답안 #256185

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
256185	2020-08-02T11:06:46 Z	fedoseevtimofey	Mergers (JOI19_mergers)	C++14	100 / 100	1196 ms	79460 KB

mergers

#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;
typedef unsigned long long ull;

const int N = 5e5 + 7;
int par[N];
int ds[N];

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

void join(int a, int b) {
  a = get(a);
  b = get(b);
  if (a != b) {
    if (ds[a] > ds[b]) swap(a, b);
    par[a] = b;
    ds[b] += ds[a];
  }
}   

vector <int> g[N];
mt19937_64 rnd(123);

int a[N], all[N], sz[N], bigChild[N], l[N], r[N];

ull go[N], sum[N];
vector <int> e;

void dfs(int u, int p) {
  e.push_back(u);
  l[u] = (int)e.size() - 1;
  sum[u] += go[a[u]];
  sz[u] = 1;
  bigChild[u] = -1;
  for (auto v : g[u]) {
    if (v != p) {
      dfs(v, u);
      sum[u] += sum[v];
      sz[u] += sz[v];
      if (bigChild[u] == -1 || sz[v] > sz[bigChild[u]]) {
        bigChild[u] = v;
      }
    }
  }
  r[u] = (int)e.size() - 1;
}

bool have[N];
ull need_sum = 0;

void jhfs(int u, int p, bool keep) {
  for (auto v : g[u]) {
    if (v != p && v != bigChild[u]) {
      jhfs(v, u, 0);
    }
  } 
  if (bigChild[u] != -1) {
    jhfs(bigChild[u], u, 1);
  }

  for (auto v : g[u]) {
    if (v != p && v != bigChild[u]) {
      for (int i = l[v]; i <= r[v]; ++i) {
        int c = a[e[i]];
        if (!have[c]) {
          have[c] = 1;
          need_sum += go[c] * all[c];
        }
      }
    }
  }
  if (!have[a[u]]) {
    have[a[u]] = 1;
    need_sum += go[a[u]] * all[a[u]];
  }
  if (sum[u] != need_sum) {
    join(u, p);
  }
  if (!keep) {
    need_sum = 0;
    for (int i = l[u]; i <= r[u]; ++i) {
      int c = a[e[i]];
      have[c] = 0;
    }
  }
}
  
int k;
 
int main() {
  ios_base::sync_with_stdio(false); cin.tie(0);
#ifdef LOCAL
  freopen("input.txt", "r", stdin);
#endif
  int n;
  cin >> n >> k;
  for (int i = 0; i + 1 < n; ++i) {
    int u, v;
    cin >> u >> v;
    --u, --v;
    g[u].push_back(v);
    g[v].push_back(u);
  }
  for (int i = 0; i < n; ++i) {
    cin >> a[i];
    --a[i];
    ++all[a[i]];
  }
  for (int i = 0; i < k; ++i) go[i] = rnd();
  for (int i = 0; i < n; ++i) {
    par[i] = i;
    ds[i] = 1;
  }
  dfs(0, -1);
  jhfs(0, -1, 0);
  vector <int> deg(n);
  for (int i = 0; i < n; ++i) {
    for (int j : g[i]) {
      if (get(i) != get(j)) {
        ++deg[get(i)];
      }
    }
  }
  int cnt = 0;
  for (int i = 0; i < n; ++i) if (deg[i] == 1) ++cnt;
  cout << (cnt + 1) / 2 << '\n';
}

