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답안 #941175

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
941175 2024-03-08T08:53:22 Z vjudge1 Mergers (JOI19_mergers) C++17
100 / 100
 990 ms 177256 KB 
#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define ld long double
#define ull unsigned long long
#define pii pair<int,int>
#define pll pair<long long, long long>
#define fi first
#define se second
#define all(a) (a).begin(), (a).end()
#define pb push_back
#define lwb lower_bound
#define upb upper_bound

#define TASKNAME "NAME"

void init()
{
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    ///freopen(TASKNAME".INP","r",stdin); freopen(TASKNAME".OUT","w",stdout);
}

const int SZ = 5e5+5;
const ll INF = INT_MAX / 2, MOD = 1e9+7, INFLL = 2e18;
const double epsilon = 1e-3;

int n,k, s[SZ], h[SZ], up[SZ][20], sum[SZ];
vector<int> adj[SZ], adj2[SZ], vec[SZ];
vector<pii> edges;

struct DSU
{
    int par[SZ], s[SZ];

    void init(int n)
    {
        for(int i = 1; i <= n; i++)
        {
            par[i] = i;
            s[i] = 1;
        }
    }

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

    void join(int u, int v)
    {
        u = get(u);
        v = get(v);
        if(u == v) return;
        if(s[u] < s[v]) swap(u,v);
        par[v] = u;
        s[u] += s[v];
    }

    bool joined(int u, int v)
    {
        u = get(u);
        v = get(v);
        return u == v;
    }
} dsu;

void dfs1(int u, int pre)
{
    for(int v : adj[u])
    {
        if(v == pre) continue;
        up[v][0] = u;
        for(int i = 1; i < 20; i++)
        {
            up[v][i] = up[up[v][i-1]][i-1];
        }
        h[v] = h[u] + 1;
        dfs1(v, u);
    }
}

int lca(int u, int v)
{
    if(h[u] != h[v])
    {
        if(h[u] < h[v]) swap(u,v);
        int dif = h[u] - h[v];
        for(int i = 0; i < 20; i++)
        {
            if(dif >> i & 1) u = up[u][i];
        }
    }
    if(u == v) return u;
    for(int i = 19; i >= 0; i--)
    {
        if(up[u][i] == up[v][i]) continue;
        u = up[u][i];
        v = up[v][i];
    }
    return up[u][0];
}

void dfs2(int u, int pre)
{
    for(int v : adj[u])
    {
        if(v == pre) continue;
        dfs2(v, u);
        sum[u] += sum[v];
    }
    if(sum[u] > 0) dsu.join(s[u],s[pre]);
}
int leaf = 0;

void dfs3(int u, int pre)
{
    if(adj2[u].size() == 1) leaf++;
    for(int v : adj2[u])
    {
        if(v == pre) continue;
        dfs3(v, u);
    }
}

int main()
{
    init();
    cin >> n >> k;
    dsu.init(n);
    for(int i = 1; i < n; i++)
    {
        int u,v;
        cin >> u >> v;
        adj[u].pb(v);
        adj[v].pb(u);
        edges.pb({u,v});
    }
    for(int i = 1; i <= n; i++)
    {
        cin >> s[i];
        vec[s[i]].pb(i);
    }
    dfs1(1, 0);
    for(int i = 1; i <= k; i++)
    {
        int root = vec[i][0];
        for(int j = 1; j < vec[i].size(); j++)
        {
            root = lca(root, vec[i][j]);
        }
        for(int j : vec[i])
        {
            sum[j]++;
        }
        sum[root] -= vec[i].size();
    }
    dfs2(1, 0);
    for(pii e : edges)
    {
        int u = dsu.get(s[e.fi]), v = dsu.get(s[e.se]);
        if(u == v) continue;
        adj2[u].pb(v);
        adj2[v].pb(u);
    }
    for(int i = 1; i <= k; i++)
    {
        if(adj2[i].size())
        {
            dfs3(i,0);
            break;
        }
    }
    cout << (leaf + 1) / 2;
}

