oj.uz

답안 #620041

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
620041 2022-08-02T19:55:52 Z AbdelmagedNour Mergers (JOI19_mergers) C++17
100 / 100
 1154 ms 194108 KB 
#include<bits/stdc++.h>
using namespace std;
const int N=500005;
long long p[N][20],val[N],dep[N],st[N],id;
vector<vector<int>>adj;
void pre_dfs(int v,int par){
    p[v][0]=par;
    st[v]=id++;
    for(int i=1;i<20;i++)p[v][i]=p[p[v][i-1]][i-1];
    for(auto&u:adj[v]){
        if(u==par)continue;
        dep[u]=dep[v]+1;
        pre_dfs(u,v);
    }
}
int P[N],sz[N];
int f(int x){
    return (P[x]==x?x:P[x]=f(P[x]));
}
void join(int a, int b){
	a=f(a),b=f(b);
	if(a==b)return;
	if(sz[a]<sz[b])swap(a, b);
	P[b]=a;
	sz[a]+=sz[b];
}
void dfs_up(int v,int par){
    for(auto&u:adj[v]){
        if(u==par)continue;
        dfs_up(u,v);
        val[v]+=val[u];
    }
    if(val[v])join(v,par);
}
int LCA(int u,int v){
    if(u==v)return u;
    if(dep[u]<dep[v])swap(u,v);
    int k=dep[u]-dep[v];
    for(int i=__lg(k+1);i>=0;i--){
        if(k&(1<<i))u=p[u][i];
    }
    if(u==v)return u;
    for(int i=__lg(dep[u]+1);i>=0;i--){
        if(p[u][i]==p[v][i])continue;
        u=p[u][i];
        v=p[v][i];
    }
    return p[u][0];
}
int cnt(int v,int par){
    int res=0;
    for(auto&u:adj[v]){
        if(u==par)continue;
        res+=cnt(u,v);
    }
    return max(res,(val[v]==0?1:0));
}
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int n,k;
    cin>>n>>k;
    adj.resize(n+1);
    for(int i=1;i<n;i++){
        int u,v;
        cin>>u>>v;
        adj[u].push_back(v);
        adj[v].push_back(u);
    }
    pre_dfs(1,0);
    vector<vector<int>>state(k+1);
    for(int i=1;i<=n;i++){
        int x;
        cin>>x;
        state[x].push_back(i);
    }
    for(int i=1;i<=k;i++){
        sort(state[i].begin(),state[i].end(),[](int i,int j){
                return st[i]<st[j];
             });
        int lca=LCA(state[i][0],state[i].back());
        for(int j=0;j<state[i].size();j++){
            int u=state[i][j];
            val[u]++;val[lca]--;
        }
    }
    iota(P,P+n+1,0);
    fill(sz,sz+n+1,1);
    dfs_up(1,0);
    vector<vector<int>>adj2(n+1);
    for(int i=1;i<=n;i++){
        for(auto&u:adj[i]){
            if(f(i)!=f(u))adj2[f(i)].push_back(f(u));
        }
    }
    int res=0;
    for(int i=1;i<=n;i++)res+=(adj2[i].size()==1);
    cout<<(res+1)/2;
    return 0;
}

Compilation message

mergers.cpp: In function 'int main()':
mergers.cpp:84:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   84 |         for(int j=0;j<state[i].size();j++){
      |                     ~^~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 0 ms 340 KB Output is correct
18 Correct 1 ms 336 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 0 ms 340 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 0 ms 336 KB Output is correct
23 Correct 0 ms 332 KB Output is correct
24 Correct 1 ms 340 KB Output is correct

Subtask #2
24.0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 0 ms 340 KB Output is correct
18 Correct 1 ms 336 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 0 ms 340 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 0 ms 336 KB Output is correct
23 Correct 0 ms 332 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 0 ms 340 KB Output is correct
26 Correct 4 ms 1364 KB Output is correct
27 Correct 2 ms 1116 KB Output is correct
28 Correct 3 ms 1500 KB Output is correct
29 Correct 3 ms 1364 KB Output is correct
30 Correct 3 ms 1240 KB Output is correct
31 Correct 1 ms 340 KB Output is correct
32 Correct 3 ms 1492 KB Output is correct
33 Correct 1 ms 340 KB Output is correct
34 Correct 2 ms 1236 KB Output is correct
35 Correct 3 ms 1368 KB Output is correct
36 Correct 2 ms 1108 KB Output is correct
37 Correct 3 ms 1236 KB Output is correct
38 Correct 0 ms 340 KB Output is correct
39 Correct 2 ms 1236 KB Output is correct
40 Correct 2 ms 1116 KB Output is correct
41 Correct 2 ms 1236 KB Output is correct
42 Correct 3 ms 1236 KB Output is correct
43 Correct 3 ms 1364 KB Output is correct
44 Correct 1 ms 340 KB Output is correct
45 Correct 3 ms 1364 KB Output is correct
46 Correct 4 ms 1240 KB Output is correct
47 Correct 0 ms 340 KB Output is correct
48 Correct 2 ms 1236 KB Output is correct
49 Correct 2 ms 1492 KB Output is correct
50 Correct 3 ms 1492 KB Output is correct
51 Correct 3 ms 1128 KB Output is correct
52 Correct 2 ms 1236 KB Output is correct
53 Correct 2 ms 1236 KB Output is correct
54 Correct 2 ms 1108 KB Output is correct

