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답안 #750551

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
750551 2023-05-29T17:00:13 Z PoonYaPat Mergers (JOI19_mergers) C++14
100 / 100
 1436 ms 209308 KB 
#include <bits/stdc++.h>
using namespace std;
typedef pair<int,int> pii;

int n,k,p[500001][20],group[500001],level[500001],mark[500001];
vector<int> adj1[500001],adj2[500001],g[500001];
set<int> temp[500001];
vector<pii> edge;
bool vis[500001];

void dfs1(int x, int par) {
    level[x]=level[par]+1;
    p[x][0]=par;
    for (int i=1; i<20; ++i) p[x][i]=p[p[x][i-1]][i-1];

    for (auto s : adj1[x]) {
        if (s==par) continue;
        dfs1(s,x);
    }
}

int lca(int x, int y) {
    if (level[x]<level[y]) swap(x,y);
    int dif=level[x]-level[y];
    for (int i=0; i<20; ++i) {
        if (dif&(1<<i)) x=p[x][i];
    }
    if (x==y) return x;

    for (int i=19; i>=0; --i) {
        if (p[x][i]!=p[y][i]) {
            x=p[x][i];
            y=p[y][i];
        }
    }
    return p[x][0];
}

void dfs2(int x, int par) {
    for (auto s : adj1[x]) {
        if (s==par) continue;
        dfs2(s,x);
        mark[x]+=mark[s];
    }
}

void dfs3(int x, int gr) {
    vis[x]=true;
    group[x]=gr;
    for (auto s : adj2[x]) {
        if (!vis[s]) dfs3(s,gr);
    }
}

int main() {
    ios_base::sync_with_stdio(0); cin.tie(0);
    cin>>n>>k;
    for (int i=0; i<n-1; ++i) {
        int a,b; cin>>a>>b;
        adj1[a].push_back(b);
        adj1[b].push_back(a);
        edge.push_back(pii(a,b));
    }

    for (int i=1; i<=n; ++i) {
        int x; cin>>x;
        g[x].push_back(i);
    }

    dfs1(1,0);

    for (int i=1; i<=k; ++i) {
        for (int j=1; j<g[i].size(); ++j) {
            int LCA=lca(g[i][j],g[i][j-1]);
            ++mark[g[i][j]];
            ++mark[g[i][j-1]];
            mark[LCA]-=2;
        }
    }

    dfs2(1,0);

    for (int i=2; i<=n; ++i) {
        if (mark[i]>0) {
            adj2[i].push_back(p[i][0]);
            adj2[p[i][0]].push_back(i);
        }
    }

    int cnt=0;
    for (int i=1; i<=n; ++i) {
        if (!vis[i]) dfs3(i,++cnt);
    }

    for (auto s : edge) {
        if (group[s.first]==group[s.second]) continue;
        temp[group[s.first]].insert(group[s.second]);
        temp[group[s.second]].insert(group[s.first]);
    }

    int leaf=0;
    for (int i=1; i<=cnt; ++i) {
        if (temp[i].size()==1) ++leaf;
    }

    cout<<(leaf+1)/2;
}

Compilation message

mergers.cpp: In function 'int main()':
mergers.cpp:73:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   73 |         for (int j=1; j<g[i].size(); ++j) {
      |                       ~^~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 27 ms 58964 KB Output is correct
2 Correct 29 ms 58964 KB Output is correct
3 Correct 27 ms 59060 KB Output is correct
4 Correct 28 ms 58964 KB Output is correct
5 Correct 29 ms 59008 KB Output is correct
6 Correct 30 ms 59028 KB Output is correct
7 Correct 29 ms 59044 KB Output is correct
8 Correct 27 ms 59088 KB Output is correct
9 Correct 28 ms 59040 KB Output is correct
10 Correct 27 ms 59040 KB Output is correct
11 Correct 28 ms 59032 KB Output is correct
12 Correct 27 ms 59036 KB Output is correct
13 Correct 28 ms 58964 KB Output is correct
14 Correct 27 ms 59032 KB Output is correct
15 Correct 28 ms 58964 KB Output is correct
16 Correct 30 ms 58956 KB Output is correct
17 Correct 30 ms 58952 KB Output is correct
18 Correct 32 ms 59020 KB Output is correct
19 Correct 27 ms 58992 KB Output is correct
20 Correct 29 ms 58996 KB Output is correct
21 Correct 30 ms 58968 KB Output is correct
22 Correct 28 ms 59032 KB Output is correct
23 Correct 27 ms 59044 KB Output is correct
24 Correct 27 ms 59028 KB Output is correct

