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답안 #128932

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
128932 2019-07-11T11:00:50 Z kuroni Mergers (JOI19_mergers) C++17
100 / 100
 1566 ms 64072 KB 
#include <bits/stdc++.h>
using namespace std;

const int N = 500005, K = 500005;

int n, k, u, v, ans = 0, a[N], sub[N], f[N];
int cur = 0, sum[K], cnt[K];
vector<int> adj[N];

void add(int u, int p, int val, int av = 0)
{
    cur -= (cnt[a[u]] == sum[a[u]] || cnt[a[u]] == 0);
    cnt[a[u]] += val;
    cur += (cnt[a[u]] == sum[a[u]] || cnt[a[u]] == 0);
    for (int &v : adj[u])
        if (v != p && v != av)
            add(v, u, val, av);
}

int DFS_1(int u, int p = 0)
{
    sub[u] = 1;
    for (int &v : adj[u])
        if (v != p)
            sub[u] += DFS_1(v, u);
    return sub[u];
}

bool DFS_2(int u, int p, bool big)
{
    int mc = 0;
    for (int &v : adj[u])
        if (v != p && sub[v] > sub[mc])
            mc = v;
    for (int &v : adj[u])
        if (v != p && v != mc)
            f[u] += (DFS_2(v, u, false) ? 1 : f[v]);
    if (mc != 0)
        f[u] += (DFS_2(mc, u, true) ? 1 : f[mc]);
    add(u, p, 1, mc);
    bool chk = (cur == 0);
    if (chk)
        ans += (f[u] == (u == 1));
    if (!big)
        add(u, p, -1);
    return chk;
}

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    cin >> n >> k;
    for (int i = 1; i < n; i++)
    {
        cin >> u >> v;
        adj[u].push_back(v);
        adj[v].push_back(u);
    }
    for (int i = 1; i <= n; i++)
    {
        cin >> a[i];
        sum[a[i]]++;
    }
    DFS_1(1);
    DFS_2(1, 0, true);
    cout << (ans + 1) / 2;
}

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 12152 KB Output is correct
2 Correct 12 ms 12148 KB Output is correct
3 Correct 13 ms 12152 KB Output is correct
4 Correct 13 ms 12152 KB Output is correct
5 Correct 12 ms 12152 KB Output is correct
6 Correct 12 ms 12152 KB Output is correct
7 Correct 12 ms 12068 KB Output is correct
8 Correct 13 ms 12076 KB Output is correct
9 Correct 12 ms 12152 KB Output is correct
10 Correct 12 ms 12152 KB Output is correct
11 Correct 13 ms 12152 KB Output is correct
12 Correct 13 ms 12152 KB Output is correct
13 Correct 13 ms 12148 KB Output is correct
14 Correct 16 ms 12168 KB Output is correct
15 Correct 12 ms 12152 KB Output is correct
16 Correct 16 ms 12152 KB Output is correct
17 Correct 13 ms 12152 KB Output is correct
18 Correct 13 ms 12152 KB Output is correct
19 Correct 12 ms 12152 KB Output is correct
20 Correct 12 ms 12152 KB Output is correct
21 Correct 12 ms 12080 KB Output is correct
22 Correct 13 ms 12152 KB Output is correct
23 Correct 13 ms 12132 KB Output is correct
24 Correct 12 ms 12152 KB Output is correct

