < n; ++i) {
    p[i] = i;
    sz[i] = 1;
    ver[i].insert(i);
  }
  for (int i = 0; i < m; ++i) {
    int u, v;
    cin >> u >> v;
    --u, --v;
    int a = get(u);
    int b = get(v);
    if (a != b) {
      out[a].insert(b);
      in[b].insert(a);
      if (!who[b].count(u)) {
        who[b].insert(u);
        ans += sz[b];
      }
    } 
    if (out[b].count(a)) {
      join(a, b);
    }
    cout << ans << '\n';
  }
}

Subtask #1
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 19072 KB Output is correct
2 Correct 14 ms 19072 KB Output is correct
3 Correct 15 ms 19072 KB Output is correct
4 Correct 15 ms 19072 KB Output is correct
5 Correct 15 ms 19072 KB Output is correct
6 Correct 15 ms 19072 KB Output is correct
7 Correct 16 ms 19200 KB Output is correct
8 Correct 16 ms 19200 KB Output is correct
9 Correct 15 ms 19232 KB Output is correct
10 Correct 15 ms 19072 KB Output is correct
11 Correct 15 ms 19072 KB Output is correct
12 Correct 15 ms 19072 KB Output is correct
13 Correct 15 ms 19072 KB Output is correct
14 Correct 15 ms 19072 KB Output is correct
15 Correct 16 ms 19328 KB Output is correct
16 Correct 15 ms 19072 KB Output is correct
17 Correct 15 ms 19072 KB Output is correct
18 Correct 14 ms 19072 KB Output is correct
19 Correct 15 ms 19072 KB Output is correct
20 Correct 15 ms 19200 KB Output is correct
21 Correct 16 ms 19200 KB Output is correct
22 Correct 15 ms 19072 KB Output is correct
23 Correct 15 ms 19200 KB Output is correct
24 Correct 15 ms 19200 KB Output is correct
25 Correct 15 ms 19200 KB Output is correct
26 Correct 15 ms 19200 KB Output is correct
27 Correct 15 ms 19200 KB Output is correct
28 Correct 15 ms 19200 KB Output is correct
29 Correct 15 ms 19200 KB Output is correct
30 Correct 15 ms 19072 KB Output is correct
31 Correct 16 ms 19200 KB Output is correct
32 Correct 19 ms 19072 KB Output is correct
33 Correct 17 ms 19200 KB Output is correct

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 19072 KB Output is correct
2 Correct 14 ms 19072 KB Output is correct
3 Correct 15 ms 19072 KB Output is correct
4 Correct 15 ms 19072 KB Output is correct
5 Correct 15 ms 19072 KB Output is correct
6 Correct 15 ms 19072 KB Output is correct
7 Correct 16 ms 19200 KB Output is correct
8 Correct 16 ms 19200 KB Output is correct
9 Correct 15 ms 19232 KB Output is correct
10 Correct 15 ms 19072 KB Output is correct
11 Correct 15 ms 19072 KB Output is correct
12 Correct 15 ms 19072 KB Output is correct
13 Correct 15 ms 19072 KB Output is correct
14 Correct 15 ms 19072 KB Output is correct
15 Correct 16 ms 19328 KB Output is correct
16 Correct 15 ms 19072 KB Output is correct
17 Correct 15 ms 19072 KB Output is correct
18 Correct 14 ms 19072 KB Output is correct
19 Correct 15 ms 19072 KB Output is correct
20 Correct 15 ms 19200 KB Output is correct
21 Correct 16 ms 19200 KB Output is correct
22 Correct 15 ms 19072 KB Output is correct
23 Correct 15 ms 19200 KB Output is correct
24 Correct 15 ms 19200 KB Output is correct
25 Correct 15 ms 19200 KB Output is correct
26 Correct 15 ms 19200 KB Output is correct
27 Correct 15 ms 19200 KB Output is correct
28 Correct 15 ms 19200 KB Output is correct
29 Correct 15 ms 19200 KB Output is correct
30 Correct 15 ms 19072 KB Output is correct
31 Correct 16 ms 19200 KB Output is correct
32 Correct 19 ms 19072 KB Output is correct
33 Correct 17 ms 19200 KB Output is correct
34 Correct 20 ms 19332 KB Output is correct
35 Correct 105 ms 25080 KB Output is correct
36 Correct 133 ms 27768 KB Output is correct
37 Correct 137 ms 27768 KB Output is correct
38 Correct 130 ms 27512 KB Output is correct
39 Correct 17 ms 19328 KB Output is correct
40 Correct 21 ms 19456 KB Output is correct
41 Correct 20 ms 19456 KB Output is correct
42 Correct 17 ms 19328 KB Output is correct
43 Correct 22 ms 19456 KB Output is correct
44 Correct 20 ms 19456 KB Output is correct
45 Correct 22 ms 19328 KB Output is correct
46 Correct 20 ms 19328 KB Output is correct
47 Correct 20 ms 19456 KB Output is correct
48 Correct 20 ms 19456 KB Output is correct
49 Correct 27 ms 20172 KB Output is correct
50 Correct 146 ms 27896 KB Output is correct
51 Correct 27 ms 19712 KB Output is correct
52 Correct 126 ms 26484 KB Output is correct
53 Correct 36 ms 20216 KB Output is correct
54 Correct 124 ms 27064 KB Output is correct
55 Correct 23 ms 19840 KB Output is correct
56 Correct 22 ms 19840 KB Output is correct
57 Correct 31 ms 20088 KB Output is correct
58 Correct 22 ms 20096 KB Output is correct
59 Correct 24 ms 19328 KB Output is correct
60 Correct 97 ms 24316 KB Output is correct
61 Correct 23 ms 19456 KB Output is correct
62 Correct 126 ms 27256 KB Output is correct

