답안 #212145

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
212145	2020-03-22T11:12:55 Z	zimpha	조이터에서 친구를 만드는건 재밌어 (JOI20_joitter2)	C++17	100 / 100	642 ms	40772 KB

joitter2

#include <cstdio>
#include <vector>
#include <algorithm>
#include <set>
#include <map>

using int64 = long long;

const int N = 1e5 + 10;

std::set<int> in[N];
std::set<std::pair<int, int>> out[N];
int dsu[N], size[N];
int64 ret;

int get(int x) {
  if (x != dsu[x]) dsu[x] = get(dsu[x]);
  return dsu[x];
}

void add(int u, int v) {
  int ru = get(u), rv = get(v);
  if (ru == rv) return;
  auto it = out[rv].lower_bound({ru, 0});
  if (it != out[rv].end() && it->first == ru) { // merge
    ret += (int64)size[ru] * size[rv] * 2;
    if (in[ru].size() + out[ru].size() > in[rv].size() + out[rv].size()) {
      std::swap(ru, rv);
    }
    std::vector<std::pair<int, int>> new_out;
    for (auto &e: out[ru]) {
      in[e.first].erase(e.second);
      ret -= size[e.first];
      if (e.first != rv) new_out.push_back(e);
    }
    out[ru].clear();
    ret -= (int64)size[ru] * in[ru].size();
    ret += (int64)size[ru] * in[rv].size();
    std::vector<int> new_in;
    for (auto &x: in[ru]) {
      int rx = get(x);
      out[rx].erase({ru, x});
      if (rx != rv) new_in.push_back(x);
    }
    in[ru].clear();
    dsu[ru] = rv; size[rv] += size[ru];
    for (auto &x: new_in) add(x, rv);
    for (auto &e: new_out) add(e.second, e.first);
  } else if (!in[rv].count(u)) {
    ret += size[rv];
    out[ru].emplace(rv, u);
    in[rv].insert(u);
  }
}

int main() {
  int n, m;
  scanf("%d%d", &n, &m);
  for (int i = 0; i < n; ++i) dsu[i] = i, size[i] = 1;
  for (int i = 0; i < m; ++i) {
    int u, v;
    scanf("%d%d", &u, &v);
    add(u - 1, v - 1);
    printf("%lld\n", ret);
  }
  return 0;
}