Subtask #3
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 0 ms 340 KB Output is correct
18 Correct 1 ms 336 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 0 ms 340 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 0 ms 336 KB Output is correct
23 Correct 0 ms 332 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 336 KB Output is correct
26 Correct 72 ms 28720 KB Output is correct
27 Correct 110 ms 28408 KB Output is correct
28 Correct 2 ms 1236 KB Output is correct
29 Correct 1 ms 340 KB Output is correct
30 Correct 0 ms 340 KB Output is correct
31 Correct 98 ms 28268 KB Output is correct
32 Correct 2 ms 1236 KB Output is correct
33 Correct 133 ms 34048 KB Output is correct
34 Correct 93 ms 28368 KB Output is correct
35 Correct 2 ms 1112 KB Output is correct
36 Correct 123 ms 28880 KB Output is correct
37 Correct 2 ms 1108 KB Output is correct
38 Correct 3 ms 1116 KB Output is correct
39 Correct 71 ms 28672 KB Output is correct
40 Correct 3 ms 1364 KB Output is correct
41 Correct 129 ms 28204 KB Output is correct
42 Correct 119 ms 30028 KB Output is correct
43 Correct 1 ms 340 KB Output is correct
44 Correct 125 ms 34204 KB Output is correct
45 Correct 115 ms 31180 KB Output is correct
46 Correct 2 ms 1244 KB Output is correct
47 Correct 2 ms 1108 KB Output is correct

Subtask #4
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 74 ms 28228 KB Output is correct
2 Correct 99 ms 36732 KB Output is correct
3 Correct 3 ms 1236 KB Output is correct
4 Correct 2 ms 1236 KB Output is correct
5 Correct 1 ms 336 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 2 ms 1236 KB Output is correct
8 Correct 114 ms 30668 KB Output is correct
9 Correct 2 ms 1108 KB Output is correct
10 Correct 96 ms 28132 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 113 ms 28096 KB Output is correct
13 Correct 124 ms 30920 KB Output is correct
14 Correct 106 ms 36092 KB Output is correct
15 Correct 72 ms 28228 KB Output is correct
16 Correct 2 ms 1236 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 97 ms 35480 KB Output is correct
19 Correct 138 ms 39284 KB Output is correct
20 Correct 3 ms 1236 KB Output is correct
21 Correct 0 ms 340 KB Output is correct
22 Correct 81 ms 31112 KB Output is correct
23 Correct 2 ms 1236 KB Output is correct
24 Correct 122 ms 28572 KB Output is correct
25 Correct 169 ms 37996 KB Output is correct
26 Correct 3 ms 1492 KB Output is correct
27 Correct 3 ms 1492 KB Output is correct
28 Correct 3 ms 1364 KB Output is correct
29 Correct 2 ms 1236 KB Output is correct
30 Correct 2 ms 1248 KB Output is correct