Subtask #2
24.0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 12152 KB Output is correct
2 Correct 12 ms 12148 KB Output is correct
3 Correct 13 ms 12152 KB Output is correct
4 Correct 13 ms 12152 KB Output is correct
5 Correct 12 ms 12152 KB Output is correct
6 Correct 12 ms 12152 KB Output is correct
7 Correct 12 ms 12068 KB Output is correct
8 Correct 13 ms 12076 KB Output is correct
9 Correct 12 ms 12152 KB Output is correct
10 Correct 12 ms 12152 KB Output is correct
11 Correct 13 ms 12152 KB Output is correct
12 Correct 13 ms 12152 KB Output is correct
13 Correct 13 ms 12148 KB Output is correct
14 Correct 16 ms 12168 KB Output is correct
15 Correct 12 ms 12152 KB Output is correct
16 Correct 16 ms 12152 KB Output is correct
17 Correct 13 ms 12152 KB Output is correct
18 Correct 13 ms 12152 KB Output is correct
19 Correct 12 ms 12152 KB Output is correct
20 Correct 12 ms 12152 KB Output is correct
21 Correct 12 ms 12080 KB Output is correct
22 Correct 13 ms 12152 KB Output is correct
23 Correct 13 ms 12132 KB Output is correct
24 Correct 12 ms 12152 KB Output is correct
25 Correct 12 ms 12152 KB Output is correct
26 Correct 14 ms 12280 KB Output is correct
27 Correct 14 ms 12280 KB Output is correct
28 Correct 14 ms 12408 KB Output is correct
29 Correct 14 ms 12252 KB Output is correct
30 Correct 15 ms 12280 KB Output is correct
31 Correct 12 ms 12152 KB Output is correct
32 Correct 15 ms 12408 KB Output is correct
33 Correct 12 ms 12152 KB Output is correct
34 Correct 14 ms 12280 KB Output is correct
35 Correct 15 ms 12364 KB Output is correct
36 Correct 15 ms 12280 KB Output is correct
37 Correct 15 ms 12280 KB Output is correct
38 Correct 13 ms 12132 KB Output is correct
39 Correct 15 ms 12252 KB Output is correct
40 Correct 15 ms 12280 KB Output is correct
41 Correct 14 ms 12280 KB Output is correct
42 Correct 14 ms 12280 KB Output is correct
43 Correct 14 ms 12536 KB Output is correct
44 Correct 13 ms 12152 KB Output is correct
45 Correct 14 ms 12408 KB Output is correct
46 Correct 15 ms 12280 KB Output is correct
47 Correct 14 ms 12144 KB Output is correct
48 Correct 15 ms 12252 KB Output is correct
49 Correct 14 ms 12384 KB Output is correct
50 Correct 15 ms 12408 KB Output is correct
51 Correct 15 ms 12280 KB Output is correct
52 Correct 14 ms 12280 KB Output is correct
53 Correct 14 ms 12280 KB Output is correct
54 Correct 15 ms 12224 KB Output is correct

Subtask #3
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 12152 KB Output is correct
2 Correct 12 ms 12148 KB Output is correct
3 Correct 13 ms 12152 KB Output is correct
4 Correct 13 ms 12152 KB Output is correct
5 Correct 12 ms 12152 KB Output is correct
6 Correct 12 ms 12152 KB Output is correct
7 Correct 12 ms 12068 KB Output is correct
8 Correct 13 ms 12076 KB Output is correct
9 Correct 12 ms 12152 KB Output is correct
10 Correct 12 ms 12152 KB Output is correct
11 Correct 13 ms 12152 KB Output is correct
12 Correct 13 ms 12152 KB Output is correct
13 Correct 13 ms 12148 KB Output is correct
14 Correct 16 ms 12168 KB Output is correct
15 Correct 12 ms 12152 KB Output is correct
16 Correct 16 ms 12152 KB Output is correct
17 Correct 13 ms 12152 KB Output is correct
18 Correct 13 ms 12152 KB Output is correct
19 Correct 12 ms 12152 KB Output is correct
20 Correct 12 ms 12152 KB Output is correct
21 Correct 12 ms 12080 KB Output is correct
22 Correct 13 ms 12152 KB Output is correct
23 Correct 13 ms 12132 KB Output is correct
24 Correct 12 ms 12152 KB Output is correct
25 Correct 12 ms 12152 KB Output is correct
26 Correct 69 ms 17052 KB Output is correct
27 Correct 132 ms 17188 KB Output is correct
28 Correct 14 ms 12280 KB Output is correct
29 Correct 12 ms 12128 KB Output is correct
30 Correct 13 ms 12152 KB Output is correct
31 Correct 136 ms 17144 KB Output is correct
32 Correct 14 ms 12276 KB Output is correct
33 Correct 125 ms 24312 KB Output is correct
34 Correct 141 ms 17128 KB Output is correct
35 Correct 17 ms 12280 KB Output is correct
36 Correct 157 ms 17804 KB Output is correct
37 Correct 14 ms 12284 KB Output is correct
38 Correct 14 ms 12280 KB Output is correct
39 Correct 72 ms 16996 KB Output is correct
40 Correct 14 ms 12536 KB Output is correct
41 Correct 144 ms 17192 KB Output is correct
42 Correct 133 ms 19448 KB Output is correct
43 Correct 12 ms 12128 KB Output is correct
44 Correct 163 ms 24636 KB Output is correct
45 Correct 142 ms 21016 KB Output is correct
46 Correct 14 ms 12280 KB Output is correct
47 Correct 15 ms 12280 KB Output is correct