Subtask #2
24.0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 27 ms 58964 KB Output is correct
2 Correct 29 ms 58964 KB Output is correct
3 Correct 27 ms 59060 KB Output is correct
4 Correct 28 ms 58964 KB Output is correct
5 Correct 29 ms 59008 KB Output is correct
6 Correct 30 ms 59028 KB Output is correct
7 Correct 29 ms 59044 KB Output is correct
8 Correct 27 ms 59088 KB Output is correct
9 Correct 28 ms 59040 KB Output is correct
10 Correct 27 ms 59040 KB Output is correct
11 Correct 28 ms 59032 KB Output is correct
12 Correct 27 ms 59036 KB Output is correct
13 Correct 28 ms 58964 KB Output is correct
14 Correct 27 ms 59032 KB Output is correct
15 Correct 28 ms 58964 KB Output is correct
16 Correct 30 ms 58956 KB Output is correct
17 Correct 30 ms 58952 KB Output is correct
18 Correct 32 ms 59020 KB Output is correct
19 Correct 27 ms 58992 KB Output is correct
20 Correct 29 ms 58996 KB Output is correct
21 Correct 30 ms 58968 KB Output is correct
22 Correct 28 ms 59032 KB Output is correct
23 Correct 27 ms 59044 KB Output is correct
24 Correct 27 ms 59028 KB Output is correct
25 Correct 26 ms 58964 KB Output is correct
26 Correct 31 ms 59772 KB Output is correct
27 Correct 30 ms 59508 KB Output is correct
28 Correct 31 ms 59852 KB Output is correct
29 Correct 30 ms 59812 KB Output is correct
30 Correct 30 ms 59596 KB Output is correct
31 Correct 28 ms 59008 KB Output is correct
32 Correct 30 ms 59860 KB Output is correct
33 Correct 27 ms 58968 KB Output is correct
34 Correct 30 ms 59604 KB Output is correct
35 Correct 34 ms 59872 KB Output is correct
36 Correct 30 ms 59512 KB Output is correct
37 Correct 30 ms 59552 KB Output is correct
38 Correct 27 ms 59068 KB Output is correct
39 Correct 30 ms 59640 KB Output is correct
40 Correct 29 ms 59604 KB Output is correct
41 Correct 30 ms 59560 KB Output is correct
42 Correct 31 ms 59608 KB Output is correct
43 Correct 31 ms 59716 KB Output is correct
44 Correct 28 ms 59056 KB Output is correct
45 Correct 30 ms 59672 KB Output is correct
46 Correct 29 ms 59596 KB Output is correct
47 Correct 30 ms 59020 KB Output is correct
48 Correct 30 ms 59532 KB Output is correct
49 Correct 30 ms 59812 KB Output is correct
50 Correct 33 ms 59872 KB Output is correct
51 Correct 30 ms 59604 KB Output is correct
52 Correct 30 ms 59528 KB Output is correct
53 Correct 29 ms 59704 KB Output is correct
54 Correct 30 ms 59596 KB Output is correct

Subtask #3
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 27 ms 58964 KB Output is correct
2 Correct 29 ms 58964 KB Output is correct
3 Correct 27 ms 59060 KB Output is correct
4 Correct 28 ms 58964 KB Output is correct
5 Correct 29 ms 59008 KB Output is correct
6 Correct 30 ms 59028 KB Output is correct
7 Correct 29 ms 59044 KB Output is correct
8 Correct 27 ms 59088 KB Output is correct
9 Correct 28 ms 59040 KB Output is correct
10 Correct 27 ms 59040 KB Output is correct
11 Correct 28 ms 59032 KB Output is correct
12 Correct 27 ms 59036 KB Output is correct
13 Correct 28 ms 58964 KB Output is correct
14 Correct 27 ms 59032 KB Output is correct
15 Correct 28 ms 58964 KB Output is correct
16 Correct 30 ms 58956 KB Output is correct
17 Correct 30 ms 58952 KB Output is correct
18 Correct 32 ms 59020 KB Output is correct
19 Correct 27 ms 58992 KB Output is correct
20 Correct 29 ms 58996 KB Output is correct
21 Correct 30 ms 58968 KB Output is correct
22 Correct 28 ms 59032 KB Output is correct
23 Correct 27 ms 59044 KB Output is correct
24 Correct 27 ms 59028 KB Output is correct
25 Correct 28 ms 59004 KB Output is correct
26 Correct 99 ms 77804 KB Output is correct
27 Correct 142 ms 77244 KB Output is correct
28 Correct 29 ms 59596 KB Output is correct
29 Correct 28 ms 58964 KB Output is correct
30 Correct 27 ms 59068 KB Output is correct
31 Correct 130 ms 77176 KB Output is correct
32 Correct 29 ms 59544 KB Output is correct
33 Correct 207 ms 84208 KB Output is correct
34 Correct 152 ms 77260 KB Output is correct
35 Correct 29 ms 59604 KB Output is correct
36 Correct 174 ms 77916 KB Output is correct
37 Correct 32 ms 59564 KB Output is correct
38 Correct 29 ms 59496 KB Output is correct
39 Correct 98 ms 77756 KB Output is correct
40 Correct 29 ms 59812 KB Output is correct
41 Correct 128 ms 77048 KB Output is correct
42 Correct 192 ms 79440 KB Output is correct
43 Correct 27 ms 59028 KB Output is correct
44 Correct 168 ms 84384 KB Output is correct
45 Correct 165 ms 80780 KB Output is correct
46 Correct 29 ms 59604 KB Output is correct
47 Correct 30 ms 59620 KB Output is correct