Subtask #3
83.0 / 83.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 19072 KB Output is correct
2 Correct 14 ms 19072 KB Output is correct
3 Correct 15 ms 19072 KB Output is correct
4 Correct 15 ms 19072 KB Output is correct
5 Correct 15 ms 19072 KB Output is correct
6 Correct 15 ms 19072 KB Output is correct
7 Correct 16 ms 19200 KB Output is correct
8 Correct 16 ms 19200 KB Output is correct
9 Correct 15 ms 19232 KB Output is correct
10 Correct 15 ms 19072 KB Output is correct
11 Correct 15 ms 19072 KB Output is correct
12 Correct 15 ms 19072 KB Output is correct
13 Correct 15 ms 19072 KB Output is correct
14 Correct 15 ms 19072 KB Output is correct
15 Correct 16 ms 19328 KB Output is correct
16 Correct 15 ms 19072 KB Output is correct
17 Correct 15 ms 19072 KB Output is correct
18 Correct 14 ms 19072 KB Output is correct
19 Correct 15 ms 19072 KB Output is correct
20 Correct 15 ms 19200 KB Output is correct
21 Correct 16 ms 19200 KB Output is correct
22 Correct 15 ms 19072 KB Output is correct
23 Correct 15 ms 19200 KB Output is correct
24 Correct 15 ms 19200 KB Output is correct
25 Correct 15 ms 19200 KB Output is correct
26 Correct 15 ms 19200 KB Output is correct
27 Correct 15 ms 19200 KB Output is correct
28 Correct 15 ms 19200 KB Output is correct
29 Correct 15 ms 19200 KB Output is correct
30 Correct 15 ms 19072 KB Output is correct
31 Correct 16 ms 19200 KB Output is correct
32 Correct 19 ms 19072 KB Output is correct
33 Correct 17 ms 19200 KB Output is correct
34 Correct 20 ms 19332 KB Output is correct
35 Correct 105 ms 25080 KB Output is correct
36 Correct 133 ms 27768 KB Output is correct
37 Correct 137 ms 27768 KB Output is correct
38 Correct 130 ms 27512 KB Output is correct
39 Correct 17 ms 19328 KB Output is correct
40 Correct 21 ms 19456 KB Output is correct
41 Correct 20 ms 19456 KB Output is correct
42 Correct 17 ms 19328 KB Output is correct
43 Correct 22 ms 19456 KB Output is correct
44 Correct 20 ms 19456 KB Output is correct
45 Correct 22 ms 19328 KB Output is correct
46 Correct 20 ms 19328 KB Output is correct
47 Correct 20 ms 19456 KB Output is correct
48 Correct 20 ms 19456 KB Output is correct
49 Correct 27 ms 20172 KB Output is correct
50 Correct 146 ms 27896 KB Output is correct
51 Correct 27 ms 19712 KB Output is correct
52 Correct 126 ms 26484 KB Output is correct
53 Correct 36 ms 20216 KB Output is correct
54 Correct 124 ms 27064 KB Output is correct
55 Correct 23 ms 19840 KB Output is correct
56 Correct 22 ms 19840 KB Output is correct
57 Correct 31 ms 20088 KB Output is correct
58 Correct 22 ms 20096 KB Output is correct
59 Correct 24 ms 19328 KB Output is correct
60 Correct 97 ms 24316 KB Output is correct
61 Correct 23 ms 19456 KB Output is correct
62 Correct 126 ms 27256 KB Output is correct
63 Correct 580 ms 72440 KB Output is correct
64 Correct 578 ms 72312 KB Output is correct
65 Correct 587 ms 72440 KB Output is correct
66 Correct 253 ms 29048 KB Output is correct
67 Correct 518 ms 35320 KB Output is correct
68 Correct 258 ms 29060 KB Output is correct
69 Correct 582 ms 36088 KB Output is correct
70 Correct 266 ms 29048 KB Output is correct
71 Correct 266 ms 29048 KB Output is correct
72 Correct 553 ms 35448 KB Output is correct
73 Correct 562 ms 35576 KB Output is correct
74 Correct 1275 ms 47212 KB Output is correct
75 Correct 830 ms 41848 KB Output is correct
76 Correct 995 ms 46584 KB Output is correct
77 Correct 1028 ms 46940 KB Output is correct
78 Correct 274 ms 34808 KB Output is correct
79 Correct 494 ms 38264 KB Output is correct
80 Correct 313 ms 34808 KB Output is correct
81 Correct 526 ms 38136 KB Output is correct
82 Correct 1000 ms 56484 KB Output is correct
83 Correct 1004 ms 56440 KB Output is correct
84 Correct 939 ms 65888 KB Output is correct
85 Correct 937 ms 65912 KB Output is correct
86 Correct 337 ms 29816 KB Output is correct
87 Correct 377 ms 32344 KB Output is correct
88 Correct 580 ms 35704 KB Output is correct
89 Correct 979 ms 46348 KB Output is correct