Subtask #5
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 0 ms 340 KB Output is correct
18 Correct 1 ms 336 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 0 ms 340 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 0 ms 336 KB Output is correct
23 Correct 0 ms 332 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 0 ms 340 KB Output is correct
26 Correct 4 ms 1364 KB Output is correct
27 Correct 2 ms 1116 KB Output is correct
28 Correct 3 ms 1500 KB Output is correct
29 Correct 3 ms 1364 KB Output is correct
30 Correct 3 ms 1240 KB Output is correct
31 Correct 1 ms 340 KB Output is correct
32 Correct 3 ms 1492 KB Output is correct
33 Correct 1 ms 340 KB Output is correct
34 Correct 2 ms 1236 KB Output is correct
35 Correct 3 ms 1368 KB Output is correct
36 Correct 2 ms 1108 KB Output is correct
37 Correct 3 ms 1236 KB Output is correct
38 Correct 0 ms 340 KB Output is correct
39 Correct 2 ms 1236 KB Output is correct
40 Correct 2 ms 1116 KB Output is correct
41 Correct 2 ms 1236 KB Output is correct
42 Correct 3 ms 1236 KB Output is correct
43 Correct 3 ms 1364 KB Output is correct
44 Correct 1 ms 340 KB Output is correct
45 Correct 3 ms 1364 KB Output is correct
46 Correct 4 ms 1240 KB Output is correct
47 Correct 0 ms 340 KB Output is correct
48 Correct 2 ms 1236 KB Output is correct
49 Correct 2 ms 1492 KB Output is correct
50 Correct 3 ms 1492 KB Output is correct
51 Correct 3 ms 1128 KB Output is correct
52 Correct 2 ms 1236 KB Output is correct
53 Correct 2 ms 1236 KB Output is correct
54 Correct 2 ms 1108 KB Output is correct
55 Correct 1 ms 336 KB Output is correct
56 Correct 72 ms 28720 KB Output is correct
57 Correct 110 ms 28408 KB Output is correct
58 Correct 2 ms 1236 KB Output is correct
59 Correct 1 ms 340 KB Output is correct
60 Correct 0 ms 340 KB Output is correct
61 Correct 98 ms 28268 KB Output is correct
62 Correct 2 ms 1236 KB Output is correct
63 Correct 133 ms 34048 KB Output is correct
64 Correct 93 ms 28368 KB Output is correct
65 Correct 2 ms 1112 KB Output is correct
66 Correct 123 ms 28880 KB Output is correct
67 Correct 2 ms 1108 KB Output is correct
68 Correct 3 ms 1116 KB Output is correct
69 Correct 71 ms 28672 KB Output is correct
70 Correct 3 ms 1364 KB Output is correct
71 Correct 129 ms 28204 KB Output is correct
72 Correct 119 ms 30028 KB Output is correct
73 Correct 1 ms 340 KB Output is correct
74 Correct 125 ms 34204 KB Output is correct
75 Correct 115 ms 31180 KB Output is correct
76 Correct 2 ms 1244 KB Output is correct
77 Correct 2 ms 1108 KB Output is correct
78 Correct 74 ms 28228 KB Output is correct
79 Correct 99 ms 36732 KB Output is correct
80 Correct 3 ms 1236 KB Output is correct
81 Correct 2 ms 1236 KB Output is correct
82 Correct 1 ms 336 KB Output is correct
83 Correct 1 ms 340 KB Output is correct
84 Correct 2 ms 1236 KB Output is correct
85 Correct 114 ms 30668 KB Output is correct
86 Correct 2 ms 1108 KB Output is correct
87 Correct 96 ms 28132 KB Output is correct
88 Correct 1 ms 340 KB Output is correct
89 Correct 113 ms 28096 KB Output is correct
90 Correct 124 ms 30920 KB Output is correct
91 Correct 106 ms 36092 KB Output is correct
92 Correct 72 ms 28228 KB Output is correct
93 Correct 2 ms 1236 KB Output is correct
94 Correct 1 ms 340 KB Output is correct
95 Correct 97 ms 35480 KB Output is correct
96 Correct 138 ms 39284 KB Output is correct
97 Correct 3 ms 1236 KB Output is correct
98 Correct 0 ms 340 KB Output is correct
99 Correct 81 ms 31112 KB Output is correct
100 Correct 2 ms 1236 KB Output is correct
101 Correct 122 ms 28572 KB Output is correct
102 Correct 169 ms 37996 KB Output is correct
103 Correct 3 ms 1492 KB Output is correct
104 Correct 3 ms 1492 KB Output is correct
105 Correct 3 ms 1364 KB Output is correct
106 Correct 2 ms 1236 KB Output is correct
107 Correct 2 ms 1248 KB Output is correct
108 Correct 607 ms 148220 KB Output is correct
109 Correct 965 ms 150312 KB Output is correct
110 Correct 936 ms 159220 KB Output is correct
111 Correct 1154 ms 194108 KB Output is correct
112 Correct 1024 ms 181256 KB Output is correct
113 Correct 638 ms 174372 KB Output is correct
114 Correct 737 ms 136256 KB Output is correct
115 Correct 744 ms 136292 KB Output is correct
116 Correct 825 ms 141300 KB Output is correct
117 Correct 859 ms 177584 KB Output is correct
118 Correct 753 ms 134648 KB Output is correct
119 Correct 915 ms 177572 KB Output is correct
120 Correct 1060 ms 188160 KB Output is correct
121 Correct 848 ms 177624 KB Output is correct
122 Correct 920 ms 153524 KB Output is correct
123 Correct 695 ms 180508 KB Output is correct
124 Correct 992 ms 168060 KB Output is correct