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답안 #919383

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
919383 2024-01-31T17:17:08 Z imarn Mergers (JOI19_mergers) C++14
100 / 100
 1384 ms 193548 KB 
#include<bits/stdc++.h>
#define ll long long
#define pii pair<int,int>
#define pll pair<ll,ll>
#define f first
#define s second
#define pb push_back
#define all(x) x.begin(),x.end()
#define vi vector<int>
#define vvi vector<vi>
#define vp vector<pii>
using namespace std;
const int N=5e5+5;
vector<int>g[N],gr[N];
set<int>gg[N];
int dep[N],up[N][21],pr[N],d[N],t=0;
int get(int r){
    return pr[r]==r?r:pr[r]=get(pr[r]);
}
void dfs(int u,int p,int l){
    dep[u]=l;up[u][0]=p;d[u]=++t;
    for(int i=1;i<=20;i++)up[u][i]=up[up[u][i-1]][i-1];
    for(auto v:g[u]){
        if(v==p)continue;
        dfs(v,u,l+1);
    }
}
int qr(int a,int b){
    if(dep[a]>dep[b])swap(a,b);
    for(int i=20;i>=0;i--)if(dep[b]-(1<<i)>=dep[a])b=up[b][i];
    if(a==b)return a;
    for(int i=20;i>=0;i--)if(up[a][i]!=up[b][i])a=up[a][i],b=up[b][i];
    return up[a][0];
}
bool cmp(int a,int b){
    return d[a]<d[b];
}
int main(){
    ios_base::sync_with_stdio(0);cin.tie(0);
    int n,k;cin>>n>>k;iota(pr,pr+n+1,0);
    for(int i=1;i<=n-1;i++){
        int u,v;cin>>u>>v;g[u].pb(v);g[v].pb(u);
    }dfs(1,1,0);
    for(int i=1,x;i<=n;i++)cin>>x,gr[x].pb(i);
    for(int i=1;i<=k;i++){
        sort(gr[i].begin(),gr[i].end(),cmp);
        for(int j=1;j<gr[i].size();j++){
            int lca=qr(gr[i][j-1],gr[i][j]);
            int u=gr[i][j-1],v=gr[i][j];
            while(get(u)!=get(lca)){
                int uu=up[get(u)][0];
                pr[get(u)]=get(uu);u=uu;
            }
            while(get(v)!=get(lca)){
                int vv=up[get(v)][0];
                pr[get(v)]=get(vv);v=vv;
            }
        }
    }
    for(int i=1;i<=n;i++){
        for(auto it : g[i]){
            if(get(it)==get(i))continue;
            gg[get(it)].insert(get(i));
            gg[get(i)].insert(get(it));
        }
    }int ct=0;
    for(int i=1;i<=n;i++)if(gg[i].size()==1)ct++;
    cout<<(ct+1)/2;
}

Compilation message

mergers.cpp: In function 'int main()':
mergers.cpp:47:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   47 |         for(int j=1;j<gr[i].size();j++){
      |                     ~^~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 19 ms 55128 KB Output is correct
2 Correct 15 ms 55132 KB Output is correct
3 Correct 18 ms 55132 KB Output is correct
4 Correct 15 ms 55128 KB Output is correct
5 Correct 15 ms 55128 KB Output is correct
6 Correct 14 ms 55128 KB Output is correct
7 Correct 15 ms 55128 KB Output is correct
8 Correct 15 ms 55128 KB Output is correct
9 Correct 17 ms 55128 KB Output is correct
10 Correct 14 ms 55128 KB Output is correct
11 Correct 15 ms 55132 KB Output is correct
12 Correct 14 ms 55128 KB Output is correct
13 Correct 14 ms 55128 KB Output is correct
14 Correct 14 ms 55128 KB Output is correct
15 Correct 15 ms 55384 KB Output is correct
16 Correct 15 ms 55132 KB Output is correct
17 Correct 15 ms 55128 KB Output is correct
18 Correct 15 ms 55132 KB Output is correct
19 Correct 17 ms 55132 KB Output is correct
20 Correct 16 ms 55136 KB Output is correct
21 Correct 15 ms 55128 KB Output is correct
22 Correct 15 ms 55128 KB Output is correct
23 Correct 14 ms 55128 KB Output is correct
24 Correct 15 ms 55128 KB Output is correct