Subtask #4
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 73 ms 17108 KB Output is correct
2 Correct 82 ms 17920 KB Output is correct
3 Correct 14 ms 12280 KB Output is correct
4 Correct 15 ms 12336 KB Output is correct
5 Correct 12 ms 12156 KB Output is correct
6 Correct 12 ms 12152 KB Output is correct
7 Correct 13 ms 12280 KB Output is correct
8 Correct 149 ms 17768 KB Output is correct
9 Correct 15 ms 12252 KB Output is correct
10 Correct 138 ms 17144 KB Output is correct
11 Correct 13 ms 12084 KB Output is correct
12 Correct 175 ms 17312 KB Output is correct
13 Correct 160 ms 17580 KB Output is correct
14 Correct 149 ms 18032 KB Output is correct
15 Correct 73 ms 17056 KB Output is correct
16 Correct 14 ms 12280 KB Output is correct
17 Correct 12 ms 12140 KB Output is correct
18 Correct 88 ms 17760 KB Output is correct
19 Correct 173 ms 21956 KB Output is correct
20 Correct 15 ms 12276 KB Output is correct
21 Correct 13 ms 12160 KB Output is correct
22 Correct 81 ms 17516 KB Output is correct
23 Correct 15 ms 12292 KB Output is correct
24 Correct 162 ms 17236 KB Output is correct
25 Correct 116 ms 20568 KB Output is correct
26 Correct 14 ms 12280 KB Output is correct
27 Correct 15 ms 12416 KB Output is correct
28 Correct 15 ms 12280 KB Output is correct
29 Correct 14 ms 12252 KB Output is correct
30 Correct 14 ms 12280 KB Output is correct

