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답안 #991895

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
991895 2024-06-03T10:39:22 Z MarwenElarbi Mergers (JOI19_mergers) C++17
100 / 100
 1335 ms 260016 KB 
#include<bits/stdc++.h>
using namespace std;
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#define fi first
#define se second
#define ll long long
#define pb push_back
const int nax=5e5+5;
vector<int> adj[nax];
set<int> stl[nax];
vector<int> sz(nax);
vector<int> sum(nax);
vector<int> s(nax);
vector<int> colours(nax);
int ans=0;
vector<int> parent(nax);
vector<int> adj2[nax];
vector<bool> vis(nax);
int find(int x){
    if(parent[x]==x) return x;
    return parent[x]=find(parent[x]);
}
bool sameset(int x,int y){
    return find(x)==find(y);
}
void joinset(int x,int y){
    x=find(x);
    y=find(y);
    parent[x]=y;
}
void precompute(int x,int p){
    stl[x].insert(s[x]);
    sum[x]=colours[s[x]];
    sz[x]=1;
    for(auto u:adj[x]){
        if(u==p) continue;
        precompute(u,x);
        sz[x]+=sz[u];
        if(stl[u].size()>stl[x].size()){
            sum[x]=sum[u];
            swap(stl[u],stl[x]);
        }    
        for(auto i:stl[u]){
            if(stl[x].count(i)) continue;
            stl[x].insert(i);
            sum[x]+=colours[i];
        }
    }
    if(p!=-1&&sum[x]>sz[x]){
        joinset(x,p);
    }
}
void nab(int x,int p){
    for(auto u:adj[x]){
        if(u==p) continue;
        if(!sameset(x,u)){
            int curx=find(x);
            int cury=find(u);
            adj2[curx].pb(cury);
            adj2[cury].pb(curx);
        }
        nab(u,x);
    }
}
void dfs(int x,int p){
    //cout <<x<<" "<<adj2[x].size()<<endl;
    if(adj2[x].size()==1) ans++;
    for(auto u:adj2[x]){
        if(u==p) continue;
        dfs(u,x);
    }
    return;
}
int main() {
    int n,k;
    cin>>n>>k;
    for (int i = 0; i < n-1; ++i)
    {
        int a,b;
        cin>>a>>b;
        a--;b--;
        adj[a].pb(b);
        adj[b].pb(a);
    }
    for (int i = 0; i < n; ++i)
    {
        parent[i]=i;
    }
    for (int i = 0; i < n; ++i)
    {
        cin>>s[i];
        s[i]--;
        colours[s[i]]++;
    }
    precompute(0,-1);
    nab(0,-1);
    for (int i = 0; i < n; ++i)
    {
        if(adj2[i].size()>0){
            dfs(i,-1);
            break;
        }
    }
    cout <<(ans+1)/2<<endl;
}

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 14 ms 57180 KB Output is correct
2 Correct 13 ms 57276 KB Output is correct
3 Correct 12 ms 57180 KB Output is correct
4 Correct 13 ms 57152 KB Output is correct
5 Correct 13 ms 57180 KB Output is correct
6 Correct 12 ms 57180 KB Output is correct
7 Correct 13 ms 57180 KB Output is correct
8 Correct 13 ms 57204 KB Output is correct
9 Correct 13 ms 57264 KB Output is correct
10 Correct 13 ms 57176 KB Output is correct
11 Correct 14 ms 57180 KB Output is correct
12 Correct 17 ms 57180 KB Output is correct
13 Correct 11 ms 57180 KB Output is correct
14 Correct 13 ms 57180 KB Output is correct
15 Correct 14 ms 57180 KB Output is correct
16 Correct 14 ms 57180 KB Output is correct
17 Correct 13 ms 57276 KB Output is correct
18 Correct 14 ms 57180 KB Output is correct
19 Correct 14 ms 57040 KB Output is correct
20 Correct 12 ms 57180 KB Output is correct
21 Correct 12 ms 57180 KB Output is correct
22 Correct 12 ms 57180 KB Output is correct
23 Correct 11 ms 57260 KB Output is correct
24 Correct 11 ms 57260 KB Output is correct

Subtask #2
24.0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 14 ms 57180 KB Output is correct
2 Correct 13 ms 57276 KB Output is correct
3 Correct 12 ms 57180 KB Output is correct
4 Correct 13 ms 57152 KB Output is correct
5 Correct 13 ms 57180 KB Output is correct