Compilation message

mergers.cpp: In function 'int main()':
mergers.cpp:148:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  148 |         for(int j = 1; j < vec[i].size(); j++)
      |                        ~~^~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 14 ms 43356 KB Output is correct
2 Correct 9 ms 43356 KB Output is correct
3 Correct 10 ms 43468 KB Output is correct
4 Correct 9 ms 43472 KB Output is correct
5 Correct 10 ms 43356 KB Output is correct
6 Correct 9 ms 43356 KB Output is correct
7 Correct 8 ms 41304 KB Output is correct
8 Correct 9 ms 43356 KB Output is correct
9 Correct 9 ms 43352 KB Output is correct
10 Correct 9 ms 43356 KB Output is correct
11 Correct 9 ms 43568 KB Output is correct
12 Correct 9 ms 43352 KB Output is correct
13 Correct 9 ms 43356 KB Output is correct
14 Correct 9 ms 43356 KB Output is correct
15 Correct 9 ms 43352 KB Output is correct
16 Correct 10 ms 43544 KB Output is correct
17 Correct 10 ms 43356 KB Output is correct
18 Correct 9 ms 43468 KB Output is correct
19 Correct 9 ms 43356 KB Output is correct
20 Correct 9 ms 43352 KB Output is correct
21 Correct 9 ms 43356 KB Output is correct
22 Correct 9 ms 43356 KB Output is correct
23 Correct 9 ms 43356 KB Output is correct
24 Correct 9 ms 43560 KB Output is correct

Subtask #2
24.0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 14 ms 43356 KB Output is correct
2 Correct 9 ms 43356 KB Output is correct
3 Correct 10 ms 43468 KB Output is correct
4 Correct 9 ms 43472 KB Output is correct
5 Correct 10 ms 43356 KB Output is correct
6 Correct 9 ms 43356 KB Output is correct
7 Correct 8 ms 41304 KB Output is correct
8 Correct 9 ms 43356 KB Output is correct
9 Correct 9 ms 43352 KB Output is correct
10 Correct 9 ms 43356 KB Output is correct
11 Correct 9 ms 43568 KB Output is correct
12 Correct 9 ms 43352 KB Output is correct
13 Correct 9 ms 43356 KB Output is correct
14 Correct 9 ms 43356 KB Output is correct
15 Correct 9 ms 43352 KB Output is correct
16 Correct 10 ms 43544 KB Output is correct
17 Correct 10 ms 43356 KB Output is correct
18 Correct 9 ms 43468 KB Output is correct
19 Correct 9 ms 43356 KB Output is correct
20 Correct 9 ms 43352 KB Output is correct
21 Correct 9 ms 43356 KB Output is correct
22 Correct 9 ms 43356 KB Output is correct
23 Correct 9 ms 43356 KB Output is correct
24 Correct 9 ms 43560 KB Output is correct
25 Correct 9 ms 43352 KB Output is correct
26 Correct 11 ms 43868 KB Output is correct
27 Correct 12 ms 45660 KB Output is correct
28 Correct 11 ms 44124 KB Output is correct
29 Correct 11 ms 43868 KB Output is correct
30 Correct 11 ms 43896 KB Output is correct
31 Correct 10 ms 43496 KB Output is correct
32 Correct 11 ms 44120 KB Output is correct
33 Correct 9 ms 43352 KB Output is correct
34 Correct 12 ms 45660 KB Output is correct
35 Correct 11 ms 43868 KB Output is correct
36 Correct 11 ms 43868 KB Output is correct
37 Correct 12 ms 43868 KB Output is correct
38 Correct 9 ms 43352 KB Output is correct
39 Correct 11 ms 45660 KB Output is correct
40 Correct 10 ms 43868 KB Output is correct
41 Correct 11 ms 45660 KB Output is correct
42 Correct 12 ms 45660 KB Output is correct
43 Correct 11 ms 46052 KB Output is correct
44 Correct 10 ms 43356 KB Output is correct
45 Correct 11 ms 45780 KB Output is correct
46 Correct 11 ms 43736 KB Output is correct
47 Correct 9 ms 43356 KB Output is correct
48 Correct 11 ms 43868 KB Output is correct
49 Correct 11 ms 43864 KB Output is correct
50 Correct 11 ms 45916 KB Output is correct
51 Correct 11 ms 45660 KB Output is correct
52 Correct 10 ms 43900 KB Output is correct
53 Correct 11 ms 43744 KB Output is correct
54 Correct 13 ms 45660 KB Output is correct