Subtask #1
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	9 ms	12160 KB	Output is correct
2	Correct	10 ms	12160 KB	Output is correct
3	Correct	9 ms	12160 KB	Output is correct
4	Correct	8 ms	12160 KB	Output is correct
5	Correct	9 ms	12160 KB	Output is correct
6	Correct	7 ms	12160 KB	Output is correct
7	Correct	9 ms	12160 KB	Output is correct
8	Correct	8 ms	12160 KB	Output is correct
9	Correct	8 ms	12160 KB	Output is correct
10	Correct	7 ms	12160 KB	Output is correct
11	Correct	7 ms	12160 KB	Output is correct
12	Correct	7 ms	12160 KB	Output is correct
13	Correct	8 ms	12160 KB	Output is correct
14	Correct	7 ms	12160 KB	Output is correct
15	Correct	7 ms	12160 KB	Output is correct
16	Correct	7 ms	12160 KB	Output is correct
17	Correct	7 ms	12160 KB	Output is correct
18	Correct	7 ms	12160 KB	Output is correct
19	Correct	8 ms	12160 KB	Output is correct
20	Correct	7 ms	12160 KB	Output is correct
21	Correct	8 ms	12160 KB	Output is correct
22	Correct	7 ms	12160 KB	Output is correct
23	Correct	7 ms	12160 KB	Output is correct
24	Correct	8 ms	12160 KB	Output is correct

Subtask #2
24.0 / 24.0

#	결과	실행 시간	메모리	Grader output
1	Correct	9 ms	12160 KB	Output is correct
2	Correct	10 ms	12160 KB	Output is correct
3	Correct	9 ms	12160 KB	Output is correct
4	Correct	8 ms	12160 KB	Output is correct
5	Correct	9 ms	12160 KB	Output is correct
6	Correct	7 ms	12160 KB	Output is correct
7	Correct	9 ms	12160 KB	Output is correct
8	Correct	8 ms	12160 KB	Output is correct
9	Correct	8 ms	12160 KB	Output is correct
10	Correct	7 ms	12160 KB	Output is correct
11	Correct	7 ms	12160 KB	Output is correct
12	Correct	7 ms	12160 KB	Output is correct
13	Correct	8 ms	12160 KB	Output is correct
14	Correct	7 ms	12160 KB	Output is correct
15	Correct	7 ms	12160 KB	Output is correct
16	Correct	7 ms	12160 KB	Output is correct
17	Correct	7 ms	12160 KB	Output is correct
18	Correct	7 ms	12160 KB	Output is correct
19	Correct	8 ms	12160 KB	Output is correct
20	Correct	7 ms	12160 KB	Output is correct
21	Correct	8 ms	12160 KB	Output is correct
22	Correct	7 ms	12160 KB	Output is correct
23	Correct	7 ms	12160 KB	Output is correct
24	Correct	8 ms	12160 KB	Output is correct
25	Correct	9 ms	12160 KB	Output is correct
26	Correct	9 ms	12416 KB	Output is correct
27	Correct	9 ms	12416 KB	Output is correct
28	Correct	10 ms	12544 KB	Output is correct
29	Correct	11 ms	12416 KB	Output is correct
30	Correct	11 ms	12416 KB	Output is correct
31	Correct	8 ms	12160 KB	Output is correct
32	Correct	9 ms	12544 KB	Output is correct
33	Correct	7 ms	12160 KB	Output is correct
34	Correct	9 ms	12416 KB	Output is correct
35	Correct	9 ms	12416 KB	Output is correct
36	Correct	11 ms	12416 KB	Output is correct
37	Correct	11 ms	12416 KB	Output is correct
38	Correct	7 ms	12160 KB	Output is correct
39	Correct	11 ms	12416 KB	Output is correct
40	Correct	11 ms	12416 KB	Output is correct
41	Correct	11 ms	12416 KB	Output is correct
42	Correct	9 ms	12416 KB	Output is correct
43	Correct	11 ms	12680 KB	Output is correct
44	Correct	8 ms	12160 KB	Output is correct
45	Correct	9 ms	12544 KB	Output is correct
46	Correct	9 ms	12416 KB	Output is correct
47	Correct	8 ms	12160 KB	Output is correct
48	Correct	9 ms	12416 KB	Output is correct
49	Correct	11 ms	12416 KB	Output is correct
50	Correct	9 ms	12544 KB	Output is correct
51	Correct	10 ms	12416 KB	Output is correct
52	Correct	9 ms	12416 KB	Output is correct
53	Correct	9 ms	12416 KB	Output is correct
54	Correct	12 ms	12416 KB	Output is correct