Subtask #2
24.0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 19 ms 55128 KB Output is correct
2 Correct 15 ms 55132 KB Output is correct
3 Correct 18 ms 55132 KB Output is correct
4 Correct 15 ms 55128 KB Output is correct
5 Correct 15 ms 55128 KB Output is correct
6 Correct 14 ms 55128 KB Output is correct
7 Correct 15 ms 55128 KB Output is correct
8 Correct 15 ms 55128 KB Output is correct
9 Correct 17 ms 55128 KB Output is correct
10 Correct 14 ms 55128 KB Output is correct
11 Correct 15 ms 55132 KB Output is correct
12 Correct 14 ms 55128 KB Output is correct
13 Correct 14 ms 55128 KB Output is correct
14 Correct 14 ms 55128 KB Output is correct
15 Correct 15 ms 55384 KB Output is correct
16 Correct 15 ms 55132 KB Output is correct
17 Correct 15 ms 55128 KB Output is correct
18 Correct 15 ms 55132 KB Output is correct
19 Correct 17 ms 55132 KB Output is correct
20 Correct 16 ms 55136 KB Output is correct
21 Correct 15 ms 55128 KB Output is correct
22 Correct 15 ms 55128 KB Output is correct
23 Correct 14 ms 55128 KB Output is correct
24 Correct 15 ms 55128 KB Output is correct
25 Correct 15 ms 55128 KB Output is correct
26 Correct 17 ms 55388 KB Output is correct
27 Correct 16 ms 55128 KB Output is correct
28 Correct 17 ms 55652 KB Output is correct
29 Correct 17 ms 55896 KB Output is correct
30 Correct 16 ms 55128 KB Output is correct
31 Correct 16 ms 55128 KB Output is correct
32 Correct 17 ms 55388 KB Output is correct
33 Correct 15 ms 55156 KB Output is correct
34 Correct 18 ms 55640 KB Output is correct
35 Correct 16 ms 55644 KB Output is correct
36 Correct 17 ms 55132 KB Output is correct
37 Correct 17 ms 55384 KB Output is correct
38 Correct 15 ms 55128 KB Output is correct
39 Correct 18 ms 55180 KB Output is correct
40 Correct 16 ms 55128 KB Output is correct
41 Correct 18 ms 55128 KB Output is correct
42 Correct 17 ms 55384 KB Output is correct
43 Correct 17 ms 55388 KB Output is correct
44 Correct 14 ms 55128 KB Output is correct
45 Correct 17 ms 55384 KB Output is correct
46 Correct 19 ms 55384 KB Output is correct
47 Correct 15 ms 55132 KB Output is correct
48 Correct 19 ms 55384 KB Output is correct
49 Correct 19 ms 55692 KB Output is correct
50 Correct 18 ms 55640 KB Output is correct
51 Correct 17 ms 55388 KB Output is correct
52 Correct 16 ms 55128 KB Output is correct
53 Correct 17 ms 55428 KB Output is correct
54 Correct 16 ms 55128 KB Output is correct

Subtask #3
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 19 ms 55128 KB Output is correct
2 Correct 15 ms 55132 KB Output is correct
3 Correct 18 ms 55132 KB Output is correct
4 Correct 15 ms 55128 KB Output is correct
5 Correct 15 ms 55128 KB Output is correct
6 Correct 14 ms 55128 KB Output is correct
7 Correct 15 ms 55128 KB Output is correct
8 Correct 15 ms 55128 KB Output is correct
9 Correct 17 ms 55128 KB Output is correct
10 Correct 14 ms 55128 KB Output is correct
11 Correct 15 ms 55132 KB Output is correct
12 Correct 14 ms 55128 KB Output is correct
13 Correct 14 ms 55128 KB Output is correct
14 Correct 14 ms 55128 KB Output is correct
15 Correct 15 ms 55384 KB Output is correct
16 Correct 15 ms 55132 KB Output is correct
17 Correct 15 ms 55128 KB Output is correct
18 Correct 15 ms 55132 KB Output is correct
19 Correct 17 ms 55132 KB Output is correct
20 Correct 16 ms 55136 KB Output is correct
21 Correct 15 ms 55128 KB Output is correct
22 Correct 15 ms 55128 KB Output is correct
23 Correct 14 ms 55128 KB Output is correct
24 Correct 15 ms 55128 KB Output is correct
25 Correct 15 ms 55384 KB Output is correct
26 Correct 82 ms 67716 KB Output is correct
27 Correct 102 ms 67364 KB Output is correct
28 Correct 16 ms 55128 KB Output is correct
29 Correct 15 ms 55128 KB Output is correct
30 Correct 14 ms 55136 KB Output is correct
31 Correct 110 ms 67340 KB Output is correct
32 Correct 16 ms 55128 KB Output is correct
33 Correct 114 ms 71440 KB Output is correct
34 Correct 105 ms 67528 KB Output is correct
35 Correct 17 ms 55128 KB Output is correct
36 Correct 105 ms 67696 KB Output is correct
37 Correct 16 ms 55160 KB Output is correct
38 Correct 17 ms 55384 KB Output is correct
39 Correct 85 ms 67656 KB Output is correct
40 Correct 16 ms 55384 KB Output is correct
41 Correct 116 ms 67472 KB Output is correct
42 Correct 100 ms 68684 KB Output is correct
43 Correct 16 ms 55128 KB Output is correct
44 Correct 145 ms 71916 KB Output is correct
45 Correct 136 ms 69688 KB Output is correct
46 Correct 16 ms 55384 KB Output is correct
47 Correct 17 ms 55132 KB Output is correct