Subtask #5
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 12152 KB Output is correct
2 Correct 12 ms 12148 KB Output is correct
3 Correct 13 ms 12152 KB Output is correct
4 Correct 13 ms 12152 KB Output is correct
5 Correct 12 ms 12152 KB Output is correct
6 Correct 12 ms 12152 KB Output is correct
7 Correct 12 ms 12068 KB Output is correct
8 Correct 13 ms 12076 KB Output is correct
9 Correct 12 ms 12152 KB Output is correct
10 Correct 12 ms 12152 KB Output is correct
11 Correct 13 ms 12152 KB Output is correct
12 Correct 13 ms 12152 KB Output is correct
13 Correct 13 ms 12148 KB Output is correct
14 Correct 16 ms 12168 KB Output is correct
15 Correct 12 ms 12152 KB Output is correct
16 Correct 16 ms 12152 KB Output is correct
17 Correct 13 ms 12152 KB Output is correct
18 Correct 13 ms 12152 KB Output is correct
19 Correct 12 ms 12152 KB Output is correct
20 Correct 12 ms 12152 KB Output is correct
21 Correct 12 ms 12080 KB Output is correct
22 Correct 13 ms 12152 KB Output is correct
23 Correct 13 ms 12132 KB Output is correct
24 Correct 12 ms 12152 KB Output is correct
25 Correct 12 ms 12152 KB Output is correct
26 Correct 14 ms 12280 KB Output is correct
27 Correct 14 ms 12280 KB Output is correct
28 Correct 14 ms 12408 KB Output is correct
29 Correct 14 ms 12252 KB Output is correct
30 Correct 15 ms 12280 KB Output is correct
31 Correct 12 ms 12152 KB Output is correct
32 Correct 15 ms 12408 KB Output is correct
33 Correct 12 ms 12152 KB Output is correct
34 Correct 14 ms 12280 KB Output is correct
35 Correct 15 ms 12364 KB Output is correct
36 Correct 15 ms 12280 KB Output is correct
37 Correct 15 ms 12280 KB Output is correct
38 Correct 13 ms 12132 KB Output is correct
39 Correct 15 ms 12252 KB Output is correct
40 Correct 15 ms 12280 KB Output is correct
41 Correct 14 ms 12280 KB Output is correct
42 Correct 14 ms 12280 KB Output is correct
43 Correct 14 ms 12536 KB Output is correct
44 Correct 13 ms 12152 KB Output is correct
45 Correct 14 ms 12408 KB Output is correct
46 Correct 15 ms 12280 KB Output is correct
47 Correct 14 ms 12144 KB Output is correct
48 Correct 15 ms 12252 KB Output is correct
49 Correct 14 ms 12384 KB Output is correct
50 Correct 15 ms 12408 KB Output is correct
51 Correct 15 ms 12280 KB Output is correct
52 Correct 14 ms 12280 KB Output is correct
53 Correct 14 ms 12280 KB Output is correct
54 Correct 15 ms 12224 KB Output is correct
55 Correct 12 ms 12152 KB Output is correct
56 Correct 69 ms 17052 KB Output is correct
57 Correct 132 ms 17188 KB Output is correct
58 Correct 14 ms 12280 KB Output is correct
59 Correct 12 ms 12128 KB Output is correct
60 Correct 13 ms 12152 KB Output is correct
61 Correct 136 ms 17144 KB Output is correct
62 Correct 14 ms 12276 KB Output is correct
63 Correct 125 ms 24312 KB Output is correct
64 Correct 141 ms 17128 KB Output is correct
65 Correct 17 ms 12280 KB Output is correct
66 Correct 157 ms 17804 KB Output is correct
67 Correct 14 ms 12284 KB Output is correct
68 Correct 14 ms 12280 KB Output is correct
69 Correct 72 ms 16996 KB Output is correct
70 Correct 14 ms 12536 KB Output is correct
71 Correct 144 ms 17192 KB Output is correct
72 Correct 133 ms 19448 KB Output is correct
73 Correct 12 ms 12128 KB Output is correct
74 Correct 163 ms 24636 KB Output is correct
75 Correct 142 ms 21016 KB Output is correct
76 Correct 14 ms 12280 KB Output is correct
77 Correct 15 ms 12280 KB Output is correct
78 Correct 73 ms 17108 KB Output is correct
79 Correct 82 ms 17920 KB Output is correct
80 Correct 14 ms 12280 KB Output is correct
81 Correct 15 ms 12336 KB Output is correct
82 Correct 12 ms 12156 KB Output is correct
83 Correct 12 ms 12152 KB Output is correct
84 Correct 13 ms 12280 KB Output is correct
85 Correct 149 ms 17768 KB Output is correct
86 Correct 15 ms 12252 KB Output is correct
87 Correct 138 ms 17144 KB Output is correct
88 Correct 13 ms 12084 KB Output is correct
89 Correct 175 ms 17312 KB Output is correct
90 Correct 160 ms 17580 KB Output is correct
91 Correct 149 ms 18032 KB Output is correct
92 Correct 73 ms 17056 KB Output is correct
93 Correct 14 ms 12280 KB Output is correct
94 Correct 12 ms 12140 KB Output is correct
95 Correct 88 ms 17760 KB Output is correct
96 Correct 173 ms 21956 KB Output is correct
97 Correct 15 ms 12276 KB Output is correct
98 Correct 13 ms 12160 KB Output is correct
99 Correct 81 ms 17516 KB Output is correct
100 Correct 15 ms 12292 KB Output is correct
101 Correct 162 ms 17236 KB Output is correct
102 Correct 116 ms 20568 KB Output is correct
103 Correct 14 ms 12280 KB Output is correct
104 Correct 15 ms 12416 KB Output is correct
105 Correct 15 ms 12280 KB Output is correct
106 Correct 14 ms 12252 KB Output is correct
107 Correct 14 ms 12280 KB Output is correct
108 Correct 496 ms 35872 KB Output is correct
109 Correct 1035 ms 52840 KB Output is correct
110 Correct 948 ms 64072 KB Output is correct
111 Correct 1118 ms 61812 KB Output is correct
112 Correct 1000 ms 52040 KB Output is correct
113 Correct 545 ms 37748 KB Output is correct
114 Correct 1077 ms 34864 KB Output is correct
115 Correct 1102 ms 34860 KB Output is correct
116 Correct 1231 ms 35732 KB Output is correct
117 Correct 1320 ms 38760 KB Output is correct
118 Correct 1061 ms 34448 KB Output is correct
119 Correct 1252 ms 38752 KB Output is correct
120 Correct 953 ms 52704 KB Output is correct
121 Correct 1219 ms 38660 KB Output is correct
122 Correct 1222 ms 37104 KB Output is correct
123 Correct 516 ms 38228 KB Output is correct
124 Correct 1566 ms 38048 KB Output is correct