Subtask #4
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 95 ms 76364 KB Output is correct
2 Correct 158 ms 84588 KB Output is correct
3 Correct 34 ms 59732 KB Output is correct
4 Correct 30 ms 59604 KB Output is correct
5 Correct 28 ms 59036 KB Output is correct
6 Correct 28 ms 59064 KB Output is correct
7 Correct 29 ms 59528 KB Output is correct
8 Correct 146 ms 78988 KB Output is correct
9 Correct 31 ms 59596 KB Output is correct
10 Correct 136 ms 77344 KB Output is correct
11 Correct 27 ms 58968 KB Output is correct
12 Correct 150 ms 77224 KB Output is correct
13 Correct 147 ms 79836 KB Output is correct
14 Correct 159 ms 86064 KB Output is correct
15 Correct 108 ms 77764 KB Output is correct
16 Correct 31 ms 59672 KB Output is correct
17 Correct 29 ms 59072 KB Output is correct
18 Correct 151 ms 84880 KB Output is correct
19 Correct 181 ms 89968 KB Output is correct
20 Correct 29 ms 59556 KB Output is correct
21 Correct 28 ms 59092 KB Output is correct
22 Correct 118 ms 79948 KB Output is correct
23 Correct 31 ms 59604 KB Output is correct
24 Correct 144 ms 78272 KB Output is correct
25 Correct 183 ms 88764 KB Output is correct
26 Correct 32 ms 59744 KB Output is correct
27 Correct 31 ms 59904 KB Output is correct
28 Correct 44 ms 59616 KB Output is correct
29 Correct 29 ms 59636 KB Output is correct
30 Correct 30 ms 59612 KB Output is correct