Subtask #3
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 14 ms 43356 KB Output is correct
2 Correct 9 ms 43356 KB Output is correct
3 Correct 10 ms 43468 KB Output is correct
4 Correct 9 ms 43472 KB Output is correct
5 Correct 10 ms 43356 KB Output is correct
6 Correct 9 ms 43356 KB Output is correct
7 Correct 8 ms 41304 KB Output is correct
8 Correct 9 ms 43356 KB Output is correct
9 Correct 9 ms 43352 KB Output is correct
10 Correct 9 ms 43356 KB Output is correct
11 Correct 9 ms 43568 KB Output is correct
12 Correct 9 ms 43352 KB Output is correct
13 Correct 9 ms 43356 KB Output is correct
14 Correct 9 ms 43356 KB Output is correct
15 Correct 9 ms 43352 KB Output is correct
16 Correct 10 ms 43544 KB Output is correct
17 Correct 10 ms 43356 KB Output is correct
18 Correct 9 ms 43468 KB Output is correct
19 Correct 9 ms 43356 KB Output is correct
20 Correct 9 ms 43352 KB Output is correct
21 Correct 9 ms 43356 KB Output is correct
22 Correct 9 ms 43356 KB Output is correct
23 Correct 9 ms 43356 KB Output is correct
24 Correct 9 ms 43560 KB Output is correct
25 Correct 9 ms 43356 KB Output is correct
26 Correct 51 ms 57036 KB Output is correct
27 Correct 65 ms 56520 KB Output is correct
28 Correct 10 ms 45656 KB Output is correct
29 Correct 9 ms 43352 KB Output is correct
30 Correct 9 ms 43356 KB Output is correct
31 Correct 68 ms 56496 KB Output is correct
32 Correct 10 ms 45600 KB Output is correct
33 Correct 95 ms 66540 KB Output is correct
34 Correct 80 ms 56632 KB Output is correct
35 Correct 12 ms 43868 KB Output is correct
36 Correct 77 ms 57700 KB Output is correct
37 Correct 10 ms 43864 KB Output is correct
38 Correct 11 ms 45788 KB Output is correct
39 Correct 54 ms 56788 KB Output is correct
40 Correct 11 ms 45916 KB Output is correct
41 Correct 64 ms 56776 KB Output is correct
42 Correct 100 ms 59816 KB Output is correct
43 Correct 9 ms 43352 KB Output is correct
44 Correct 89 ms 67272 KB Output is correct
45 Correct 85 ms 61840 KB Output is correct
46 Correct 10 ms 43868 KB Output is correct
47 Correct 11 ms 45660 KB Output is correct