Compilation message

joitter2.cpp: In function 'int main()':
joitter2.cpp:58:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d", &n, &m);
   ~~~~~^~~~~~~~~~~~~~~~
joitter2.cpp:62:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &u, &v);
     ~~~~~^~~~~~~~~~~~~~~~

Subtask #1
1.0 / 1.0

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

Subtask #2
16.0 / 16.0

#	결과	실행 시간	메모리	Grader output
1	Correct	10 ms	9728 KB	Output is correct
2	Correct	9 ms	9728 KB	Output is correct
3	Correct	9 ms	9728 KB	Output is correct
4	Correct	10 ms	9728 KB	Output is correct
5	Correct	10 ms	9728 KB	Output is correct
6	Correct	9 ms	9728 KB	Output is correct
7	Correct	10 ms	9728 KB	Output is correct
8	Correct	11 ms	9728 KB	Output is correct
9	Correct	13 ms	9728 KB	Output is correct
10	Correct	9 ms	9728 KB	Output is correct
11	Correct	10 ms	9728 KB	Output is correct
12	Correct	10 ms	9728 KB	Output is correct
13	Correct	12 ms	9728 KB	Output is correct
14	Correct	10 ms	9728 KB	Output is correct
15	Correct	10 ms	9728 KB	Output is correct
16	Correct	9 ms	9728 KB	Output is correct
17	Correct	10 ms	9728 KB	Output is correct
18	Correct	11 ms	9728 KB	Output is correct
19	Correct	10 ms	9728 KB	Output is correct
20	Correct	10 ms	9728 KB	Output is correct
21	Correct	11 ms	9728 KB	Output is correct
22	Correct	10 ms	9728 KB	Output is correct
23	Correct	10 ms	9728 KB	Output is correct
24	Correct	10 ms	9728 KB	Output is correct
25	Correct	10 ms	9728 KB	Output is correct
26	Correct	11 ms	9728 KB	Output is correct
27	Correct	10 ms	9728 KB	Output is correct
28	Correct	11 ms	9728 KB	Output is correct
29	Correct	12 ms	9728 KB	Output is correct
30	Correct	9 ms	9728 KB	Output is correct
31	Correct	10 ms	9728 KB	Output is correct
32	Correct	10 ms	9728 KB	Output is correct
33	Correct	10 ms	9728 KB	Output is correct
34	Correct	13 ms	9856 KB	Output is correct
35	Correct	133 ms	12920 KB	Output is correct
36	Correct	137 ms	14584 KB	Output is correct
37	Correct	141 ms	14584 KB	Output is correct
38	Correct	150 ms	14488 KB	Output is correct
39	Correct	11 ms	9728 KB	Output is correct
40	Correct	13 ms	9856 KB	Output is correct
41	Correct	12 ms	9856 KB	Output is correct
42	Correct	12 ms	9728 KB	Output is correct
43	Correct	12 ms	9856 KB	Output is correct
44	Correct	14 ms	9856 KB	Output is correct
45	Correct	12 ms	9728 KB	Output is correct
46	Correct	12 ms	9728 KB	Output is correct
47	Correct	12 ms	9856 KB	Output is correct
48	Correct	12 ms	9856 KB	Output is correct
49	Correct	18 ms	10240 KB	Output is correct
50	Correct	143 ms	14712 KB	Output is correct
51	Correct	18 ms	9984 KB	Output is correct
52	Correct	132 ms	13560 KB	Output is correct
53	Correct	18 ms	10240 KB	Output is correct
54	Correct	135 ms	14200 KB	Output is correct
55	Correct	14 ms	10112 KB	Output is correct
56	Correct	15 ms	10112 KB	Output is correct
57	Correct	14 ms	10112 KB	Output is correct
58	Correct	14 ms	10112 KB	Output is correct
59	Correct	12 ms	9728 KB	Output is correct
60	Correct	122 ms	12152 KB	Output is correct
61	Correct	13 ms	9856 KB	Output is correct
62	Correct	151 ms	14456 KB	Output is correct

Subtask #3
83.0 / 83.0

#	결과	실행 시간	메모리	Grader output
1	Correct	10 ms	9728 KB	Output is correct
2	Correct	9 ms	9728 KB	Output is correct
3	Correct	9 ms	9728 KB	Output is correct
4	Correct	10 ms	9728 KB	Output is correct
5	Correct	10 ms	9728 KB	Output is correct
6	Correct	9 ms	9728 KB	Output is correct
7	Correct	10 ms	9728 KB	Output is correct
8	Correct	11 ms	9728 KB	Output is correct
9	Correct	13 ms	9728 KB	Output is correct
10	Correct	9 ms	9728 KB	Output is correct
11	Correct	10 ms	9728 KB	Output is correct