6 Correct 12 ms 57180 KB Output is correct
7 Correct 13 ms 57180 KB Output is correct
8 Correct 13 ms 57204 KB Output is correct
9 Correct 13 ms 57264 KB Output is correct
10 Correct 13 ms 57176 KB Output is correct
11 Correct 14 ms 57180 KB Output is correct
12 Correct 17 ms 57180 KB Output is correct
13 Correct 11 ms 57180 KB Output is correct
14 Correct 13 ms 57180 KB Output is correct
15 Correct 14 ms 57180 KB Output is correct
16 Correct 14 ms 57180 KB Output is correct
17 Correct 13 ms 57276 KB Output is correct
18 Correct 14 ms 57180 KB Output is correct
19 Correct 14 ms 57040 KB Output is correct
20 Correct 12 ms 57180 KB Output is correct
21 Correct 12 ms 57180 KB Output is correct
22 Correct 12 ms 57180 KB Output is correct
23 Correct 11 ms 57260 KB Output is correct
24 Correct 11 ms 57260 KB Output is correct
25 Correct 11 ms 57180 KB Output is correct
26 Correct 14 ms 57692 KB Output is correct
27 Correct 14 ms 57436 KB Output is correct
28 Correct 14 ms 57948 KB Output is correct
29 Correct 15 ms 57948 KB Output is correct
30 Correct 13 ms 57664 KB Output is correct
31 Correct 11 ms 57276 KB Output is correct
32 Correct 13 ms 57928 KB Output is correct
33 Correct 11 ms 57180 KB Output is correct
34 Correct 13 ms 57448 KB Output is correct
35 Correct 14 ms 57948 KB Output is correct
36 Correct 15 ms 57436 KB Output is correct
37 Correct 18 ms 57944 KB Output is correct
38 Correct 13 ms 57180 KB Output is correct
39 Correct 17 ms 57952 KB Output is correct
40 Correct 15 ms 57436 KB Output is correct
41 Correct 15 ms 57436 KB Output is correct
42 Correct 17 ms 57664 KB Output is correct
43 Correct 14 ms 57692 KB Output is correct
44 Correct 12 ms 57060 KB Output is correct
45 Correct 16 ms 57692 KB Output is correct
46 Correct 14 ms 57692 KB Output is correct
47 Correct 13 ms 57180 KB Output is correct
48 Correct 18 ms 57944 KB Output is correct
49 Correct 15 ms 57692 KB Output is correct
50 Correct 16 ms 57948 KB Output is correct
51 Correct 16 ms 57436 KB Output is correct
52 Correct 15 ms 57472 KB Output is correct
53 Correct 13 ms 57436 KB Output is correct
54 Correct 16 ms 57704 KB Output is correct

Subtask #3
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 14 ms 57180 KB Output is correct
2 Correct 13 ms 57276 KB Output is correct
3 Correct 12 ms 57180 KB Output is correct
4 Correct 13 ms 57152 KB Output is correct
5 Correct 13 ms 57180 KB Output is correct
6 Correct 12 ms 57180 KB Output is correct
7 Correct 13 ms 57180 KB Output is correct
8 Correct 13 ms 57204 KB Output is correct
9 Correct 13 ms 57264 KB Output is correct
10 Correct 13 ms 57176 KB Output is correct
11 Correct 14 ms 57180 KB Output is correct
12 Correct 17 ms 57180 KB Output is correct
13 Correct 11 ms 57180 KB Output is correct
14 Correct 13 ms 57180 KB Output is correct
15 Correct 14 ms 57180 KB Output is correct
16 Correct 14 ms 57180 KB Output is correct
17 Correct 13 ms 57276 KB Output is correct
18 Correct 14 ms 57180 KB Output is correct
19 Correct 14 ms 57040 KB Output is correct
20 Correct 12 ms 57180 KB Output is correct
21 Correct 12 ms 57180 KB Output is correct
22 Correct 12 ms 57180 KB Output is correct
23 Correct 11 ms 57260 KB Output is correct
24 Correct 11 ms 57260 KB Output is correct
25 Correct 13 ms 57180 KB Output is correct
26 Correct 81 ms 66764 KB Output is correct
27 Correct 111 ms 73300 KB Output is correct
28 Correct 13 ms 57436 KB Output is correct
29 Correct 12 ms 57184 KB Output is correct
30 Correct 13 ms 57180 KB Output is correct
31 Correct 83 ms 66644 KB Output is correct
32 Correct 16 ms 57436 KB Output is correct
33 Correct 93 ms 78156 KB Output is correct
34 Correct 100 ms 71864 KB Output is correct
35 Correct 15 ms 57436 KB Output is correct