Subtask #3
14.0 / 14.0

#	결과	실행 시간	메모리	Grader output
1	Correct	9 ms	12160 KB	Output is correct
2	Correct	10 ms	12160 KB	Output is correct
3	Correct	9 ms	12160 KB	Output is correct
4	Correct	8 ms	12160 KB	Output is correct
5	Correct	9 ms	12160 KB	Output is correct
6	Correct	7 ms	12160 KB	Output is correct
7	Correct	9 ms	12160 KB	Output is correct
8	Correct	8 ms	12160 KB	Output is correct
9	Correct	8 ms	12160 KB	Output is correct
10	Correct	7 ms	12160 KB	Output is correct
11	Correct	7 ms	12160 KB	Output is correct
12	Correct	7 ms	12160 KB	Output is correct
13	Correct	8 ms	12160 KB	Output is correct
14	Correct	7 ms	12160 KB	Output is correct
15	Correct	7 ms	12160 KB	Output is correct
16	Correct	7 ms	12160 KB	Output is correct
17	Correct	7 ms	12160 KB	Output is correct
18	Correct	7 ms	12160 KB	Output is correct
19	Correct	8 ms	12160 KB	Output is correct
20	Correct	7 ms	12160 KB	Output is correct
21	Correct	8 ms	12160 KB	Output is correct
22	Correct	7 ms	12160 KB	Output is correct
23	Correct	7 ms	12160 KB	Output is correct
24	Correct	8 ms	12160 KB	Output is correct
25	Correct	8 ms	12160 KB	Output is correct
26	Correct	85 ms	20208 KB	Output is correct
27	Correct	134 ms	19952 KB	Output is correct
28	Correct	12 ms	12416 KB	Output is correct
29	Correct	10 ms	12160 KB	Output is correct
30	Correct	9 ms	12160 KB	Output is correct
31	Correct	98 ms	20136 KB	Output is correct
32	Correct	11 ms	12416 KB	Output is correct
33	Correct	103 ms	27248 KB	Output is correct
34	Correct	96 ms	19948 KB	Output is correct
35	Correct	9 ms	12416 KB	Output is correct
36	Correct	125 ms	20720 KB	Output is correct
37	Correct	9 ms	12416 KB	Output is correct
38	Correct	11 ms	12416 KB	Output is correct
39	Correct	69 ms	20204 KB	Output is correct
40	Correct	10 ms	12672 KB	Output is correct
41	Correct	123 ms	20080 KB	Output is correct
42	Correct	126 ms	22256 KB	Output is correct
43	Correct	8 ms	12160 KB	Output is correct
44	Correct	116 ms	27376 KB	Output is correct
45	Correct	124 ms	23664 KB	Output is correct
46	Correct	9 ms	12416 KB	Output is correct
47	Correct	11 ms	12544 KB	Output is correct

Subtask #4
22.0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	62 ms	20208 KB	Output is correct
2	Correct	75 ms	21488 KB	Output is correct
3	Correct	9 ms	12416 KB	Output is correct
4	Correct	9 ms	12416 KB	Output is correct
5	Correct	8 ms	12160 KB	Output is correct
6	Correct	9 ms	12160 KB	Output is correct
7	Correct	9 ms	12416 KB	Output is correct
8	Correct	124 ms	20592 KB	Output is correct
9	Correct	11 ms	12416 KB	Output is correct
10	Correct	116 ms	19952 KB	Output is correct
11	Correct	9 ms	12160 KB	Output is correct
12	Correct	93 ms	19952 KB	Output is correct
13	Correct	112 ms	20604 KB	Output is correct
14	Correct	134 ms	21232 KB	Output is correct
15	Correct	63 ms	20204 KB	Output is correct
16	Correct	9 ms	12544 KB	Output is correct
17	Correct	8 ms	12160 KB	Output is correct
18	Correct	101 ms	21484 KB	Output is correct
19	Correct	135 ms	25144 KB	Output is correct
20	Correct	9 ms	12416 KB	Output is correct
21	Correct	9 ms	12160 KB	Output is correct
22	Correct	73 ms	20852 KB	Output is correct
23	Correct	9 ms	12416 KB	Output is correct
24	Correct	127 ms	19952 KB	Output is correct
25	Correct	121 ms	23920 KB	Output is correct
26	Correct	10 ms	12544 KB	Output is correct
27	Correct	9 ms	12544 KB	Output is correct
28	Correct	9 ms	12416 KB	Output is correct
29	Correct	9 ms	12416 KB	Output is correct
30	Correct	10 ms	12416 KB	Output is correct