Subtask #4
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 87 ms 67468 KB Output is correct
2 Correct 145 ms 79416 KB Output is correct
3 Correct 18 ms 55384 KB Output is correct
4 Correct 17 ms 55128 KB Output is correct
5 Correct 16 ms 55132 KB Output is correct
6 Correct 15 ms 55132 KB Output is correct
7 Correct 17 ms 55148 KB Output is correct
8 Correct 123 ms 69176 KB Output is correct
9 Correct 17 ms 55128 KB Output is correct
10 Correct 103 ms 67444 KB Output is correct
11 Correct 15 ms 55128 KB Output is correct
12 Correct 85 ms 67376 KB Output is correct
13 Correct 129 ms 70516 KB Output is correct
14 Correct 165 ms 79352 KB Output is correct
15 Correct 93 ms 67640 KB Output is correct
16 Correct 16 ms 55384 KB Output is correct
17 Correct 15 ms 55128 KB Output is correct
18 Correct 137 ms 77440 KB Output is correct
19 Correct 143 ms 81740 KB Output is correct
20 Correct 17 ms 55384 KB Output is correct
21 Correct 15 ms 55128 KB Output is correct
22 Correct 110 ms 70244 KB Output is correct
23 Correct 16 ms 55384 KB Output is correct
24 Correct 111 ms 68492 KB Output is correct
25 Correct 180 ms 80784 KB Output is correct
26 Correct 17 ms 55536 KB Output is correct
27 Correct 18 ms 55640 KB Output is correct
28 Correct 17 ms 55388 KB Output is correct
29 Correct 16 ms 55388 KB Output is correct
30 Correct 16 ms 55384 KB Output is correct