36 Correct 96 ms 67668 KB Output is correct
37 Correct 13 ms 57436 KB Output is correct
38 Correct 15 ms 57436 KB Output is correct
39 Correct 83 ms 66892 KB Output is correct
40 Correct 15 ms 57692 KB Output is correct
41 Correct 84 ms 66392 KB Output is correct
42 Correct 93 ms 70228 KB Output is correct
43 Correct 11 ms 57180 KB Output is correct
44 Correct 88 ms 78420 KB Output is correct
45 Correct 100 ms 73544 KB Output is correct
46 Correct 13 ms 57436 KB Output is correct
47 Correct 13 ms 57692 KB Output is correct

Subtask #4
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 76 ms 65480 KB Output is correct
2 Correct 127 ms 73676 KB Output is correct
3 Correct 14 ms 57692 KB Output is correct
4 Correct 15 ms 57436 KB Output is correct
5 Correct 12 ms 57088 KB Output is correct
6 Correct 13 ms 57180 KB Output is correct
7 Correct 15 ms 57404 KB Output is correct
8 Correct 149 ms 80220 KB Output is correct
9 Correct 16 ms 57436 KB Output is correct
10 Correct 92 ms 66900 KB Output is correct
11 Correct 13 ms 57180 KB Output is correct
12 Correct 95 ms 66644 KB Output is correct
13 Correct 149 ms 79188 KB Output is correct
14 Correct 200 ms 94332 KB Output is correct
15 Correct 87 ms 66636 KB Output is correct
16 Correct 15 ms 57692 KB Output is correct
17 Correct 13 ms 57180 KB Output is correct
18 Correct 146 ms 75216 KB Output is correct
19 Correct 161 ms 83164 KB Output is correct
20 Correct 16 ms 57692 KB Output is correct
21 Correct 13 ms 57180 KB Output is correct
22 Correct 123 ms 69948 KB Output is correct
23 Correct 15 ms 57436 KB Output is correct
24 Correct 107 ms 68972 KB Output is correct
25 Correct 160 ms 81644 KB Output is correct
26 Correct 16 ms 57692 KB Output is correct
27 Correct 16 ms 57948 KB Output is correct
28 Correct 16 ms 57664 KB Output is correct
29 Correct 15 ms 57436 KB Output is correct
30 Correct 15 ms 57636 KB Output is correct

Subtask #5
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 14 ms 57180 KB Output is correct
2 Correct 13 ms 57276 KB Output is correct
3 Correct 12 ms 57180 KB Output is correct
4 Correct 13 ms 57152 KB Output is correct
5 Correct 13 ms 57180 KB Output is correct
6 Correct 12 ms 57180 KB Output is correct
7 Correct 13 ms 57180 KB Output is correct
8 Correct 13 ms 57204 KB Output is correct
9 Correct 13 ms 57264 KB Output is correct
10 Correct 13 ms 57176 KB Output is correct
11 Correct 14 ms 57180 KB Output is correct
12 Correct 17 ms 57180 KB Output is correct
13 Correct 11 ms 57180 KB Output is correct
14 Correct 13 ms 57180 KB Output is correct
15 Correct 14 ms 57180 KB Output is correct
16 Correct 14 ms 57180 KB Output is correct
17 Correct 13 ms 57276 KB Output is correct
18 Correct 14 ms 57180 KB Output is correct
19 Correct 14 ms 57040 KB Output is correct
20 Correct 12 ms 57180 KB Output is correct
21 Correct 12 ms 57180 KB Output is correct
22 Correct 12 ms 57180 KB Output is correct
23 Correct 11 ms 57260 KB Output is correct
24 Correct 11 ms 57260 KB Output is correct
25 Correct 11 ms 57180 KB Output is correct
26 Correct 14 ms 57692 KB Output is correct
27 Correct 14 ms 57436 KB Output is correct
28 Correct 14 ms 57948 KB Output is correct
29 Correct 15 ms 57948 KB Output is correct
30 Correct 13 ms 57664 KB Output is correct
31 Correct 11 ms 57276 KB Output is correct
32 Correct 13 ms 57928 KB Output is correct
33 Correct 11 ms 57180 KB Output is correct
34 Correct 13 ms 57448 KB Output is correct
35 Correct 14 ms 57948 KB Output is correct
36 Correct 15 ms 57436 KB Output is correct
37 Correct 18 ms 57944 KB Output is correct
38 Correct 13 ms 57180 KB Output is correct
39 Correct 17 ms 57952 KB Output is correct
40 Correct 15 ms 57436 KB Output is correct
41 Correct 15 ms 57436 KB Output is correct