Subtask #5
30.0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	9 ms	12160 KB	Output is correct
2	Correct	10 ms	12160 KB	Output is correct
3	Correct	9 ms	12160 KB	Output is correct
4	Correct	8 ms	12160 KB	Output is correct
5	Correct	9 ms	12160 KB	Output is correct
6	Correct	7 ms	12160 KB	Output is correct
7	Correct	9 ms	12160 KB	Output is correct
8	Correct	8 ms	12160 KB	Output is correct
9	Correct	8 ms	12160 KB	Output is correct
10	Correct	7 ms	12160 KB	Output is correct
11	Correct	7 ms	12160 KB	Output is correct
12	Correct	7 ms	12160 KB	Output is correct
13	Correct	8 ms	12160 KB	Output is correct
14	Correct	7 ms	12160 KB	Output is correct
15	Correct	7 ms	12160 KB	Output is correct
16	Correct	7 ms	12160 KB	Output is correct
17	Correct	7 ms	12160 KB	Output is correct
18	Correct	7 ms	12160 KB	Output is correct
19	Correct	8 ms	12160 KB	Output is correct
20	Correct	7 ms	12160 KB	Output is correct
21	Correct	8 ms	12160 KB	Output is correct
22	Correct	7 ms	12160 KB	Output is correct
23	Correct	7 ms	12160 KB	Output is correct
24	Correct	8 ms	12160 KB	Output is correct
25	Correct	9 ms	12160 KB	Output is correct
26	Correct	9 ms	12416 KB	Output is correct
27	Correct	9 ms	12416 KB	Output is correct
28	Correct	10 ms	12544 KB	Output is correct
29	Correct	11 ms	12416 KB	Output is correct
30	Correct	11 ms	12416 KB	Output is correct
31	Correct	8 ms	12160 KB	Output is correct
32	Correct	9 ms	12544 KB	Output is correct
33	Correct	7 ms	12160 KB	Output is correct
34	Correct	9 ms	12416 KB	Output is correct
35	Correct	9 ms	12416 KB	Output is correct
36	Correct	11 ms	12416 KB	Output is correct
37	Correct	11 ms	12416 KB	Output is correct
38	Correct	7 ms	12160 KB	Output is correct
39	Correct	11 ms	12416 KB	Output is correct
40	Correct	11 ms	12416 KB	Output is correct
41	Correct	11 ms	12416 KB	Output is correct
42	Correct	9 ms	12416 KB	Output is correct
43	Correct	11 ms	12680 KB	Output is correct
44	Correct	8 ms	12160 KB	Output is correct
45	Correct	9 ms	12544 KB	Output is correct
46	Correct	9 ms	12416 KB	Output is correct
47	Correct	8 ms	12160 KB	Output is correct
48	Correct	9 ms	12416 KB	Output is correct
49	Correct	11 ms	12416 KB	Output is correct
50	Correct	9 ms	12544 KB	Output is correct
51	Correct	10 ms	12416 KB	Output is correct
52	Correct	9 ms	12416 KB	Output is correct
53	Correct	9 ms	12416 KB	Output is correct
54	Correct	12 ms	12416 KB	Output is correct
55	Correct	8 ms	12160 KB	Output is correct
56	Correct	85 ms	20208 KB	Output is correct
57	Correct	134 ms	19952 KB	Output is correct
58	Correct	12 ms	12416 KB	Output is correct
59	Correct	10 ms	12160 KB	Output is correct
60	Correct	9 ms	12160 KB	Output is correct
61	Correct	98 ms	20136 KB	Output is correct
62	Correct	11 ms	12416 KB	Output is correct
63	Correct	103 ms	27248 KB	Output is correct
64	Correct	96 ms	19948 KB	Output is correct
65	Correct	9 ms	12416 KB	Output is correct