Subtask #5
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 27 ms 58964 KB Output is correct
2 Correct 29 ms 58964 KB Output is correct
3 Correct 27 ms 59060 KB Output is correct
4 Correct 28 ms 58964 KB Output is correct
5 Correct 29 ms 59008 KB Output is correct
6 Correct 30 ms 59028 KB Output is correct
7 Correct 29 ms 59044 KB Output is correct
8 Correct 27 ms 59088 KB Output is correct
9 Correct 28 ms 59040 KB Output is correct
10 Correct 27 ms 59040 KB Output is correct
11 Correct 28 ms 59032 KB Output is correct
12 Correct 27 ms 59036 KB Output is correct
13 Correct 28 ms 58964 KB Output is correct
14 Correct 27 ms 59032 KB Output is correct
15 Correct 28 ms 58964 KB Output is correct
16 Correct 30 ms 58956 KB Output is correct
17 Correct 30 ms 58952 KB Output is correct
18 Correct 32 ms 59020 KB Output is correct
19 Correct 27 ms 58992 KB Output is correct
20 Correct 29 ms 58996 KB Output is correct
21 Correct 30 ms 58968 KB Output is correct
22 Correct 28 ms 59032 KB Output is correct
23 Correct 27 ms 59044 KB Output is correct
24 Correct 27 ms 59028 KB Output is correct
25 Correct 26 ms 58964 KB Output is correct
26 Correct 31 ms 59772 KB Output is correct
27 Correct 30 ms 59508 KB Output is correct
28 Correct 31 ms 59852 KB Output is correct
29 Correct 30 ms 59812 KB Output is correct
30 Correct 30 ms 59596 KB Output is correct
31 Correct 28 ms 59008 KB Output is correct
32 Correct 30 ms 59860 KB Output is correct
33 Correct 27 ms 58968 KB Output is correct
34 Correct 30 ms 59604 KB Output is correct
35 Correct 34 ms 59872 KB Output is correct
36 Correct 30 ms 59512 KB Output is correct
37 Correct 30 ms 59552 KB Output is correct
38 Correct 27 ms 59068 KB Output is correct
39 Correct 30 ms 59640 KB Output is correct
40 Correct 29 ms 59604 KB Output is correct
41 Correct 30 ms 59560 KB Output is correct
42 Correct 31 ms 59608 KB Output is correct
43 Correct 31 ms 59716 KB Output is correct
44 Correct 28 ms 59056 KB Output is correct
45 Correct 30 ms 59672 KB Output is correct
46 Correct 29 ms 59596 KB Output is correct
47 Correct 30 ms 59020 KB Output is correct
48 Correct 30 ms 59532 KB Output is correct
49 Correct 30 ms 59812 KB Output is correct
50 Correct 33 ms 59872 KB Output is correct
51 Correct 30 ms 59604 KB Output is correct
52 Correct 30 ms 59528 KB Output is correct
53 Correct 29 ms 59704 KB Output is correct
54 Correct 30 ms 59596 KB Output is correct
55 Correct 28 ms 59004 KB Output is correct
56 Correct 99 ms 77804 KB Output is correct
57 Correct 142 ms 77244 KB Output is correct
58 Correct 29 ms 59596 KB Output is correct
59 Correct 28 ms 58964 KB Output is correct
60 Correct 27 ms 59068 KB Output is correct
61 Correct 130 ms 77176 KB Output is correct
62 Correct 29 ms 59544 KB Output is correct
63 Correct 207 ms 84208 KB Output is correct
64 Correct 152 ms 77260 KB Output is correct
65 Correct 29 ms 59604 KB Output is correct
66 Correct 174 ms 77916 KB Output is correct
67 Correct 32 ms 59564 KB Output is correct
68 Correct 29 ms 59496 KB Output is correct
69 Correct 98 ms 77756 KB Output is correct
70 Correct 29 ms 59812 KB Output is correct
71 Correct 128 ms 77048 KB Output is correct
72 Correct 192 ms 79440 KB Output is correct
73 Correct 27 ms 59028 KB Output is correct
74 Correct 168 ms 84384 KB Output is correct
75 Correct 165 ms 80780 KB Output is correct
76 Correct 29 ms 59604 KB Output is correct
77 Correct 30 ms 59620 KB Output is correct
78 Correct 95 ms 76364 KB Output is correct
79 Correct 158 ms 84588 KB Output is correct
80 Correct 34 ms 59732 KB Output is correct
81 Correct 30 ms 59604 KB Output is correct
82 Correct 28 ms 59036 KB Output is correct
83 Correct 28 ms 59064 KB Output is correct
84 Correct 29 ms 59528 KB Output is correct
85 Correct 146 ms 78988 KB Output is correct
86 Correct 31 ms 59596 KB Output is correct
87 Correct 136 ms 77344 KB Output is correct
88 Correct 27 ms 58968 KB Output is correct
89 Correct 150 ms 77224 KB Output is correct
90 Correct 147 ms 79836 KB Output is correct
91 Correct 159 ms 86064 KB Output is correct
92 Correct 108 ms 77764 KB Output is correct
93 Correct 31 ms 59672 KB Output is correct
94 Correct 29 ms 59072 KB Output is correct
95 Correct 151 ms 84880 KB Output is correct
96 Correct 181 ms 89968 KB Output is correct
97 Correct 29 ms 59556 KB Output is correct
98 Correct 28 ms 59092 KB Output is correct
99 Correct 118 ms 79948 KB Output is correct
100 Correct 31 ms 59604 KB Output is correct
101 Correct 144 ms 78272 KB Output is correct
102 Correct 183 ms 88764 KB Output is correct
103 Correct 32 ms 59744 KB Output is correct
104 Correct 31 ms 59904 KB Output is correct
105 Correct 44 ms 59616 KB Output is correct
106 Correct 29 ms 59636 KB Output is correct
107 Correct 30 ms 59612 KB Output is correct
108 Correct 677 ms 154152 KB Output is correct
109 Correct 1410 ms 161704 KB Output is correct
110 Correct 1436 ms 172848 KB Output is correct
111 Correct 1205 ms 209308 KB Output is correct
112 Correct 1382 ms 187484 KB Output is correct
113 Correct 1137 ms 182836 KB Output is correct
114 Correct 858 ms 144252 KB Output is correct
115 Correct 846 ms 144216 KB Output is correct
116 Correct 985 ms 146620 KB Output is correct
117 Correct 1071 ms 188776 KB Output is correct
118 Correct 846 ms 143636 KB Output is correct
119 Correct 1059 ms 188616 KB Output is correct
120 Correct 1225 ms 202768 KB Output is correct
121 Correct 1043 ms 188468 KB Output is correct
122 Correct 971 ms 157088 KB Output is correct
123 Correct 1038 ms 188076 KB Output is correct
124 Correct 1069 ms 175340 KB Output is correct