42 Correct 17 ms 57664 KB Output is correct
43 Correct 14 ms 57692 KB Output is correct
44 Correct 12 ms 57060 KB Output is correct
45 Correct 16 ms 57692 KB Output is correct
46 Correct 14 ms 57692 KB Output is correct
47 Correct 13 ms 57180 KB Output is correct
48 Correct 18 ms 57944 KB Output is correct
49 Correct 15 ms 57692 KB Output is correct
50 Correct 16 ms 57948 KB Output is correct
51 Correct 16 ms 57436 KB Output is correct
52 Correct 15 ms 57472 KB Output is correct
53 Correct 13 ms 57436 KB Output is correct
54 Correct 16 ms 57704 KB Output is correct
55 Correct 13 ms 57180 KB Output is correct
56 Correct 81 ms 66764 KB Output is correct
57 Correct 111 ms 73300 KB Output is correct
58 Correct 13 ms 57436 KB Output is correct
59 Correct 12 ms 57184 KB Output is correct
60 Correct 13 ms 57180 KB Output is correct
61 Correct 83 ms 66644 KB Output is correct
62 Correct 16 ms 57436 KB Output is correct
63 Correct 93 ms 78156 KB Output is correct
64 Correct 100 ms 71864 KB Output is correct
65 Correct 15 ms 57436 KB Output is correct
66 Correct 96 ms 67668 KB Output is correct
67 Correct 13 ms 57436 KB Output is correct
68 Correct 15 ms 57436 KB Output is correct
69 Correct 83 ms 66892 KB Output is correct
70 Correct 15 ms 57692 KB Output is correct
71 Correct 84 ms 66392 KB Output is correct
72 Correct 93 ms 70228 KB Output is correct
73 Correct 11 ms 57180 KB Output is correct
74 Correct 88 ms 78420 KB Output is correct
75 Correct 100 ms 73544 KB Output is correct
76 Correct 13 ms 57436 KB Output is correct
77 Correct 13 ms 57692 KB Output is correct
78 Correct 76 ms 65480 KB Output is correct
79 Correct 127 ms 73676 KB Output is correct
80 Correct 14 ms 57692 KB Output is correct
81 Correct 15 ms 57436 KB Output is correct
82 Correct 12 ms 57088 KB Output is correct
83 Correct 13 ms 57180 KB Output is correct
84 Correct 15 ms 57404 KB Output is correct
85 Correct 149 ms 80220 KB Output is correct
86 Correct 16 ms 57436 KB Output is correct
87 Correct 92 ms 66900 KB Output is correct
88 Correct 13 ms 57180 KB Output is correct
89 Correct 95 ms 66644 KB Output is correct
90 Correct 149 ms 79188 KB Output is correct
91 Correct 200 ms 94332 KB Output is correct
92 Correct 87 ms 66636 KB Output is correct
93 Correct 15 ms 57692 KB Output is correct
94 Correct 13 ms 57180 KB Output is correct
95 Correct 146 ms 75216 KB Output is correct
96 Correct 161 ms 83164 KB Output is correct
97 Correct 16 ms 57692 KB Output is correct
98 Correct 13 ms 57180 KB Output is correct
99 Correct 123 ms 69948 KB Output is correct
100 Correct 15 ms 57436 KB Output is correct
101 Correct 107 ms 68972 KB Output is correct
102 Correct 160 ms 81644 KB Output is correct
103 Correct 16 ms 57692 KB Output is correct
104 Correct 16 ms 57948 KB Output is correct
105 Correct 16 ms 57664 KB Output is correct
106 Correct 15 ms 57436 KB Output is correct
107 Correct 15 ms 57636 KB Output is correct
108 Correct 770 ms 119236 KB Output is correct
109 Correct 705 ms 133460 KB Output is correct
110 Correct 624 ms 151636 KB Output is correct
111 Correct 1154 ms 191124 KB Output is correct
112 Correct 1091 ms 174024 KB Output is correct
113 Correct 954 ms 144004 KB Output is correct
114 Correct 553 ms 104532 KB Output is correct
115 Correct 544 ms 104532 KB Output is correct
116 Correct 880 ms 177764 KB Output is correct
117 Correct 1310 ms 260016 KB Output is correct
118 Correct 545 ms 104568 KB Output is correct
119 Correct 1259 ms 256088 KB Output is correct
120 Correct 1123 ms 180424 KB Output is correct
121 Correct 1335 ms 252500 KB Output is correct
122 Correct 1167 ms 231036 KB Output is correct
123 Correct 963 ms 149444 KB Output is correct
124 Correct 1115 ms 201504 KB Output is correct