Subtask #4
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 61 ms 55604 KB Output is correct
2 Correct 75 ms 61508 KB Output is correct
3 Correct 11 ms 43868 KB Output is correct
4 Correct 11 ms 45660 KB Output is correct
5 Correct 11 ms 43356 KB Output is correct
6 Correct 9 ms 43356 KB Output is correct
7 Correct 11 ms 45660 KB Output is correct
8 Correct 93 ms 58328 KB Output is correct
9 Correct 10 ms 43868 KB Output is correct
10 Correct 68 ms 56772 KB Output is correct
11 Correct 9 ms 43356 KB Output is correct
12 Correct 72 ms 56728 KB Output is correct
13 Correct 93 ms 58568 KB Output is correct
14 Correct 98 ms 62748 KB Output is correct
15 Correct 56 ms 56824 KB Output is correct
16 Correct 11 ms 45868 KB Output is correct
17 Correct 9 ms 43356 KB Output is correct
18 Correct 77 ms 62268 KB Output is correct
19 Correct 139 ms 68020 KB Output is correct
20 Correct 10 ms 43864 KB Output is correct
21 Correct 10 ms 43356 KB Output is correct
22 Correct 66 ms 58736 KB Output is correct
23 Correct 11 ms 43864 KB Output is correct
24 Correct 77 ms 57332 KB Output is correct
25 Correct 122 ms 66244 KB Output is correct
26 Correct 11 ms 43868 KB Output is correct
27 Correct 11 ms 45944 KB Output is correct
28 Correct 11 ms 45660 KB Output is correct
29 Correct 10 ms 43868 KB Output is correct
30 Correct 10 ms 43864 KB Output is correct