12	Correct	10 ms	9728 KB	Output is correct
13	Correct	12 ms	9728 KB	Output is correct
14	Correct	10 ms	9728 KB	Output is correct
15	Correct	10 ms	9728 KB	Output is correct
16	Correct	9 ms	9728 KB	Output is correct
17	Correct	10 ms	9728 KB	Output is correct
18	Correct	11 ms	9728 KB	Output is correct
19	Correct	10 ms	9728 KB	Output is correct
20	Correct	10 ms	9728 KB	Output is correct
21	Correct	11 ms	9728 KB	Output is correct
22	Correct	10 ms	9728 KB	Output is correct
23	Correct	10 ms	9728 KB	Output is correct
24	Correct	10 ms	9728 KB	Output is correct
25	Correct	10 ms	9728 KB	Output is correct
26	Correct	11 ms	9728 KB	Output is correct
27	Correct	10 ms	9728 KB	Output is correct
28	Correct	11 ms	9728 KB	Output is correct
29	Correct	12 ms	9728 KB	Output is correct
30	Correct	9 ms	9728 KB	Output is correct
31	Correct	10 ms	9728 KB	Output is correct
32	Correct	10 ms	9728 KB	Output is correct
33	Correct	10 ms	9728 KB	Output is correct
34	Correct	13 ms	9856 KB	Output is correct
35	Correct	133 ms	12920 KB	Output is correct
36	Correct	137 ms	14584 KB	Output is correct
37	Correct	141 ms	14584 KB	Output is correct
38	Correct	150 ms	14488 KB	Output is correct
39	Correct	11 ms	9728 KB	Output is correct
40	Correct	13 ms	9856 KB	Output is correct
41	Correct	12 ms	9856 KB	Output is correct
42	Correct	12 ms	9728 KB	Output is correct
43	Correct	12 ms	9856 KB	Output is correct
44	Correct	14 ms	9856 KB	Output is correct
45	Correct	12 ms	9728 KB	Output is correct
46	Correct	12 ms	9728 KB	Output is correct
47	Correct	12 ms	9856 KB	Output is correct
48	Correct	12 ms	9856 KB	Output is correct
49	Correct	18 ms	10240 KB	Output is correct
50	Correct	143 ms	14712 KB	Output is correct
51	Correct	18 ms	9984 KB	Output is correct
52	Correct	132 ms	13560 KB	Output is correct
53	Correct	18 ms	10240 KB	Output is correct
54	Correct	135 ms	14200 KB	Output is correct
55	Correct	14 ms	10112 KB	Output is correct
56	Correct	15 ms	10112 KB	Output is correct
57	Correct	14 ms	10112 KB	Output is correct
58	Correct	14 ms	10112 KB	Output is correct
59	Correct	12 ms	9728 KB	Output is correct
60	Correct	122 ms	12152 KB	Output is correct
61	Correct	13 ms	9856 KB	Output is correct
62	Correct	151 ms	14456 KB	Output is correct
63	Correct	436 ms	40672 KB	Output is correct
64	Correct	437 ms	40772 KB	Output is correct
65	Correct	422 ms	40696 KB	Output is correct
66	Correct	117 ms	12536 KB	Output is correct
67	Correct	192 ms	16504 KB	Output is correct
68	Correct	116 ms	12536 KB	Output is correct
69	Correct	227 ms	17272 KB	Output is correct
70	Correct	118 ms	12536 KB	Output is correct
71	Correct	132 ms	12620 KB	Output is correct
72	Correct	212 ms	16632 KB	Output is correct
73	Correct	215 ms	16632 KB	Output is correct
74	Correct	642 ms	24644 KB	Output is correct
75	Correct	412 ms	20856 KB	Output is correct
76	Correct	500 ms	23672 KB	Output is correct
77	Correct	493 ms	23672 KB	Output is correct
78	Correct	188 ms	16760 KB	Output is correct
79	Correct	283 ms	18552 KB	Output is correct
80	Correct	156 ms	16632 KB	Output is correct
81	Correct	261 ms	18168 KB	Output is correct
82	Correct	450 ms	30584 KB	Output is correct
83	Correct	449 ms	30584 KB	Output is correct
84	Correct	434 ms	30968 KB	Output is correct
85	Correct	457 ms	30816 KB	Output is correct
86	Correct	129 ms	11896 KB	Output is correct
87	Correct	168 ms	12920 KB	Output is correct
88	Correct	250 ms	16760 KB	Output is correct
89	Correct	544 ms	23160 KB	Output is correct

답안 #212145

Compilation message

Subtask #1 1.0 / 1.0

Subtask #2 16.0 / 16.0

Subtask #3 83.0 / 83.0

Subtask #1
1.0 / 1.0

Subtask #2
16.0 / 16.0

Subtask #3
83.0 / 83.0