66	Correct	125 ms	20720 KB	Output is correct
67	Correct	9 ms	12416 KB	Output is correct
68	Correct	11 ms	12416 KB	Output is correct
69	Correct	69 ms	20204 KB	Output is correct
70	Correct	10 ms	12672 KB	Output is correct
71	Correct	123 ms	20080 KB	Output is correct
72	Correct	126 ms	22256 KB	Output is correct
73	Correct	8 ms	12160 KB	Output is correct
74	Correct	116 ms	27376 KB	Output is correct
75	Correct	124 ms	23664 KB	Output is correct
76	Correct	9 ms	12416 KB	Output is correct
77	Correct	11 ms	12544 KB	Output is correct
78	Correct	62 ms	20208 KB	Output is correct
79	Correct	75 ms	21488 KB	Output is correct
80	Correct	9 ms	12416 KB	Output is correct
81	Correct	9 ms	12416 KB	Output is correct
82	Correct	8 ms	12160 KB	Output is correct
83	Correct	9 ms	12160 KB	Output is correct
84	Correct	9 ms	12416 KB	Output is correct
85	Correct	124 ms	20592 KB	Output is correct
86	Correct	11 ms	12416 KB	Output is correct
87	Correct	116 ms	19952 KB	Output is correct
88	Correct	9 ms	12160 KB	Output is correct
89	Correct	93 ms	19952 KB	Output is correct
90	Correct	112 ms	20604 KB	Output is correct
91	Correct	134 ms	21232 KB	Output is correct
92	Correct	63 ms	20204 KB	Output is correct
93	Correct	9 ms	12544 KB	Output is correct
94	Correct	8 ms	12160 KB	Output is correct
95	Correct	101 ms	21484 KB	Output is correct
96	Correct	135 ms	25144 KB	Output is correct
97	Correct	9 ms	12416 KB	Output is correct
98	Correct	9 ms	12160 KB	Output is correct
99	Correct	73 ms	20852 KB	Output is correct
100	Correct	9 ms	12416 KB	Output is correct
101	Correct	127 ms	19952 KB	Output is correct
102	Correct	121 ms	23920 KB	Output is correct
103	Correct	10 ms	12544 KB	Output is correct
104	Correct	9 ms	12544 KB	Output is correct
105	Correct	9 ms	12416 KB	Output is correct
106	Correct	9 ms	12416 KB	Output is correct
107	Correct	10 ms	12416 KB	Output is correct
108	Correct	609 ms	54260 KB	Output is correct
109	Correct	994 ms	68068 KB	Output is correct
110	Correct	1022 ms	79436 KB	Output is correct
111	Correct	1008 ms	79460 KB	Output is correct
112	Correct	1196 ms	69732 KB	Output is correct
113	Correct	787 ms	57172 KB	Output is correct
114	Correct	958 ms	50148 KB	Output is correct
115	Correct	948 ms	50148 KB	Output is correct
116	Correct	1087 ms	51428 KB	Output is correct
117	Correct	823 ms	56500 KB	Output is correct
118	Correct	823 ms	49512 KB	Output is correct
119	Correct	1008 ms	56548 KB	Output is correct
120	Correct	893 ms	70588 KB	Output is correct
121	Correct	946 ms	56560 KB	Output is correct
122	Correct	844 ms	54244 KB	Output is correct
123	Correct	553 ms	58080 KB	Output is correct
124	Correct	1038 ms	55528 KB	Output is correct

답안 #256185

Compilation message

Subtask #1 10.0 / 10.0

Subtask #2 24.0 / 24.0

Subtask #3 14.0 / 14.0

Subtask #4 22.0 / 22.0

Subtask #5 30.0 / 30.0

Subtask #1
10.0 / 10.0

Subtask #2
24.0 / 24.0

Subtask #3
14.0 / 14.0

Subtask #4
22.0 / 22.0

Subtask #5
30.0 / 30.0