Subtask #5
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 14 ms 43356 KB Output is correct
2 Correct 9 ms 43356 KB Output is correct
3 Correct 10 ms 43468 KB Output is correct
4 Correct 9 ms 43472 KB Output is correct
5 Correct 10 ms 43356 KB Output is correct
6 Correct 9 ms 43356 KB Output is correct
7 Correct 8 ms 41304 KB Output is correct
8 Correct 9 ms 43356 KB Output is correct
9 Correct 9 ms 43352 KB Output is correct
10 Correct 9 ms 43356 KB Output is correct
11 Correct 9 ms 43568 KB Output is correct
12 Correct 9 ms 43352 KB Output is correct
13 Correct 9 ms 43356 KB Output is correct
14 Correct 9 ms 43356 KB Output is correct
15 Correct 9 ms 43352 KB Output is correct
16 Correct 10 ms 43544 KB Output is correct
17 Correct 10 ms 43356 KB Output is correct
18 Correct 9 ms 43468 KB Output is correct
19 Correct 9 ms 43356 KB Output is correct
20 Correct 9 ms 43352 KB Output is correct
21 Correct 9 ms 43356 KB Output is correct
22 Correct 9 ms 43356 KB Output is correct
23 Correct 9 ms 43356 KB Output is correct
24 Correct 9 ms 43560 KB Output is correct
25 Correct 9 ms 43352 KB Output is correct
26 Correct 11 ms 43868 KB Output is correct
27 Correct 12 ms 45660 KB Output is correct
28 Correct 11 ms 44124 KB Output is correct
29 Correct 11 ms 43868 KB Output is correct
30 Correct 11 ms 43896 KB Output is correct
31 Correct 10 ms 43496 KB Output is correct
32 Correct 11 ms 44120 KB Output is correct
33 Correct 9 ms 43352 KB Output is correct
34 Correct 12 ms 45660 KB Output is correct
35 Correct 11 ms 43868 KB Output is correct
36 Correct 11 ms 43868 KB Output is correct
37 Correct 12 ms 43868 KB Output is correct
38 Correct 9 ms 43352 KB Output is correct
39 Correct 11 ms 45660 KB Output is correct
40 Correct 10 ms 43868 KB Output is correct
41 Correct 11 ms 45660 KB Output is correct
42 Correct 12 ms 45660 KB Output is correct
43 Correct 11 ms 46052 KB Output is correct
44 Correct 10 ms 43356 KB Output is correct
45 Correct 11 ms 45780 KB Output is correct
46 Correct 11 ms 43736 KB Output is correct
47 Correct 9 ms 43356 KB Output is correct
48 Correct 11 ms 43868 KB Output is correct
49 Correct 11 ms 43864 KB Output is correct
50 Correct 11 ms 45916 KB Output is correct
51 Correct 11 ms 45660 KB Output is correct
52 Correct 10 ms 43900 KB Output is correct
53 Correct 11 ms 43744 KB Output is correct
54 Correct 13 ms 45660 KB Output is correct
55 Correct 9 ms 43356 KB Output is correct
56 Correct 51 ms 57036 KB Output is correct
57 Correct 65 ms 56520 KB Output is correct
58 Correct 10 ms 45656 KB Output is correct
59 Correct 9 ms 43352 KB Output is correct
60 Correct 9 ms 43356 KB Output is correct
61 Correct 68 ms 56496 KB Output is correct
62 Correct 10 ms 45600 KB Output is correct
63 Correct 95 ms 66540 KB Output is correct
64 Correct 80 ms 56632 KB Output is correct
65 Correct 12 ms 43868 KB Output is correct
66 Correct 77 ms 57700 KB Output is correct
67 Correct 10 ms 43864 KB Output is correct
68 Correct 11 ms 45788 KB Output is correct
69 Correct 54 ms 56788 KB Output is correct
70 Correct 11 ms 45916 KB Output is correct
71 Correct 64 ms 56776 KB Output is correct
72 Correct 100 ms 59816 KB Output is correct
73 Correct 9 ms 43352 KB Output is correct
74 Correct 89 ms 67272 KB Output is correct
75 Correct 85 ms 61840 KB Output is correct
76 Correct 10 ms 43868 KB Output is correct
77 Correct 11 ms 45660 KB Output is correct
78 Correct 61 ms 55604 KB Output is correct
79 Correct 75 ms 61508 KB Output is correct
80 Correct 11 ms 43868 KB Output is correct
81 Correct 11 ms 45660 KB Output is correct
82 Correct 11 ms 43356 KB Output is correct
83 Correct 9 ms 43356 KB Output is correct
84 Correct 11 ms 45660 KB Output is correct
85 Correct 93 ms 58328 KB Output is correct
86 Correct 10 ms 43868 KB Output is correct
87 Correct 68 ms 56772 KB Output is correct
88 Correct 9 ms 43356 KB Output is correct
89 Correct 72 ms 56728 KB Output is correct
90 Correct 93 ms 58568 KB Output is correct
91 Correct 98 ms 62748 KB Output is correct
92 Correct 56 ms 56824 KB Output is correct
93 Correct 11 ms 45868 KB Output is correct
94 Correct 9 ms 43356 KB Output is correct
95 Correct 77 ms 62268 KB Output is correct
96 Correct 139 ms 68020 KB Output is correct
97 Correct 10 ms 43864 KB Output is correct
98 Correct 10 ms 43356 KB Output is correct
99 Correct 66 ms 58736 KB Output is correct
100 Correct 11 ms 43864 KB Output is correct
101 Correct 77 ms 57332 KB Output is correct
102 Correct 122 ms 66244 KB Output is correct
103 Correct 11 ms 43868 KB Output is correct
104 Correct 11 ms 45944 KB Output is correct
105 Correct 11 ms 45660 KB Output is correct
106 Correct 10 ms 43868 KB Output is correct
107 Correct 10 ms 43864 KB Output is correct
108 Correct 459 ms 123816 KB Output is correct
109 Correct 774 ms 141260 KB Output is correct
110 Correct 798 ms 157376 KB Output is correct
111 Correct 983 ms 177256 KB Output is correct
112 Correct 822 ms 158284 KB Output is correct
113 Correct 541 ms 144284 KB Output is correct
114 Correct 546 ms 115740 KB Output is correct
115 Correct 546 ms 116084 KB Output is correct
116 Correct 673 ms 119000 KB Output is correct
117 Correct 829 ms 146296 KB Output is correct
118 Correct 565 ms 115652 KB Output is correct
119 Correct 796 ms 146436 KB Output is correct
120 Correct 990 ms 166000 KB Output is correct
121 Correct 760 ms 146360 KB Output is correct
122 Correct 697 ms 126900 KB Output is correct
123 Correct 525 ms 149356 KB Output is correct
124 Correct 815 ms 139188 KB Output is correct