Subtask #5
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 19 ms 55128 KB Output is correct
2 Correct 15 ms 55132 KB Output is correct
3 Correct 18 ms 55132 KB Output is correct
4 Correct 15 ms 55128 KB Output is correct
5 Correct 15 ms 55128 KB Output is correct
6 Correct 14 ms 55128 KB Output is correct
7 Correct 15 ms 55128 KB Output is correct
8 Correct 15 ms 55128 KB Output is correct
9 Correct 17 ms 55128 KB Output is correct
10 Correct 14 ms 55128 KB Output is correct
11 Correct 15 ms 55132 KB Output is correct
12 Correct 14 ms 55128 KB Output is correct
13 Correct 14 ms 55128 KB Output is correct
14 Correct 14 ms 55128 KB Output is correct
15 Correct 15 ms 55384 KB Output is correct
16 Correct 15 ms 55132 KB Output is correct
17 Correct 15 ms 55128 KB Output is correct
18 Correct 15 ms 55132 KB Output is correct
19 Correct 17 ms 55132 KB Output is correct
20 Correct 16 ms 55136 KB Output is correct
21 Correct 15 ms 55128 KB Output is correct
22 Correct 15 ms 55128 KB Output is correct
23 Correct 14 ms 55128 KB Output is correct
24 Correct 15 ms 55128 KB Output is correct
25 Correct 15 ms 55128 KB Output is correct
26 Correct 17 ms 55388 KB Output is correct
27 Correct 16 ms 55128 KB Output is correct
28 Correct 17 ms 55652 KB Output is correct
29 Correct 17 ms 55896 KB Output is correct
30 Correct 16 ms 55128 KB Output is correct
31 Correct 16 ms 55128 KB Output is correct
32 Correct 17 ms 55388 KB Output is correct
33 Correct 15 ms 55156 KB Output is correct
34 Correct 18 ms 55640 KB Output is correct
35 Correct 16 ms 55644 KB Output is correct
36 Correct 17 ms 55132 KB Output is correct
37 Correct 17 ms 55384 KB Output is correct
38 Correct 15 ms 55128 KB Output is correct
39 Correct 18 ms 55180 KB Output is correct
40 Correct 16 ms 55128 KB Output is correct
41 Correct 18 ms 55128 KB Output is correct
42 Correct 17 ms 55384 KB Output is correct
43 Correct 17 ms 55388 KB Output is correct
44 Correct 14 ms 55128 KB Output is correct
45 Correct 17 ms 55384 KB Output is correct
46 Correct 19 ms 55384 KB Output is correct
47 Correct 15 ms 55132 KB Output is correct
48 Correct 19 ms 55384 KB Output is correct
49 Correct 19 ms 55692 KB Output is correct
50 Correct 18 ms 55640 KB Output is correct
51 Correct 17 ms 55388 KB Output is correct
52 Correct 16 ms 55128 KB Output is correct
53 Correct 17 ms 55428 KB Output is correct
54 Correct 16 ms 55128 KB Output is correct
55 Correct 15 ms 55384 KB Output is correct
56 Correct 82 ms 67716 KB Output is correct
57 Correct 102 ms 67364 KB Output is correct
58 Correct 16 ms 55128 KB Output is correct
59 Correct 15 ms 55128 KB Output is correct
60 Correct 14 ms 55136 KB Output is correct
61 Correct 110 ms 67340 KB Output is correct
62 Correct 16 ms 55128 KB Output is correct
63 Correct 114 ms 71440 KB Output is correct
64 Correct 105 ms 67528 KB Output is correct
65 Correct 17 ms 55128 KB Output is correct
66 Correct 105 ms 67696 KB Output is correct
67 Correct 16 ms 55160 KB Output is correct
68 Correct 17 ms 55384 KB Output is correct
69 Correct 85 ms 67656 KB Output is correct
70 Correct 16 ms 55384 KB Output is correct
71 Correct 116 ms 67472 KB Output is correct
72 Correct 100 ms 68684 KB Output is correct
73 Correct 16 ms 55128 KB Output is correct
74 Correct 145 ms 71916 KB Output is correct
75 Correct 136 ms 69688 KB Output is correct
76 Correct 16 ms 55384 KB Output is correct
77 Correct 17 ms 55132 KB Output is correct
78 Correct 87 ms 67468 KB Output is correct
79 Correct 145 ms 79416 KB Output is correct
80 Correct 18 ms 55384 KB Output is correct
81 Correct 17 ms 55128 KB Output is correct
82 Correct 16 ms 55132 KB Output is correct
83 Correct 15 ms 55132 KB Output is correct
84 Correct 17 ms 55148 KB Output is correct
85 Correct 123 ms 69176 KB Output is correct
86 Correct 17 ms 55128 KB Output is correct
87 Correct 103 ms 67444 KB Output is correct
88 Correct 15 ms 55128 KB Output is correct
89 Correct 85 ms 67376 KB Output is correct
90 Correct 129 ms 70516 KB Output is correct
91 Correct 165 ms 79352 KB Output is correct
92 Correct 93 ms 67640 KB Output is correct
93 Correct 16 ms 55384 KB Output is correct
94 Correct 15 ms 55128 KB Output is correct
95 Correct 137 ms 77440 KB Output is correct
96 Correct 143 ms 81740 KB Output is correct
97 Correct 17 ms 55384 KB Output is correct
98 Correct 15 ms 55128 KB Output is correct
99 Correct 110 ms 70244 KB Output is correct
100 Correct 16 ms 55384 KB Output is correct
101 Correct 111 ms 68492 KB Output is correct
102 Correct 180 ms 80784 KB Output is correct
103 Correct 17 ms 55536 KB Output is correct
104 Correct 18 ms 55640 KB Output is correct
105 Correct 17 ms 55388 KB Output is correct
106 Correct 16 ms 55388 KB Output is correct
107 Correct 16 ms 55384 KB Output is correct
108 Correct 668 ms 122456 KB Output is correct
109 Correct 962 ms 130620 KB Output is correct
110 Correct 978 ms 137328 KB Output is correct
111 Correct 1296 ms 193548 KB Output is correct
112 Correct 1384 ms 169052 KB Output is correct
113 Correct 1089 ms 173800 KB Output is correct
114 Correct 851 ms 120104 KB Output is correct
115 Correct 825 ms 120528 KB Output is correct
116 Correct 955 ms 125028 KB Output is correct
117 Correct 1261 ms 182880 KB Output is correct
118 Correct 822 ms 121752 KB Output is correct
119 Correct 1288 ms 183116 KB Output is correct
120 Correct 1275 ms 191276 KB Output is correct
121 Correct 1278 ms 183200 KB Output is correct
122 Correct 1071 ms 138200 KB Output is correct
123 Correct 1339 ms 184536 KB Output is correct
124 Correct 1077 ms 164992 KB Output is correct